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How to Choose a Security Door for a Commercial Building: A Practical UK Guide
Choosing a security door for a commercial building is about much more than finding a strong-looking steel door. Warehouses, offices, schools, factories, retail premises and utility buildings can all have very different security requirements, so the right specification depends on where the door is being installed, what it needs to protect and the level of risk involved. A standard steel door may provide a robust physical barrier, but some applications require independently tested high-security doors, while others need additional features such as fire resistance, panic escape hardware, access control, glazing or ventilation. Understanding these differences can help you avoid over-specifying an expensive door where it isn't necessary – or, more importantly, installing a door that doesn't provide the level of protection the building actually requires. In this guide, we'll look at the main factors to consider when choosing a commercial security door. What Is a Commercial Security Door? A commercial security door is designed to provide a stronger physical barrier against unauthorised access than a typical internal or external door. Steel is widely used for commercial security doors because it offers strength, durability and considerable flexibility in how a door can be configured. Depending on the application, a steel security door can be manufactured with different locking arrangements, hardware, glazing, ventilation and access-control options. However, it's important to distinguish between a door that is simply manufactured from steel and a door that has been independently tested to a recognised security standard.A steel door isn't automatically a security-rated door. Where a particular level of burglary resistance is required, the specification should consider an independently tested and certified product rather than relying purely on the material or appearance of the door. Start by Assessing the Security Risk Before choosing a door, think about what you are actually trying to protect. A door providing access to a general office storeroom is unlikely to face the same risks as an external entrance protecting valuable stock, critical equipment or infrastructure. Consider questions such as: - Is the door accessible from a public area?- What would an intruder gain access to if the door were breached?- Is valuable stock or equipment stored inside?- Has the property previously experienced attempted break-ins?- Is the door in an isolated or poorly monitored location?- Is a particular security standard specified by an insurer, architect or security consultant? The answers will help determine whether a robust general-purpose steel door is sufficient or whether a tested high-security door should be specified. What Does LPS 1175 Mean for Security Doors? For higher-risk applications, you may encounter doors tested to LPS 1175. LPS 1175 is a recognised standard used to assess the resistance of security products to forced entry. Testing considers the tools and attack methods that could realistically be used by an intruder. The standard doesn't only apply to doors. It is also used for products such as security shutters and grilles. This provides specifiers and customers with a more meaningful way of comparing security products than simply describing a door as "heavy duty" or "high security". The current Issue 8 classification uses a combination of a letter and number. Broadly, the letter relates to the threat/tool category used during testing and the number represents the minimum attack duration associated with the classification. This becomes increasingly important for higher-risk commercial and industrial sites where security performance needs to be demonstrated rather than assumed. We've explained the system in more detail in our guide to LPS 1175 Issue 7 and Issue 8 security ratings. Standard Steel Door or High-Security Door? Not every commercial building needs the highest security rating available. For many everyday applications, a well-specified steel door can provide an effective and durable solution. This might include general industrial buildings, storerooms, service areas and other locations where the primary objective is to provide a robust physical barrier. A tested high-security steel door becomes more appropriate where the consequences of forced entry are greater or where a particular security standard has been specified. These applications could include plant rooms, utilities, infrastructure, high-value storage areas and other sensitive premises. Choosing the highest possible security rating isn't necessarily the objective. The better approach is to select a door with a performance level appropriate to the identified risk. Security Door vs Fire Door: What's the Difference? This is an important distinction. Security resistance and fire resistance are not the same thing. A security door is primarily designed to resist unauthorised entry and physical attack. A fire-rated door is designed and tested to provide a specified level of fire resistance as part of a building's fire-safety strategy. A steel door shouldn't therefore be assumed to be fire rated simply because it is manufactured from steel. Equally, a fire-rated steel door doesn't automatically provide a particular level of forced-entry resistance. In buildings where both fire protection and security are required, the complete door specification needs to satisfy the relevant requirements for that location. This is one reason it's worth establishing the full performance requirements before choosing a door rather than selecting the product first and attempting to adapt the specification afterwards. Does the Security Door Need to Be an Emergency Exit? How people use the door is just as important as how secure it needs to be. Some security doors are intended primarily to restrict entry, while others form part of an escape route and must allow occupants to leave safely. Depending on the application, this may involve escape hardware such as panic or emergency-exit devices. A door should never be made more difficult to escape through simply to increase security. Where a door forms part of an emergency escape route, the fire strategy, relevant regulations and required exit hardware should all be considered as part of the specification. Choosing the Right Locking System The locking arrangement can have a significant impact on both security and everyday usability. A commercial steel security door may require conventional locking, multi-point locking or integration with an electronic access-control system, depending on its intended use. For example, a warehouse personnel entrance may have very different requirements from a restricted plant room accessed only by authorised engineers. Electronic access control can also be useful where a business needs greater control over who enters particular areas. The important point is to consider the door, frame, locking system and hardware as one complete security solution, rather than concentrating on the door leaf alone. Can Access Control Be Fitted to a Security Door? Yes, depending on the door specification. Commercial security doors can often be configured for access-control equipment, allowing businesses to control and monitor entry to restricted areas. This can be particularly useful in offices, industrial buildings, data centres, warehouses and infrastructure sites where different employees or contractors require different levels of access. If access control is required, it is best to identify this at the specification stage so that the door, locking arrangement and associated hardware can be designed appropriately. For security-rated products, any changes also need to be considered carefully so that the certified configuration isn't inadvertently compromised. Can Security Doors Have Windows? Security doesn't necessarily mean installing a completely solid door. Vision panels may be required for operational or safety reasons, particularly where staff need to see someone approaching from the opposite side of a door. However, glazing creates another element that needs to be considered as part of