Collection: Fixed Security Grilles

Fixed security grilles are available in several designs depending on the required security level, appearance, and application. They can range from basic deterrent systems to independently tested high-security solutions.

Fixed Bar Grilles

Manufactured from solid steel bars welded into a reinforced frame.

Design options:

• Vertical bar configuration
• Horizontal bar configuration
• Combination layouts

Suitable for: Residential windows, schools, commercial premises, and ground floor openings.

Welded Mesh Security Grilles

Constructed using heavy duty welded steel mesh within a perimeter frame.

Design options:

• Different mesh aperture sizes
• Flat or recessed fixing
• Internal or external installation

Suitable for: Plant rooms, storage areas, utility buildings, and higher-risk sites.

LPS 1175 Security Rated Fixed Grilles (Up to Level 4)

Independently tested by LPCB for graded resistance to forced entry.

• Available in Levels 1–4
• Certification applies to both grille and fixing method

Suitable for: Infrastructure, data centres, commercial premises, and higher-risk environments.

Decorative Fixed Grilles

Steel grilles incorporating decorative bar patterns or shaped detailing.

Suitable for: Residential properties or heritage-style buildings where appearance is important.

Internal vs External Fixed Grilles

• Internal fixed grilles – Installed inside the building envelope for higher level of security.
• External fixed grilles – Installed externally for visible deterrence

Choice depends on risk profile and aesthetic preference.

Fixed security grilles can therefore be specified as bar or mesh systems, standard or LPS-rated, internal or external, providing permanent protection tailored to the level of risk and building design.

Fixed security grilles can be tailored to suit the required security level, building type, and aesthetic preference, while maintaining structural strength and compliance where certification is required.

Security Level Specification

Available as:

• Standard deterrent grilles
• Reinforced high-security systems
• LPS 1175 security-rated grilles (Levels 1–4)

The selected level influences bar thickness, mesh gauge, frame reinforcement, and fixing method.

Bar Design Options

For fixed bar grilles:

• Vertical bar layout (most common)
• Horizontal bar layout
• Square or round bar profiles
• Variable bar spacing
• Decorative or heritage-style patterns

Spacing must comply with security requirements where LPS certification applies.

Mesh Panel Options

For welded mesh grilles:

• Different mesh aperture sizes
• Heavy-duty mesh gauge
• Reinforced perimeter framing
• Flat or recessed installation

Mesh specification affects both visibility and resistance to attack.

Made to Measure Sizing

• Custom-built to exact opening dimensions
• Suitable for rectangular and non-standard window shapes
• Designed to fit masonry, steel, or timber substrates
• Ensures precise fit and structural stability.

Finish & Coating

• Powder-coated finish
• Wide RAL colour range
• Internal/external colour options
• Corrosion-resistant finishes for exposed environments

Allows coordination with window frames or façade design.

Installation Method

• Face-fixed (onto the wall surface)
• Reveal-fixed (within the window recess)
• Internal or external mounting

Fixing detail may vary depending on security level and structural conditions.

Fixing & Anti-Tamper Options

• Anti tamper fixings
• Concealed fixings
• Security rated anchor systems (for LPS 1175 grilles)

Fixing method is critical for maintaining certified performance.

Fixed security grilles can therefore be customised in design, finish, security rating, and installation method, from simple protective bars to high-security, independently tested systems up to LPS 1175 Level 4.

Fixed security grilles are specified where permanent physical protection is required for windows or openings, particularly where there is no need for regular access or operation.

Residential Properties

Installed to protect:

• Ground floor windows
• Basement windows
• Side and rear windows
• Vulnerable access points

Often used as a visible deterrent and physical barrier against opportunist intrusion.

Commercial Buildings

Used on:

• Office windows
• Rear service areas
• Storage rooms
• Ground-level glazing

Provides long-term protection with minimal maintenance.

Schools & Public Buildings

Fitted to:

• Classrooms
• IT suites
• Sports halls
• Community centres

Helps reduce vandalism and protect valuable equipment.

