Window Security Bars
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Mesh Window Guards
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Retractable Security Grille - High Security
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Retractable Security Grille - LPS1175 Level 1
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Insurance Approved - Level 3 Retractable Security Grille
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Insurance Approved - Level 2 Retractable Security Grille
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Fire Exit Folding Grille
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What are Commercial Security Grilles?
Commercial security grilles are steel barrier systems designed to secure windows, doors, and internal openings in business premises, public buildings, and industrial facilities. They provide a physical layer of protection against forced entry and vandalism while maintaining visibility, airflow, and operational flexibility.
Unlike solid roller shutters, commercial grilles use open vertical bars or welded mesh construction, allowing natural light and sightlines to remain unobstructed. This makes them particularly suitable for retail environments and buildings where visibility is important.
Commercial security grilles are typically manufactured from:
- Heavy duty steel bars
- Welded steel mesh panels
- Reinforced perimeter frames
- Anti tamper fixings and security rated locking systems
They are available in several formats, including:
- Fixed window and door grilles
- Retractable (sliding or bi-parting) grilles
- Trackless barrier systems
- LPS 1175 security-rated systems (Levels 1β4)
Commercial Security Grille Information and Buying Guide
Types of Commercial Security Grilles
Types of Commercial Security Grilles
Commercial security grilles are available in several formats depending on the required security level, performance and operational flexibility. Our range covers both standard deterrent solutions and independently tested high security systems tested to LPS1175.
Fixed Window Bars
Permanently installed steel bar grilles fixed directly to the building structure.Suitable for:
- Ground floor windows
- Basements
- Vulnerable access points
Provides strong physical protection with minimal moving parts.
Removable Window Bars
Steel bar systems designed to be removed internally when required.
Suitable for:
- Commercial properties
- Escape windows
- Locations requiring occasional access
Offers security while maintaining emergency access flexibility.
LPS 1175 Security Rated Window Bars (Up to Level 4)
Independently tested by LPCB to provide graded resistance to forced entry.
- Available up to LPS 1175 Level 4
- Certification applies to the complete installation
Suitable for higher risk commercial and infrastructure applications.
Security Mesh Grilles (Up to LPS 1175 Level 4)
Heavy-duty welded steel mesh panels providing strong resistance to attack.
- Available in standard or certified LPS 1175 configurations
- Tested up to Level 4
Ideal where smaller aperture protection is required.
Retractable Security Grilles (Up to LPS 1175 Level 3)
Collapsible lattice systems that slide open when not in use.
- Fully tracked or trackless systems
- Available up to LPS 1175 Level 3
Suitable for retail shopfronts, internal compartmentation, and wider openings.
Commercial security grilles can therefore be specified as fixed, removable, retractable, mesh, or security rated systems with options ranging from visual deterrent protection to independently tested high security solutions up to LPS 1175 Level 3.
Design & Customisation
Design & Customisation
Commercial Security grilles can be tailored to suit the required security level, building type, and aesthetic preference, while ensuring structural strength and compliance where certification is required.
Security Level Specification
Available as:
- Standard deterrent grilles
- LPS 1175 security rated systems
- Window bars and mesh grilles up to Level 3
- Retractable grilles up to Level 3
The chosen level influences bar thickness, mesh gauge, fixing method, and reinforcement.
Bar & Mesh Design Options
Window Bars
- Vertical bar design
- Horizontal bar design
- Decorative bar layouts (where suitable)
- Internal or external fixing
Mesh Grilles
- Welded steel mesh panels
- Different mesh apertures
- Reinforced perimeter frames
Design must remain within certified scope for LPS rated systems.
Retractable Grille Configuration
- Single stack (one-way opening)
- Bi-parting (meeting in the centre)
- Fully tracked (top and bottom track)
- Trackless systems (no bottom track)
Allows adaptation to narrow openings or wide shopfronts.
Removable & Hinged Options
- Internal quick-release removable bars
- Hinged grille panels
- Lockable removable sections
Useful where access or emergency escape flexibility is required.