the overall specification. Where a particular security or fire performance is required, the glazing system and its installation need to be suitable for that requirement. Adding ordinary glazing to a high-security door could undermine the protection the door was selected to provide. The same principle applies to other additions. What About Ventilation? Plant rooms, electrical rooms and other service areas sometimes require permanent airflow. In these situations, a louvred steel door may be suitable. Again, the requirement needs to be considered alongside security. A large ventilation opening can potentially create a weak point if it isn't designed as part of the overall door specification. Rather than choosing a standard door and adding ventilation afterwards, it's better to specify the required airflow and security requirements together. Single or Double Security Doors? The size and use of the opening will determine whether a single or double door is more appropriate. Single doors work well for many personnel entrances and service areas, while double doors can provide a larger clear opening for equipment, deliveries and higher-traffic environments. The choice shouldn't be based solely on opening width. Consider how frequently the doors will be used, what needs to pass through them and whether both leaves need to operate regularly. Internal or External Security Door? External security doors face additional challenges. Alongside resistance to unauthorised entry, an external door may need to withstand weather exposure and frequent use. Its finish, threshold, seals and surrounding construction therefore need careful consideration. Internal security doors can be used to create secure zones within a larger building, protecting areas such as stockrooms, plant rooms, server rooms and restricted operational spaces. This can form part of a layered security approach, where an intruder has to overcome several separate barriers rather than gaining unrestricted access after breaching the building perimeter. Don't Forget the Surrounding Structure Even an extremely strong security door can only perform properly when it is installed into a suitable opening. The wall construction, frame and fixings are therefore important parts of the security system. Installing a high-security door into an unsuitable surrounding structure could create a weaker route of attack around the door itself. For higher-security applications in particular, the complete installation should follow the requirements associated with the tested product configuration. This is also why professional surveying and installation are important when specifying security-rated products. Which Security Door Is Right for Different Buildings? Different buildings naturally have different priorities. A warehouse may require robust external personnel doors alongside larger industrial access doors. A school may need to balance security with safe movement and emergency escape. A retail building may be particularly concerned about unauthorised access to stock or back-of-house areas. Factories and industrial premises may need doors protecting machinery, plant rooms and restricted areas, while utilities and infrastructure sites may require considerably higher levels of forced-entry resistance. There isn't therefore one "best security door" for every commercial property. The right solution comes from matching the door specification to the application, risk and required performance. Common Mistakes When Choosing a Security Door One of the biggest mistakes is assuming that any heavy steel door will provide high-security performance. Another is focusing exclusively on the door itself while overlooking the frame, locks, hardware, fixings and surrounding structure. It's also important not to confuse fire performance with security performance or to add glazing, louvres or alternative hardware without considering whether those changes affect the required certification. Finally, avoid automatically specifying the highest possible security level. Higher-security products are designed for particular risks and attack scenarios. A properly assessed and proportionate specification is usually the better approach. How to Specify a Commercial Security Door Before requesting a quotation, gather as much information as possible about the opening and its intended use. Useful information includes the approximate opening dimensions, wall construction, whether the door is internal or external, required security level, fire-rating requirements, access-control requirements, emergency-exit requirements, glazing or ventilation needs and preferred finish. If you're unsure about the security rating required, speak to your insurer, architect, security consultant or door supplier before finalising the specification. Getting these details right at the beginning can make the quotation and specification process considerably easier. Frequently Asked Questions About Security Doors Are steel doors more secure than wooden doors? Steel provides a strong and durable material for commercial doors, but the material alone doesn't determine the door's security performance. For applications requiring a defined level of forced-entry resistance, look for a complete doorset that has been tested and certified to an appropriate security standard. What is an LPS 1175 security door? An LPS 1175 security door is a doorset that has been tested and certified against defined forced-entry attack requirements under the LPS 1175 standard. Different classifications represent different attack scenarios and resistance periods. Is every steel door security rated? No. A door can be manufactured from steel without having an independently tested security rating. If a particular security classification is required, check the certification for the complete product. Can a security door also be fire rated? Potentially, but the two properties should be verified separately. Security resistance and fire resistance are different performance characteristics, so don't assume that a security-rated door is automatically fire rated or vice versa. Can you fit access control to a security door? Access-control systems can be incorporated into many commercial security doors. If you're specifying a security-rated product, however, the hardware and configuration should be appropriate to the tested and certified doorset. Can security doors have glass panels? Some security doors can incorporate vision panels. Where a particular security or fire rating is required, the glazing and its fixing system need to be compatible with that performance requirement. What security rating does my business need? That depends on the risks associated with the property, the value or importance of what is being protected and any requirements imposed by insurers or project specifications. Higher ratings aren't automatically necessary for every commercial building. Should security doors be professionally installed? Professional installation is particularly important for security-rated doors. The performance of the complete system depends on the door, frame, hardware, fixings and surrounding structure working together as intended. Choosing the Right Commercial Security Door Choosing a commercial security door isn't simply a question of how thick or heavy the door looks. The best specification considers the level of security required, how the building is used, whether fire resistance or emergency escape is needed, and whether the door requires features such as access control, glazing or ventilation. For higher-risk applications, independently tested products such as LPS 1175 security doors can provide evidence of how the product performs against defined forced-entry attacks. Security Direct can help you assess your opening and identify an appropriate steel-door solution for your building, whether you're securing a warehouse, school, office, industrial premises or higher-risk site. Need help choosing a security door? Contact Security Direct with your opening dimensions and requirements, and our team can help you identify a suitable solution. You can also read feedback from previous Security Direct customers through our Feefo reviews and Trustpilot reviews before making your decision.