Industrial & Warehouse Facilities

Installed to secure:

• Plant rooms
• Machinery enclosures
• Stock rooms
• Loading bay windows

Security-rated systems may be specified in higher-risk environments.

Utilities & Infrastructure

Used to protect:

• Substations
• Telecom buildings
• Water treatment sites
• Energy centres

Often specified to LPS 1175 Levels 2–4 for enhanced security.

Communal & Residential Developments

Installed in:

• Bin stores
• Plant enclosures
• Basement windows
• Car park areas

Provides durable protection with low maintenance requirements.

Fixed security grilles are ideal for applications where a robust, permanent security solution is required without the need for retractable or removable functionality, offering protection across residential, commercial, industrial, and infrastructure environments.

Fixed security grilles provide a permanent, heavy-duty solution for protecting windows and vulnerable openings. With no moving parts, they offer long-term durability and reliable security performance.

Permanent Physical Protection

Manufactured from solid steel bars or welded mesh panels, securely anchored to the structure.

Benefit:Creates a robust barrier against unauthorised access and forced entry.

LPS 1175 Security Rated Options (Up to Level 4)

Available with independent certification for graded attack resistance.

Benefit:Provides measurable, third-party verified protection suitable for higher-risk environments.

Heavy Duty Steel Construction

Reinforced frames and anti-tamper fixings.

Benefit:High impact resistance and long service life in demanding locations.

Maintains Light & Ventilation

Open bar or mesh construction allows airflow and natural light to pass through.

Benefit:Improves security without creating a fully enclosed or darkened space.

Low Maintenance

No moving parts or mechanical components.

Benefit:Minimal servicing requirements and reduced long-term maintenance costs.

Custom Finishes

Available in powder-coated finishes across a wide RAL colour range.

Benefit:Can match window frames or façade design for a discreet or coordinated appearance.

Made to Measure Construction

Custom-built to fit specific openings.

Benefit:Ensures precise fit and maximises structural strength.

Suitable for a Wide Range of Applications

Ideal for residential, commercial, education, industrial, and infrastructure environments.

Benefit:Scalable security solution from basic deterrent protection to certified high-security systems.

Fixed security grilles deliver a durable, cost-effective, and long-term security solution where permanent protection is required, with options available from standard bar designs to independently tested LPS 1175 Level 4 systems.

Fixed security grilles must meet relevant security certification, fire safety, building regulation, and structural safety requirements, depending on where they are installed and the level of protection specified.

LPS 1175 Security Certification (Where Specified)

For high-security applications, fixed grilles can be certified to:

• LPS 1175 Levels 1–4
• Independently tested by LPCB (Loss Prevention Certification Board)
• Certification applies to the grille design and fixing method

Installation must follow the approved fixing detail. Any modification can invalidate certification.

Fire Safety & Means of Escape (Approved Document B)

If installed over windows that:

• Form part of an escape route
• Provide emergency egress
• Are required for firefighting access

The grille must not obstruct safe escape.In residential settings, windows designated as escape windows must remain usable. Fixed grilles may require internal release or alternative escape provision.

Accessibility Requirements (Approved Document M)

Where grilles are installed along accessible routes:

• Must not reduce compliant escape widths
• Must not create protrusions or hazards

Installation should avoid creating trip or impact risks

Structural Safety & Installation

• Must be securely fixed into structural substrate (brick, concrete, steel)
• Fixings must be suitable for the building fabric
• Installation must resist leverage and attack
• No reliance on non-structural finishes

For LPS-rated systems, fixing must match tested configuration.

Workplace Safety Considerations

In commercial environments:

• Installation must not create sharp edges
• Staff must understand locking arrangements
• Grilles must not obstruct emergency hardware on doors

External Performance

For externally installed grilles:

• Corrosion resistant finishes required
• Fixings must be weather resistant
• Structural integrity must be maintained in exposed environments

When correctly specified and installed, fixed security grilles can meet graded security certification requirements while maintaining compliance with fire safety, accessibility, and structural safety standards

Fixed security grilles must be installed securely to ensure long-term structural integrity and, where specified, maintain compliance with LPS 1175 security certification.