Finish & Appearance
- Polyester powder coated finish
- Wide RAL colour range
- Match to window frames or building faΓ§ade
- Internal/external colour options
Suitable for both residential and commercial environments.
Made to Measure Sizing
- Custom built to structural opening
- Suitable for irregular window shapes
- Designed for masonry, steel, or timber substrates
Locking Options
- Keyed locking systems
- Multi-point locking (where applicable)
- Security rated cylinders
Lock selection must match certified configuration for LPS1175 systems.
Commercial Security grilles can therefore be customised in design, finish, configuration, and security level, from simple fixed bars to independently tested high security systems, while ensuring performance remains aligned with the required risk level.
Applications
Applications
Commercial security grilles are installed wherever business premises require physical protection without fully enclosing the space. They are suitable for both external perimeter security and internal compartmentation.
Retail Premises
Installed on:
- Shopfront doorways
- Internal mall entrances
- Display windows
- Stockroom access points
Retractable grilles allow trading visibility during the day and secure closure after hours.
Office Buildings
Used to secure:
- Ground floor windows
- Rear service doors
- Reception areas
- Server or IT rooms
Provides after-hours protection without blocking natural light.
Schools & Public Buildings
Fitted to:
- Classrooms
- IT suites
- Sports halls
- Community centres
Helps prevent vandalism and protect equipment.
Industrial & Warehouse Facilities
Installed across:
- Loading bay doors
- Warehouse windows
- Plant rooms
- Machinery enclosures
Trackless or heavy duty systems are often specified for wider openings.
Utilities & Infrastructure
Specified for:
- Substations
- Telecom buildings
- Water treatment facilities
- Energy centres
Often installed as LPS 1175 security rated systems (Levels 2β4) where graded protection is required.
Internal Compartmentation
Used internally to secure:
- Stockrooms
- Archive rooms
- Cash offices
- Service corridors
Maintains airflow while restricting unauthorised access.
Multi Occupancy & Communal Areas
Installed in:
- Car park entrances
- Bin stores
- Basement service rooms
Provides durable, low-maintenance security in shared environments.
Commercial security grilles are therefore adaptable across retail, office, education, industrial, and infrastructure settings, offering scalable protection from standard deterrent systems to independently tested high security solutions.
Features & Benefits
Features & Benefits
Commercial security grilles provide a practical and durable method of protecting vulnerable openings while maintaining visibility and ventilation. They are available from standard deterrent systems through to independently tested high security solutions to LPS1175.
Physical Intrusion Protection
Manufactured from steel bars, reinforced frames, or welded mesh panels.
Benefit:Creates a strong physical barrier that resists opportunist and, where specified, deliberate forced entry.
LPS 1175 Security Rated Options
- Window bars and mesh grilles available up to LPS 1175 Level 4
- Retractable grilles available up to Level 3
Benefit:Provides independently tested, graded security performance suitable for higher-risk environments.
Maintains Visibility & Airflow
Open bar and mesh construction allows light and ventilation to pass through.
Benefit:Protects the property without blocking natural light or creating a βboarded upβ appearance.
Fixed, Removable, or Retractable Options
Available as:
- Permanently fixed grilles
- Internally removable bars
- Sliding retractable systems
Benefit:Flexibility to suit operational and escape requirements.
Custom Finishes
Available in powder-coated finishes across a wide RAL colour range.
Benefit:Can match window frames or building faΓ§ade for a discreet or coordinated appearance.
Made to Measure Construction
Custom built to fit specific openings.
Benefit:Ensures precise fit and structural strength for non-standard window or door sizes.
Durable & Low Maintenance
Heavy duty steel construction with corrosion resistant finishes.
Benefit:Long service life with minimal maintenance requirements.
Compatible with Escape & Safety Requirements
Removable or fire exit compatible systems available where required.
Benefit:Maintains life safety compliance while providing security.
Commercial security grilles offer a cost effective, scalable security solution, from simple deterrent protection to certified high security systems, while preserving visibility, airflow, and architectural integrity.
Compliance & Safety
Compliance & Safety
Commercial security grilles must meet relevant security certification standards, fire safety requirements, escape regulations, and building regulations, depending on how and where they are installed.