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Window Security Mesh: A Practical Guide to Protecting Vulnerable Windows and Openings
Windows are often one of the most vulnerable points of a commercial or industrial building. Ground-floor windows, isolated glazing and openings at the rear or side of a property can all provide potential targets for vandalism and attempted break-ins. There are plenty of ways to improve window security, including roller shutters, security bars and retractable grilles. However, these aren't always necessary or practical.For some buildings, window security mesh provides a straightforward alternative. A strong steel mesh barrier can remain permanently in position, helping to protect the window and prevent unauthorised access while still allowing natural light, visibility and ventilation. At Security Direct, we supply made-to-measure Mesh Window Guards for a wide variety of commercial, public and industrial applications. With different mesh patterns, frames, finishes and fixing arrangements available, the system can be adapted to suit both the building and the level of protection required. What Is Window Security Mesh? Window security mesh is essentially a steel protective barrier installed across a window or other vulnerable opening. Unlike a solid roller shutter, it doesn't completely cover the window. Instead, the open mesh construction allows you to see through the barrier and enables air and natural light to continue passing through the opening. The mesh itself is contained within a steel perimeter frame, creating a strong, permanent window guard. Depending on the building, this can be installed over the face of the opening, within the window reveal or positioned away from the window using a stand-off arrangement. This makes security mesh particularly useful when the window needs continuous protection but you don't necessarily need a security product that can be opened and closed every day. Why Use Security Mesh on Windows? One of the biggest advantages of window security mesh is that it can protect against more than one type of risk. For example, an externally installed mesh guard creates a physical barrier in front of the glazing. This can help protect the glass against deliberate vandalism as well as accidental impacts. This can be particularly useful for schools, warehouses, factories, public buildings and commercial premises where windows may be exposed or situated in areas with limited surveillance. The same physical barrier can also make it much more difficult for someone to gain access through the window. However, it is important to distinguish between general-purpose security mesh and independently tested high-security mesh. Simply because a mesh panel looks substantial doesn't automatically mean that it has been tested to a recognised security standard.The required product should therefore be selected according to the actual risk. Where Can Window Security Mesh Be Used? One of the reasons we like security mesh is its versatility. We regularly see applications where a building has a vulnerable window but installing a roller shutter would be unnecessarily complicated. The customer may not need to open and close a security product every day; they simply want a permanent barrier between the window and anyone outside. A warehouse, for example, may have small ground-floor windows at the rear of the building. A plant room might need permanent ventilation but still require protection against unauthorised access. A school or community building might have glazing that is repeatedly vulnerable to damage. These are all situations where a fixed mesh window guard can make sense. Security mesh can also be used on offices, retail premises, industrial buildings, storage areas, sports facilities and public-sector buildings. Rather than starting with the product, we would always recommend starting with the problem. Are you primarily trying to protect the glass from vandalism, prevent access through the opening, or achieve both? That helps determine the most appropriate mesh and frame specification. Different Types of Window Security Mesh Security mesh doesn't have to mean one particular pattern or appearance. Our Mesh Window Guards can be manufactured using different mesh infills, allowing the amount of visibility and the overall appearance of the guard to be varied. A square welded mesh, for example, provides a simple and practical appearance and is available with different aperture sizes. A larger aperture generally creates a more open appearance, while a smaller aperture produces a denser barrier. Diamond mesh offers another option and can provide excellent visibility through the guard while still creating a substantial physical barrier. For more demanding applications, a much closer high-security or prison mesh can be used. The smaller openings make the panel significantly denser and may be more appropriate for buildings where the risk is greater. Perforated panels can also be considered where a different visual finish is preferred.This choice is useful because window security isn't purely about making something as heavy or enclosed as possible. In many buildings, retaining natural light, airflow and visibility is also important. Can You Still See Through Security Mesh? Yes, and this is one of the main advantages of choosing mesh rather than a solid security barrier. The level of visibility depends on the mesh pattern and aperture size, but the open construction means the window doesn't need to disappear behind a completely solid panel. From a distance, some mesh patterns can also be surprisingly unobtrusive, particularly when the frame and mesh are finished in a colour that complements the building. This can make security mesh useful where the appearance of the property matters but leaving the glazing completely exposed isn't an option. Does Window Security Mesh Affect Ventilation? Because air can pass through the openings in the mesh, security mesh can also be an excellent option where ventilation needs to be maintained. This is particularly relevant to plant rooms, service areas and industrial buildings where an opening may need to remain ventilated while still being protected. A solid shutter or panel would restrict airflow considerably more, whereas an appropriately specified mesh can provide a physical barrier without completely closing the opening. Of course, the exact amount of airflow depends on the mesh specification and the design of the window or opening itself. Should Security Mesh Be Fitted Inside or Outside? Window security mesh can be installed either internally or externally, and there are advantages to both approaches. If vandalism is the main concern, external installation is often particularly useful because the mesh sits between the potential source of damage and the glazing itself. Someone throwing an object or attempting to strike the window first encounters the steel mesh.Internal installation can be appropriate where external appearance is particularly important or where the building configuration makes an internal installation preferable.The correct position depends on the property, the type of window and the risk you're trying to address. For external installations, the finish also becomes important. Appropriate corrosion protection should be considered so that the mesh and frame are suitable for long-term exposure to the weather. What If the Window Needs to Open? This is something customers don't always consider until they start looking at the installation. If a fixed mesh panel is positioned directly in front of an opening window, it could prevent the window from operating correctly. Fortunately, that doesn't necessarily mean security mesh is unsuitable. A stand-off installation can position the mesh away from the wall, creating enough space for the window to operate behind it. For some openings, a cage-style arrangement can provide even greater clearance. There are also situations where occasional access to the window is required for cleaning or maintenance. In these cases, hinged or lift-out mesh panels may be considered instead of a completely fixed guard. These details are worth discussing at the quotation stage because they can be incorporated into the design rather than trying to work around them afterwards. Security Mesh vs Window Bars Security mesh and traditional window bars perform a similar basic function: they create a physical barrier across a vulnerable opening. The difference is in how they do it. Window bars normally use individual solid steel bars positioned across the opening. Security mesh creates a much closer pattern of steel apertures across the whole window. That closer pattern can make mesh particularly useful where protecting the glass itself is part of the requirement. A thrown object may still be able to pass between widely spaced window bars, whereas an appropriately selected mesh provides much smaller openings. Window bars, on the other hand, can provide a very simple and effective solution where the main concern is preventing someone from physically entering through the window. Neither is automatically the better product. It depends on what you're protecting against. Security Mesh vs Retractable Security Grilles The biggest difference between security mesh and a retractable grille is that mesh is normally intended to remain in position. A retractable grille can be opened and folded away when it isn't required. This can be ideal for offices, shops and other premises where the occupants want an unobstructed window during the working day. A fixed mesh guard makes more sense where continuous protection is desirable. Consider a small warehouse window at the rear of an industrial estate. If nobody needs regular access through that window and there is no reason