Installation Requirements

Structural Fixing

• Must be securely fixed into structural substrate (brick, block, concrete, or structural steel)
• Correct anchor type and fixing centres must be used
• Opening must be structurally sound
• No reliance on render, cladding, or non-structural finishes

For LPS 1175 rated grilles (Levels 1–4), installation must match the tested fixing detail.

Alignment & Positioning

• Grille must be level and square
• Minimal gaps between grille and substrate
• Fixings should be concealed or anti-tamper where required
• Bar spacing must match approved specification (for certified systems)

Incorrect alignment can reduce both security performance and aesthetic finish.

Anti Tamper Measures

• Use of security-rated fixings where required
• Fixings protected from external access
• Welds and joints fully finished
• Critical for maintaining security performance in higher-risk environments.

Escape & Fire Considerations

Where installed over windows or openings that may form part of an escape route:

• Must not obstruct designated escape windows
• Alternative compliant escape provision must be confirmed
• Grilles must not interfere with emergency access requirements

Life safety compliance takes priority.

Supply Only Considerations

If supplied without installation:

• Installer assumes responsibility for structural suitability
• Installation must follow technical drawings precisely
• LPS certified systems must be installed to approved fixing detail

Professional installation is recommended for certified security systems.

Maintenance Requirements

Fixed security grilles are low maintenance due to their static design, but periodic inspection is important.

Routine Inspection (Recommended Annually)

Check for:

• Secure fixings
• Frame stability
• Signs of corrosion
• Damage or bending of bars or mesh
• Integrity of welds

Higher-risk or coastal environments may require 6 monthly inspections.

External Maintenance

• Inspect powder-coated finish
• Touch up any chips or damage
• Check for rust or corrosion
• Ensure fixings remain secure

Security Performance Checks

For LPS rated grilles:

• Confirm no unauthorised modifications
• Inspect fixings and anchorage
• Replace damaged components promptly

When correctly installed and periodically inspected, fixed security grilles provide long-term, reliable protection with minimal ongoing maintenance requirements while maintaining compliance with applicable security and safety standards.

(Indicative UK pricing – excludes VAT unless stated)The cost of fixed security grilles depends on size, bar or mesh specification, security level (standard or LPS 1175 rated), finish, and installation conditions.

Standard Fixed Bar Grilles

Suitable for residential and low–medium risk commercial applications.

• Supply only: From £150 – £300 per window
• Supplied and installed: From £300 – £600 per window

Based on a typical ground floor window up to approx. 1200mm x 1200mm.

Standard Fixed Mesh Grilles

Welded steel mesh within reinforced perimeter frame.

• Supply only: From £200 – £400 per opening
• Supplied and installed: From £400 – £750 per opening

Mesh gauge and aperture size will affect price.

LPS 1175 Security Rated Fixed Grilles (Levels 1–4)

Independently tested for graded attack resistance.

Level 1–2

• Supply only: From £500 – £900 per window
• Supplied and installed: From £800 – £1,400 per window

Level 3–4

• Supply only: From £800 – £1,500+ per window
• Supplied and installed: From £1,200 – £2,500+ per window

Higher levels require reinforced framing and certified fixing methods.

Larger Commercial or Industrial Openings

For larger plant room or warehouse windows:

• Installed from £900 – £3,000+ per opening(depending on size and security level)

What Affects Final Pricing

• Window or opening size
• Bar vs mesh design
• Security level (standard vs LPS 1175 Level 1–4)Powder-coated finish
• Internal vs external installation
• Structural substrate condition
• Site access and installation complexity

Getting an Accurate Quote

Fixed security grilles are made to measure, and pricing depends on exact opening dimensions and required security rating. A site survey is recommended to confirm structural fixing suitability, escape compliance, and final installation cost.