Security Certification (Where Specified)
- LPS 1175 (Levels 1β4)Independently tested by LPCB (Loss Prevention Certification Board)
- Graded resistance to forced entry
- Certification applies to the complete grille system and fixing method
- Installation must follow approved fixing detail
- No unauthorised modifications permitted
Required in higher risk commercial, infrastructure, or insurer driven applications.
Fire Safety & Escape Compliance
If security grilles protect openings that form part of an escape route:
- Must not obstruct compliant means of escape
- Removable systems must allow internal release
- Fire exit grilles must not reduce required escape width
Must work alongside doors fitted with hardware compliant to:
- BS EN 1125 (panic hardware)
- BS EN 179 (emergency exit devices)
Security must never compromise life safety.
Building Regulations (England & Wales)
- Approved Document B β Fire Safety
- Escape routes must remain safe and usable
- Windows required for emergency escape must remain operable
- Grilles must not compromise compartmentation
- Approved Document M β Access to and Use of Buildings
- Bottom tracks must not create trip hazards
- Accessibility and threshold compliance must be maintained
Trackless systems may be required in accessible routes.
Structural & Installation Safety
- Must be securely fixed into structural substrate
- Fixings must be appropriate for masonry, steel, or timber
- Installation must prevent leverage points
- No sharp edges or unsafe protrusions
For LPS1175 security rated systems, installation must match certified detail.
Workplace Safety Considerations
In commercial settings:
- Staff must be trained in safe operation
- Locking procedures should be controlled
- Emergency release procedures must be understood
External Performance
Where installed externally:
- Corrosion resistant finishes required
- Fixings must be weather resistant
- Structural suitability must be confirmed
When correctly specified and installed, commercial security grilles can meet graded security certification requirements while maintaining compliance with fire safety, escape regulations, accessibility standards, and structural safety principles.
Installation & Maintenance
Installation & Maintenance
Commercial security grilles must be correctly installed to ensure structural integrity, smooth operation (where movable), and where specified, compliance with security certification such as LPS 1175 Levels 1β4.
Installation Requirements
Structural Fixing
- Must be securely fixed into structural substrate (brick, block, concrete, or structural steel)
- Correct fixing centres and anchor types must be used
- Opening must be square and structurally sound
- No reliance on non-structural finishes for load support
For LPS 1175 rated grilles, installation must match the certified fixing specification.
Fixed & Mesh Grilles
- Frame must be level and plumb
- Anti-tamper fixings should be used
- Fixings concealed or protected where required
- Perimeter gaps must be minimised
- Incorrect fixing can significantly reduce security performance.
Removable Grilles
- Internal release mechanism must function correctly
- Locking system must engage fully
- Removal process must be simple but secure
- If protecting escape windows, internal release must remain unobstructed.
Retractable Grilles
- Top track securely fixed to structural head
- Bottom track (if fitted) aligned and fixed accurately
- Trackless systems require precise side guide alignment
- Grille must slide freely without binding
LPS-rated retractable systems must follow approved fixing detail.
Escape & Fire Route Considerations
Where grilles protect escape openings:
- Must not reduce required escape width
- Must allow immediate internal release (if applicable)
- Must not obstruct compliant emergency exit hardware
- Life safety must take priority over security.
Supply Only Considerations
If supplied without installation:
- Installer assumes responsibility for structural suitability
- Installation must follow manufacturer technical drawings
- Certified systems must be installed to approved fixing details
Professional installation is recommended for security rated systems.
Maintenance Requirements
Security grilles are low maintenance but require periodic inspection to ensure continued performance and safety.
Routine Inspection (Recommended Annually or 6-Monthly in Commercial Settings)
Check for:
- Secure fixings
- Frame stability
- Lock engagement
- Signs of corrosion
- Damage or deformation
- Mesh or bar integrity
Higher risk sites may require quarterly checks.