to remove the security barrier each morning, a fixed mesh guard can provide a much simpler solution. For a customer-facing office window where appearance during opening hours is more important, a retractable grille might be preferable. What About Higher-Security Applications? For some buildings, standard mesh protection won't be sufficient. A project may have a specific security requirement set by an insurer, architect, security consultant or risk assessment. In these circumstances, it is important to select a product that has been tested to the required standard rather than assuming that any heavy-duty steel mesh will provide the same performance. Security Direct can also supply security-rated mesh window guards for applications where independently tested resistance to forced entry is required. This is particularly relevant when LPS 1175 is specified. LPS 1175 provides a recognised method for assessing the resistance of physical security products against deliberate forced entry using defined tools and attack methods. If your project specifies an LPS 1175 rating, the complete product and installation need to be considered rather than simply selecting a thicker piece of mesh. You can read more in our LPS 1175 Issue 7 and Issue 8 Testing guide. Getting the Installation Right The mesh is only one part of a good security installation. The frame, fixings and structure surrounding the window are also important. A substantial steel mesh panel needs to be attached to a suitable substrate if it is going to perform as intended. Depending on the opening, the mesh guard might be face-fixed around the window, installed within the reveal or mounted on stand-off brackets. This is also why made-to-measure manufacture is useful. Real windows aren't always simple rectangles with nothing around them. Pipes, handles, vents and other services may need to be accommodated, and suitable cut-outs can be incorporated into the design where necessary. Providing photographs and accurate dimensions when requesting a quotation can help us identify these issues before the guard is manufactured. How Much Does Window Security Mesh Cost? One advantage of window mesh is that it can provide a relatively straightforward way of protecting a vulnerable opening. The final price will depend on the dimensions of the window, mesh pattern, frame construction, finish and installation arrangement. Hinged panels, stand-off brackets, bespoke cut-outs and higher-security specifications can also affect the price. Because our Mesh Window Guards are made to measure, comparing products solely on a headline price can be misleading. A small fixed guard protecting a standard window is a very different product from a large externally mounted high-security system. The best approach is to provide the dimensions of the opening, photographs of the surrounding structure and a brief explanation of what you're trying to protect against. We can then help identify an appropriate specification and provide an accurate quotation. Is Window Security Mesh Right for Your Building? Security mesh is particularly worth considering when you want a permanent physical barrier without completely blocking the window. It can protect vulnerable glazing while allowing daylight and ventilation to continue through the opening. It can also be manufactured around the practical requirements of the building, whether that means providing clearance for an opening window or creating occasional access for maintenance. For some properties, window bars will be the simpler answer. For others, a retractable security grille or roller shutter will provide greater flexibility. The important thing is to choose the security product according to the risk and how the building is actually used. Frequently Asked Questions About Window Security Mesh What is window security mesh? Window security mesh is a steel mesh panel installed across a window or vulnerable opening. It creates a physical barrier that can help protect the glazing from vandalism and make unauthorised access through the opening more difficult. Can security mesh be fitted outside a window? Yes. External installation is often useful when protecting the glazing itself is a priority because the mesh forms a barrier in front of the glass. Internal installations are also possible depending on the building and security requirements. Can you still see through security mesh? Yes. Security mesh has an open construction, allowing visibility and natural light through the panel. How open it appears will depend on the mesh pattern and aperture size selected. Will window security mesh stop ventilation? No. Air can pass through the openings in the mesh, making it particularly useful for windows and openings where ventilation needs to be maintained. The amount of free airflow will depend on the particular mesh specification. Can I open my windows with security mesh installed? In many cases, yes. The mesh can potentially be positioned away from the window using a stand-off arrangement so that there is space for the window to operate behind it. This needs to be considered when the guard is designed. Is security mesh better than window bars? They serve slightly different requirements. Mesh provides smaller openings across the window and can be useful where vandalism and glazing protection are concerns. Window bars can provide a simpler physical barrier where preventing access through the window is the main objective. Is all window security mesh LPS 1175 rated? No. Standard security mesh shouldn't be assumed to have an LPS 1175 rating. Where independently tested security is required, a specifically certified security-rated product should be selected. Protecting Your Windows with Security Direct Windows don't always need to be hidden behind a solid shutter to improve their security.A well-designed window security mesh system can provide permanent protection while allowing the building to retain natural light, airflow and visibility. With different mesh patterns, frames, finishes and installation arrangements available, the product can be manufactured around the individual opening rather than forcing every building to use the same solution. Security Direct supplies made-to-measure Mesh Window Guards, alongside window bars, retractable security grilles and higher-security window protection for more demanding applications. View our Window Security Mesh or contact our team to discuss the windows you need to protect. You can also see what other customers have said about Security Direct through our Feefo reviews and Trustpilot reviews.
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LPS 1175 Issue 8 Explained: What Do A1, B3, C5, D10 and E10 Security Ratings Mean?
When choosing a security roller shutter, steel door or retractable security grille, it is easy to focus on how substantial the product looks. But appearance alone does not tell you how well a product will resist a determined attempt at forced entry. This is where LPS 1175 becomes important. LPS 1175 is a recognised standard for testing the resistance of physical security products to forced entry. Rather than relying on a manufacturer's description of a product as "high security", testing uses defined tools and attack methods to assess its performance. With LPS 1175 Issue 8, the way security ratings are expressed changed significantly. Instead of simply seeing classifications such as SR1, SR2 or SR3, you may now encounter ratings such as A1, B3, C5, D10 and E10. So what do these ratings actually mean, and which level of security should you consider? What Is LPS 1175? LPS 1175 is a standard covering the testing and certification of intruder-resistant building components and security products. It is administered through the Loss Prevention Certification Board (LPCB) and can apply to products including: Security roller shutters Steel security doors Retractable security grilles Security enclosures and barriers Other physical security systems During testing, specialists attempt to compromise the product using tools associated with the security rating being assessed. The testing is designed to identify the product's minimum resistance to attack rather than simply demonstrating that it can survive a single predetermined test. This gives architects, contractors, facilities managers, insurers and property owners an independent way of comparing security performance. LPS 1175 Issue 7 vs Issue 8: What Changed? If you have previously specified security products, you may be familiar with ratings such as SR1, SR2, SR3 and SR4. These belong to the Issue 7 rating system. Issue 8 introduced a more flexible classification system in which the threat/tool category and attack delay are identified separately. An Issue 8 classification therefore contains two elements: The letter identifies the threat level/tool category used during testing. The number identifies the minimum delay, in minutes, associated with the classification. For example: D10 = Category D threat/tool level + 10-minute minimum attack delay. This makes it easier for security professionals to specify protection according to the type of attack anticipated as well as the delay required. Are Issue 7 and Issue 8 Ratings Directly Equivalent? This is an important distinction. You will often see products described using terminology such as A1/SR1, B3/SR2, C5/SR3 or D10/SR4 to help customers understand the progression between older and newer security classifications. However, Issue 7 and Issue 8 ratings should not automatically be treated as direct equivalents. The testing and classification structure changed under Issue 8, so the individual LPCB certification for a product should always be checked against the requirements of the project. Understanding A1, B3, C5, D10 and E10 At Security Direct, we offer security products covering a range of security requirements, from lower-risk commercial applications through to products intended for significantly higher-risk environments. Here's a practical overview of the ratings customers are most likely to encounter. A1 / SR1 – Low Threat A1 represents an entry point into LPS 1175 Issue 8 certified physical security. The A represents the relevant tool/threat category, while 1 represents a minimum attack delay of one minute under the defined test conditions. Products at this level can be appropriate where a risk assessment identifies a relatively low threat but independently tested physical security is still required. Typical applications can include: Lower-risk commercial premises Internal security areas Offices Schools and public buildings Some domestic applications Security Direct offers roller shutters, steel doors and security grilles across this part of the range. View our A1/SR1 security products B3 / SR2 – Moderate Threat Moving up the range, B3 introduces a higher tool category combined with a three-minute minimum attack delay. This can be appropriate where there is a greater likelihood of a more determined attempt at forced entry. Applications can include: Retail premises Offices Schools Commercial properties Light industrial buildings Security Direct's range at this level includes options across roller shutters, security grilles, steel doors and other physical security products. The additional resistance can make B3 particularly relevant where a standard security shutter is not sufficient and independently verified attack resistance forms part of the specification. C5 / SR3 – Medium Threat C5 combines Category C tools with a five-minute minimum attack delay. Five minutes may not sound particularly long in everyday terms, but it is important to remember that this refers to working attack time under controlled test conditions, rather than somebody simply standing in front of the product for five minutes. At this level, Security Direct offers products including the E130 Elite (Lite) Single Skin, P130 Elite (Lite) and i100 Elite roller shutter options, depending on the required configuration. C5-rated products may be considered for environments where the consequences of unauthorised access are more significant, subject to the project's risk assessment and specification. View the E130 C5 Security Shutter D10 / SR4 – High Threat At D10, both the threat category and resistance period increase substantially. The classification combines Category D tools with a 10-minute minimum attack delay. Security Direct identifies higher ratings such as D10 for applications including: High-value retail Data centres Critical infrastructure Pharmaceutical sites Utility facilities This is the type of specification where security is generally part of a wider risk-management strategy rather than simply an additional deterrent at a door or window. Products at this level should therefore be considered as part of the overall security of the building, including the surrounding structure, access control and other protective measures. E10 / SR5 – Severe Threat At the upper end of the Security Direct roller shutter range is E10, combining Category E tools with a 10-minute attack delay. This type of product is intended for demanding applications where a risk assessment establishes the need for substantial resistance to forced entry. Security Direct currently offers an E130 Security Shutter – E10 (SR5) within its security-rated shutter range. Potential applications may include high-value and critical sites, but the appropriate rating should always be established by the project's security requirements rather than selecting a product purely because it carries the highest available classification. Does a Higher LPS 1175 Rating Always Mean a Better Choice? Not necessarily. It is tempting to assume that you should simply purchase the highest-rated security product available. In practice, good security specification is about matching the product to the risk. Factors to consider include: What is being protected?How attractive is the property or asset to an intruder?Where is the building located?How quickly could an attempted break-in be detected?Are there alarms, CCTV or security personnel?What are the insurer's requirements?What construction will the shutter, grille or door be fixed into?What does the project's security specification require? A warehouse storing relatively low-value goods will not necessarily require the same solution as a critical infrastructure facility. The objective is to create an appropriate level of protection rather than simply choosing the largest number. Why Attack Delay Matters One of the useful aspects of Issue 8 is its emphasis on the relationship between threat and delay. Physical security does not necessarily need to make unauthorised entry impossible indefinitely. Instead, its role can be to create sufficient resistance and delay for other security measures to become effective. For example, an attempted break-in may activate an alarm or attract attention. The longer an intruder is required to remain at the building attempting to defeat the physical security, the greater the opportunity for other elements of the security strategy to respond. This is why roller shutters, doors, grilles, CCTV, alarms, lighting and access control should ideally be considered together rather than in isolation. LPS 1175 Certification Is About More Than the Shutter Curtain Another important consideration is that certification relates to the tested product configuration. A strong shutter curtain fitted poorly into an unsuitable structure will not automatically deliver the performance associated with the certification. Depending on the product, the tested configuration can include elements such as the curtain or door leaf, guides or frame, locking arrangements, hardware and fixings. Installation and the supporting substrate therefore matter. Substituting components or failing to follow the manufacturer's installation requirements can compromise security performance. This is particularly important as security ratings increase. Which LPS 1175 Rating Do I Need? There isn't one rating that is right for every building, start with the risk assessment and project specification. For commercial projects, you should also check whether an insurer, architect, security consultant or other stakeholder has specified a particular standard or rating. If a specification states LPS 1175 Issue 8 C5, for example, don't assume that any product described simply as "high security" will satisfy that requirement. It's important to check the actual certification. Likewise, if an older specification refers to an Issue 7 SR rating, don't automatically substitute a newer product based only on an apparent comparison between SR and Issue 8 classifications. Our team can help identify suitable LPS 1175 security shutters, steel doors and security grilles for the application. Explore LPS 1175 Issue 7 & Issue 8 Security Ratings Why Choose an Independently Tested Security Product? Independent certification provides something that descriptions such as "heavy duty" or "high security" cannot provide on their own: a defined test standard against which the product's resistance has been assessed. That can be valuable for: Demonstrating specified security performance Satisfying project requirements Comparing suitable security products Supporting insurer requirements where LPS 1175 is specified Giving architects and contractors clearer specification information It also makes it easier to build a layered security strategy around a known level of physical resistance. Frequently Asked Questions What does LPS 1175 mean? LPS 1175 is a Loss Prevention Standard used for assessing the resistance of physical security products to forced entry. Products are subjected to manual attack testing using defined tool categories and attack conditions. What does A1 mean in LPS 1175? Under Issue 8, the letter identifies the applicable threat/tool category and the number identifies the minimum attack delay. An A1 classification therefore combines Category A with a one-minute delay. What does C5 mean? C5 combines the Category C tool/threat level with a five-minute minimum attack delay under the standard's test conditions. What does D10 mean? D10 combines the Category D tool/threat level with a 10-minute minimum attack delay. Is C5 the same as SR3? You may see C5 and SR3 presented together to help customers navigate Issue 8 and legacy Issue 7 product ranges. However, Issue 7 and Issue 8 use different classification structures and should not automatically be considered directly equivalent. Always check the product's certification and project specification. Is LPS 1175 only for roller shutters? No. LPS 1175 applies to a range of intruder-resistant building components and security systems. Security Direct supplies LPS 1175-rated roller shutters, steel security doors and retractable security grilles. Should I choose the highest security rating available? Not automatically. The appropriate rating should be determined by the building's risk assessment, the assets being protected, the likely threat, insurer requirements and the wider security strategy. Need Help Choosing an LPS 1175 Security Rating? Choosing between A1, B3, C5, D10 and E10 can initially seem complicated, particularly when an existing specification also refers to the older SR rating system. Security Direct can help you identify an appropriate security-rated roller shutter, steel door or retractable grille based on your project requirements. Explore our LPS 1175 Issue 7 & Issue 8 range or contact our team to discuss your project. You can also see what customers say about Security Direct through our Feefo reviews and Trustpilot reviews before ordering.