Cleaning & Lubrication (Retractable Systems)
- Keep tracks free from debris
- Lightly lubricate pivot points and locks
- Avoid over lubrication
Lock & Hardware Maintenance
- Inspect cylinders and locking mechanisms
- Replace worn components promptly
- Ensure internal release mechanisms function correctly
External Maintenance
- Inspect powder coated finish
- Check for corrosion
- Maintain protective coatings where necessary
When correctly installed and routinely maintained, commercial security grilles provide long-term, reliable protection while remaining compliant with security certification, fire safety, and building regulation requirements.
Price Guide
Price Guide
(Indicative UK pricing β excludes VAT unless stated)
The cost of commercial security grilles depends on type (fixed, removable, mesh, retractable), security level (standard or LPS 1175 rated), size of opening, and installation conditions.
Fixed Window Bars (Standard)
Suitable for residential and lowβmedium risk applications.
- Supply only: From Β£180 β Β£350 per window
- Supplied and installed: From Β£350 β Β£650 per window
Typical small ground-floor window.
Removable Window Bars
Internal removable systems for added flexibility.
- Supply only: From Β£250 β Β£450 per window
- Supplied and installed: From Β£450 β Β£800 per window
Pricing depends on release mechanism and locking system.
LPS 1175 Security Rated Window Bars (Up to Level 4)
Independently tested high-security systems.
- Supply only: From Β£600 β Β£1,200 per window
- Supplied and installed: From Β£900 β Β£1,800 per window
Cost varies depending on security level (Level 1β4) and opening size.
Security Mesh Grilles
Standard Mesh Grilles
- Supply only: From Β£220 β Β£400 per window
- Supplied and installed: From Β£400 β Β£750 per window
LPS 1175 Rated Mesh (Up to Level 4)
- Supply only: From Β£750 β Β£1,500 per opening
- Supplied and installed: From Β£1,100 β Β£2,200+ per opening
Retractable Security Grilles (Up to LPS 1175 Level 3)
Priced by metre width:
- Standard retractable installed: From Β£850 β Β£1,200 per metre width
- LPS Level 1β3 installed: From Β£1,200 β Β£3,000 per metre width
- A typical 2m wide shopfront grille:Installed from Β£1,800 β Β£4,500+
What Affects Final Pricing
- Security level (standard vs LPS 1175 Level 1β4)
- Window or opening size
- Fixed vs removable vs retractable
- Powder-coated finish
- Installation access
- Structural substrate condition
- Fire escape or internal release requirements
Getting an Accurate Quote
Commercial 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.
Quick Quotes
Whether you get a quote online or through contacting our team, you'll be sure to receive your quote promptly.
Price Transparency
Fair pricing ensures you know exactly what youβre paying for, with no hidden costs or markups. Trade enquiries welcome.
Supply & Installation
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Frequently Asked Questions - Commercial Security Grilles
Are commercial security grilles as secure as roller shutters?
Are commercial security grilles as secure as roller shutters?
Commercial security grilles provide strong physical protection while maintaining visibility and airflow. For higher-risk sites, systems can be specified to LPS 1175 security ratings (Levels 1β4), offering independently tested resistance to forced entry.
Can commercial security grilles be used on fire exit doors?
Can commercial security grilles be used on fire exit doors?
Yes, but they must not obstruct emergency escape. If protecting a door on a means of escape route, the grille must allow immediate internal release and must not interfere with panic hardware compliant with BS EN 1125 or BS EN 179. Our Fire Exit folding grille is designed for Fire Exit Doors.
Do security grilles block visibility into a shop?
Do security grilles block visibility into a shop?
No. Mesh and lattice designs maintain clear sightlines, making them ideal for retail premises where product visibility is important outside trading hours.
Are trackless security grilles available?
Are trackless security grilles available?
Yes. Trackless systems eliminate the need for a bottom floor track, reducing trip hazards and making them suitable for loading bays, accessible routes, and public areas.
What maintenance do commercial security grilles require?
What maintenance do commercial security grilles require?
Fixed grilles require minimal maintenance beyond periodic inspection of fixings and finish condition. Retractable systems should be inspected regularly to ensure smooth operation, track alignment, and correct lock engagement, particularly in high-use environments.