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Retractable Security Grilles for an Office Environment
Protect office windows and doors with retractable security grilles, providing effective physical security while maintaining light, access and appearance.
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How Secure Are Retractable Security Grilles?
Discover how secure retractable security grilles are, what affects their performance and how to choose the right security grille for your home or business.
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Case Study: Window Roller Shutters for Year-Round Shade, Security & Insulation
When most people think about security window shutters, protection against intruders is usually the first benefit that comes to mind. However, for homeowners, modern window roller shutters can offer much more than security alone. For this residential application, the customer wanted a practical way to improve security while also gaining greater control over sunlight, shade, privacy and the comfort of their home throughout the year. With bright sunlight creating excessive glare and heat during warmer periods, and colder weather approaching, made-to-measure metal window shutters provided a versatile solution that could be used differently throughout the seasons. The Challenge: More Than Just Window Security The property had several exposed windows receiving significant direct sunlight during the day. Although this helped create bright living spaces, strong sunshine could also result in glare and unwanted solar heat gain, particularly during the warmer months. Curtains and internal blinds provided some control over the light but didn't prevent the sun from reaching the external surface of the glazing. The homeowner was also conscious of security and privacy, particularly during the darker autumn and winter evenings. Rather than treating each issue separately, they wanted one solution that could provide: Additional window security Greater control over direct sunlight Shade during hot and sunny conditions Increased privacy Reduced exposure of the glazing An additional barrier during colder weather Convenient everyday operation Made-to-measure window roller shutters offered a way of combining these requirements within one system. The Solution: Made-to-Measure Metal Window Shutters The property was fitted with compact metal security shutters for the windows, manufactured specifically for each opening. When completely raised, the shutters allow the windows to function normally and maximise natural daylight. However, one of the particularly useful features for a residential application is that the shutters don't always have to be treated simply as open or closed. They can be positioned according to the conditions and how the room is being used. During bright sunshine, the shutters can be partially lowered to provide shade while still allowing daylight into the property. When greater privacy or security is required, they can be lowered further or completely closed. This gives the homeowner much greater control throughout the day. Using Window Shutters for Sun and Shade External shading can be particularly useful on windows exposed to strong direct sunlight. During warmer periods, lowering the window shutters before or while the sun is directly hitting the glazing can help shade the window. This can make rooms more comfortable and reduce glare on televisions, computer screens and other displays. It also gives homeowners more flexibility than simply closing curtains inside the room. The shutter can be partially lowered according to the position of the sun, allowing the homeowner to balance shade and natural daylight rather than completely darkening the room. For bedrooms, this can also provide excellent light control when a darker environment is preferred. From Summer Shade to Winter Comfort One of the advantages of roller shutters is that their usefulness doesn't disappear when summer ends. As we move into autumn and winter, the way the shutters are used can change. When closed, the shutter creates an additional physical layer outside the window. Depending on the shutter construction and installation, this can contribute to the overall thermal performance of the opening by creating another barrier between the external environment and the glazing. Insulated roller shutter slats can be particularly attractive for residential applications where both security and thermal performance are considerations. However, window shutters should be viewed as one part of the building envelope rather than a replacement for appropriate glazing or building insulation. For this homeowner, the important benefit was versatility: the same shutters used to provide shade during hot, sunny weather could provide privacy, security and an additional protective layer over the windows during colder months. Added Privacy During Darker Evenings Privacy also becomes increasingly important as the evenings become darker. During summer, a brightly lit exterior can make it relatively difficult to see inside a property. In winter, that situation can reverse. Once it is dark outside and lights are switched on indoors, windows can provide a clear view into living spaces from outside. Closing the security window shutters provides complete privacy where solid shutter profiles are used. For ground-floor windows, street-facing rooms and more secluded areas of a property, this can be particularly valuable. The homeowner can therefore lower the shutters in the evening to increase privacy while simultaneously adding another physical security barrier across the window. Security When the Property Is Unoccupied Security remained an important part of the specification. When fully closed, the metal shutters create a physical barrier in front of the windows, helping protect vulnerable glazing and providing a visible deterrent. This can be particularly useful when the property is unoccupied, whether during the working day or when the homeowner is away. Rather than relying solely on the window itself, metal security shutters for windows add another layer that must be overcome before the glazing can be accessed. The appropriate shutter specification will depend on the required level of security. Where a particular security rating is required, an independently tested security shutter should be specified. Convenient Electric Operation For shutters that are going to be adjusted regularly throughout the day, convenience matters. Electric operation allows the homeowner to raise and lower the shutters without manually operating each individual window shutter. This is particularly useful when using them for solar control because the shutter position can be adjusted as conditions change. Depending on the shutter system, different control options may be available, making it possible to create a solution that suits how the property is used. A Window Shutter for Every Season This installation demonstrates why residential metal window shutters shouldn't necessarily be considered purely as a security product. Throughout the year, the homeowner can use the shutters in different ways. Spring and summer: partially lower the shutters to provide shade, control glare and reduce exposure to strong direct sunlight. Autumn and winter: close the shutters for additional privacy, security and another protective layer over the glazing during colder weather. Throughout the year: use the shutters to secure vulnerable windows whenever the property is unoccupied. The result is a window security solution that provides practical benefits far beyond simply protecting the building against attempted entry. Considering Window Roller Shutters for Your Home? Every property is different, so the right window shutter will depend on the size and construction of your windows, the level of security required, where the shutters can be installed and how you intend to use them. At Security Direct, we supply made-to-measure window roller shutters for residential and commercial properties, with different materials, finishes and operating options available. Whether your priority is security, privacy, summer shading or additional protection during the colder months, our technical sales team can help you compare the available options and select a suitable shutter for your property.
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Metal Window Shutters: A Guide to Secure Window Protection
Windows can be one of the most vulnerable points of a property, particularly on ground floors, rear elevations and areas that are less visible from the street. Metal window shutters provide a strong physical barrier across the opening, helping to protect the glass and create a visible deterrent against attempted unauthorised access. Available for commercial, industrial and residential properties, modern security window shutters can be made to measure and manufactured in a range of designs, materials, colours and operating methods. This means security can be improved without necessarily compromising the appearance or everyday use of the building. In this guide, we look at how metal shutters protect windows, the different options available and what you should consider when choosing the right security solution. What Are Metal Window Shutters? Metal window shutters are physical barriers manufactured from materials such as aluminium or steel and installed over a window opening. Unlike decorative window shutters, security shutters use interlocking metal slats that travel vertically within guide rails. When closed, the curtain covers the window to create a robust barrier between the glazing and the outside of the property. When access or visibility is required, the shutter rolls into a compact box above the opening. Depending on the application, shutters can be installed internally or externally and operated either manually or electrically. Why Install Security Window Shutters? The most obvious reason for installing security window shutters is to improve protection against attempted break-ins and vandalism. Glass windows can potentially provide an accessible point of entry into a building. Installing a physical shutter in front of the glazing adds another layer that an intruder must overcome before reaching the window itself. However, security isn't the only potential benefit. Window shutters can also provide: A strong visual security deterrent Protection for vulnerable glazing Increased privacy when closed Protection against vandalism Additional protection from adverse weather Light control and room darkening Potential thermal benefits with certain insulated designs The importance of each benefit will depend on where the shutters are being installed and how the building is used. Steel or Aluminium Window Shutters? One of the main decisions when choosing metal security shutters for windows is whether steel or aluminium is more appropriate. Aluminium Window Shutters Aluminium roller shutters are lightweight, corrosion resistant and well suited to many domestic and commercial window applications. The relatively compact construction makes aluminium particularly useful where space around the window is limited. Insulated aluminium slats are also available for applications where thermal performance, light control and privacy are important considerations alongside security. A choice of powder-coated finishes can help the shutter complement existing windows, doors and building finishes. Steel Window Shutters Steel roller shutters provide a strong and durable solution and are particularly suited to commercial and higher-demand security applications. Depending on the specification, steel shutters can protect shops, offices, warehouses, industrial buildings and other vulnerable premises. Where a specific level of security is required, it is important to consider a shutter with appropriate independent security testing rather than assuming that any steel shutter automatically provides a particular security rating. Internal or External Window Shutters? Window shutters can often be installed either internally or externally, depending on the construction of the opening and the level of protection required. External shutters create a physical barrier before someone can reach the window itself. They can therefore protect both the glazing and the opening against attempted access and vandalism. Internal shutters are installed behind the window. This can provide a more discreet appearance from outside when the shutter is open and may protect the shutter itself from exposure to the weather. Neither arrangement is automatically right for every property. Available fixing surfaces, window operation, security requirements and the appearance of the building should all be considered. Manual or Electric Window Shutters? Smaller metal window shutters can often be operated manually, while larger shutters or shutters that will be opened and closed frequently may benefit from electric operation. Manual options can provide simple and cost-effective operation without requiring a motor or electrical supply. Electric shutters provide convenient operation at the touch of a button and can be combined with different control systems depending on the product. These may include wall switches, key switches or remote controls. For properties with several windows, electric operation can make managing multiple shutters considerably more convenient. Can Window Shutters Still Allow Visibility? Installing a security shutter doesn't necessarily mean completely covering the window with a solid metal curtain. Depending on the required level of security and privacy, different slat designs may be available. Solid shutters provide complete coverage when closed and are appropriate where privacy and physical protection are priorities. Perforated or vision-style shutters can allow a degree of visibility and airflow while still creating a physical barrier across the opening. These designs can be particularly useful for retail and commercial premises where maintaining visibility through a shop window may be desirable. Are Metal Window Shutters Suitable for Homes? Yes. Modern metal shutters aren't limited to shops and industrial buildings. Security window shutters can be used on residential windows where homeowners want an additional physical security measure, particularly for vulnerable ground-floor windows, secluded properties, holiday homes and buildings that may be left unoccupied for extended periods. Domestic shutters are typically designed to be more compact and visually sympathetic than traditional heavy-duty commercial shutters. Choosing an appropriate colour can also help the shutter integrate with existing window frames and exterior finishes. For residential applications, customers may also value benefits such as privacy, light reduction and insulation alongside security. Are Window Shutters Suitable for Commercial Properties? Metal shutters are widely used to secure windows in shops, offices, warehouses and other commercial premises. They can be particularly useful for ground-floor windows containing valuable equipment or stock, as well as windows in less visible parts of a building. For retail premises, the choice between solid and more open shutter designs can be important. A business may want maximum coverage when closed, while another may prefer customers and passers-by to retain some visibility through the window outside trading hours. How Secure Are Metal Window Shutters? The level of security depends heavily on the shutter's complete construction. The material is only one part of the system. Slat design, guide rails, locking arrangements, fixings, shutter size and installation can all influence overall performance. For everyday applications, a standard security shutter may provide an appropriate physical deterrent. Where a building has a higher security risk or an insurer, consultant or specification requires a particular performance level, a security-rated shutter may be necessary. In these situations, look for independently tested products that meet the required security standard rather than relying solely on descriptions such as heavy duty or high security. What Should You Consider Before Buying Window Shutters? Before choosing metal shutters for your windows, consider how you actually need the shutter to perform. Think about the required level of security, whether the shutter will be fitted internally or externally, how frequently it will operate and whether manual or electric operation would be more practical. You should also consider whether you require complete privacy or want to maintain visibility through the opening, along with the available space above and around the window. For made-to-measure shutters, accurate measurements are particularly important. The fixing arrangement and surrounding structure should also be suitable for the proposed shutter. Choosing the Right Metal Security Shutters for Windows There isn't one type of metal security shutter for windows that's suitable for every property. A small domestic window may require a compact aluminium shutter, while a vulnerable commercial opening could require a substantially different security specification. Other customers may prioritise visibility, insulation, appearance or convenient electric operation. The best starting point is therefore to identify what you need the shutter to achieve, rather than selecting a product based solely on material or price. At Security Direct, we offer a range of made-to-measure window shutters for domestic, commercial and industrial applications, with different materials, slat designs and operating options available. If you're unsure which type of security window shutter is appropriate for your property, our technical sales team can discuss your opening and requirements and help you compare the available options.
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Fire Curtain Integrity and Radiation: What This Means?
When specifying fire curtains for a building, you may come across terms such as integrity, radiation and insulation. These classifications describe different aspects of how a fire curtain performs when exposed to fire and can be important when determining which solution is appropriate for a particular application. Understanding the difference is especially important because not all fire curtains provide the same level or type of protection. A curtain may provide excellent fire integrity but have a different performance when it comes to limiting heat radiation. In this guide, we explain fire curtain integrity and radiation, what the different classifications mean and why they matter when choosing a fire curtain. What Is a Fire Curtain? A fire curtain is a specially designed barrier that deploys to help restrict the spread of fire and smoke through a building. Unlike a traditional fire door or fire shutter, a fire curtain can normally remain discreetly housed above an opening until it is required. When activated by the building's fire detection or alarm system, the curtain descends to create a fire-resistant barrier. This makes fire curtains particularly useful in locations where maintaining an open-plan appearance or unrestricted access during normal use is important. Typical applications can include: Shopping centres and retail premises Offices Hotels Schools and universities Hospitals and healthcare environments Apartment buildings Open-plan commercial buildings Doorways, corridors and lift openings However, the required performance of the curtain will depend on the building and its fire strategy. What Does Fire Curtain Integrity Mean? Integrity refers to the ability of the fire curtain to resist the passage of flames and hot gases from the fire side of the barrier to the protected side for a specified period. You may see integrity performance expressed with an E classification followed by a period of time. For example, a fire curtain could have a classification indicating that its integrity has been demonstrated for a particular number of minutes under the relevant test conditions. In simple terms, integrity is concerned with the curtain continuing to act as an effective physical barrier against fire. This is one of the fundamental performance characteristics to consider when specifying a fire curtain. What Does Radiation Mean on a Fire Curtain? Stopping flames from passing through an opening is only part of fire protection. Even when a fire curtain maintains its integrity, significant radiant heat can potentially be transmitted from the fire side of the curtain. Radiation performance relates to the curtain's ability to limit this heat radiation on the protected side. This is important because excessive radiant heat can affect people, combustible materials and escape routes even where flames have not passed through the barrier. A fire curtain with a radiation classification is therefore designed and tested to provide a specified level of protection against radiant heat in addition to maintaining its integrity. Integrity vs Radiation – What's the Difference? The easiest way to understand the difference is to think about what each performance characteristic is protecting against. Integrity (E) relates primarily to preventing flames and hot gases from passing through the fire barrier. Radiation (W) relates to limiting the amount of radiant heat transmitted through the barrier. A curtain can therefore maintain its physical integrity while the temperature and radiant heat on the non-fire side continue to increase. This is why simply asking “How many minutes is the fire curtain rated for?” doesn't always provide enough information. The required classification needs to be considered alongside the specific application and the building's fire strategy. What About Insulated Fire Curtains? You may also encounter an insulation classification, commonly represented by I. Insulation performance goes further than integrity by controlling the temperature rise on the non-fire side of the barrier within defined limits under the applicable test standard. This is different from radiation control, so the terms integrity, radiation and insulation should not be used interchangeably. Depending on the building design and fire strategy, an application may require integrity only or additional radiation or insulation performance. Why Does Radiation Matter? Radiant heat can travel across an area without direct contact with flames. In a severe fire, sufficiently high levels of radiant heat can potentially make areas uncomfortable or unsafe for occupants and may contribute to the ignition of combustible materials. Controlling radiation can therefore be particularly relevant where a fire curtain is being used near: Escape routes Areas occupied by people Combustible materials Building contents Large open spaces Areas requiring separation as part of the fire strategy Whether radiation performance is required should be determined by the building's fire strategy and the relevant fire safety professionals rather than assumed from the application alone. How Long Do Fire Curtains Provide Protection? Fire curtain performance is normally classified according to testing against recognised standards, with performance stated for specified periods. The appropriate duration isn't simply a matter of choosing the curtain with the longest available rating. The required performance should be determined by factors including the building design, location of the curtain and overall fire strategy. When comparing products, it is therefore important to look at the complete fire classification, rather than comparing products solely by the number of minutes shown in their specifications. Fire Curtains, Fire Shutters or Fire Doors? A fire curtain isn't the only way of providing fire separation within a building. Depending on the opening and how it is used, a fire roller shutter may provide a more suitable solution for larger openings where a robust physical shutter is required. For pedestrian access and compartmentation, a steel fire door may be more appropriate. Fire curtains are particularly beneficial where architectural appearance, available space or maintaining an open area during everyday use is important. Choosing between these products should ultimately be based on the building's fire strategy and the required performance rather than appearance or price alone. Choosing the Right Fire Curtain There is no single fire curtain specification suitable for every building. Before selecting a product, it is important to establish the required fire performance, size of the opening, method of activation, installation arrangement and how the curtain will integrate with the building's wider fire safety systems. At Security Direct, we supply a range of fire curtains for different commercial and architectural applications. Our technical sales team can help you understand the available options and identify a suitable product based on your specified requirements. For projects where a particular fire classification is required, always refer to the product's current test evidence, certification and technical documentation and ensure the proposed solution satisfies the project's fire strategy. Need Help Choosing a Fire Curtain? If you're unsure about fire curtain integrity and radiation ratings, speak to our technical sales team before placing an order. We can discuss your opening, required classification and application and help you identify the most appropriate solution from our range of fire protection products.
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BS 8524:2025 – What the New Fire Curtain Standard Means
BS 8524 was updated in November 2025, replacing the previous 2013 editions. Discover what this means for fire curtain testing, certification and installation, and what customers and specifiers should check before selecting a system.
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Choosing the Right Entrance Door for Your Building
Whether you are upgrading an existing property or specifying doors for a new build, selecting the right entrance doors requires careful consideration. From aesthetics to performance, and from traffic levels to security requirements, every detail matters.
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Electric vs. Manual Roller Shutters: Cost & Benefits Explained
Discover the enhanced affordability and benefits of electric roller shutters compared to traditional manual options in our latest guide.
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Roller Shutter Door with Pedestrian Access
Learn about roller shutter doors with pedestrian access. Compare wicket doors vs. separate doors to find the best fit for your security needs.
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