Window Security Bars
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Mesh Window Guards
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Removable Window Bars
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Safety Window Bars
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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 2 Retractable Security Grille
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Insurance Approved - Level 3 Retractable Security Grille
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Safety Window Barriers
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What are Window Grilles?
Window grilles are steel barrier systems installed over windows to provide protection against unauthorised access and vandalism. They create a physical obstruction across the window opening while still allowing natural light and airflow to pass through.
Unlike solid shutters, window grilles maintain visibility and do not fully enclose the opening. They are typically manufactured from:
- Solid steel bars
- Welded steel mesh panels
- Reinforced perimeter frames
Window grilles can be supplied as:
- Fixed grilles for permanent protection
- Removable systems for added flexibility
- Retractable grilles for operational access
- Security rated systems tested to LPS 1175 (Levels 1โ4) for higher-risk applications
They are commonly used in residential properties, schools, offices, industrial buildings, and infrastructure sites where window security is required without blocking light or ventilation.
In summary, window grilles provide a durable and adaptable solution for securing vulnerable glazing while maintaining building usability and appearance.
Window Grille Information and Buying Guide
Types of Window Grilles
Types of Window Grilles
Window grilles are available in several formats depending on the
required security level, permanence, and operational flexibility. Our
range covers both standard deterrent solutions and independently tested
high security systems.
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:
- Residential 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
- Secured by Design
- Certification applies to the complete installation
Suitable for higher risk commercial and infrastructure applications.
Security Mesh Grilles (Up to LPS 1175 Level 3)
Heavy-duty welded steel mesh panels providing strong resistance to attack.
- Available in standard or certified LPS 1175 configurations
- Tested up to Security Level 3
- Security By Design
Ideal where smaller aperture protection is required.
Retractable Security Window 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
- Secured by Design
Suitable for retail shopfronts, internal compartmentation, and wider openings.
Louvred or Ventilated Grilles
Designed to provide airflow while maintaining security.
- Common in plant rooms and service areas.
Window 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
Window 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 LPS1175 security rated systems.
Retractable Window 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 faรงade
- 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.
Window 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
Window grilles are used wherever windows present a security risk, particularly at ground level or in exposed locations. They provide a physical barrier while maintaining light and ventilation.
Residential Properties
Installed on:
- Ground floor windows
- Basement windows
- Rear and side elevations
- Alleyway-facing glazing
Provides protection against opportunist intrusion while preserving natural light.
Commercial Buildings
Used to secure:
- Office windows
- Rear service areas
- Storage rooms
- Ground level glazing
Offers after hours protection without fully enclosing the space.
Schools & Educational Buildings
Fitted to:
- Classrooms
- IT suites
- Sports halls
- Community facilities
Helps reduce vandalism and protect valuable equipment.
Industrial & Warehouse Facilities
Installed on:
- Plant rooms
- Machinery enclosures
- Warehouse windows
- Service yards
Heavy duty or security rated grilles may be specified in higher risk areas.
Utilities & Infrastructure
Used to protect:
- Substations
- Telecom buildings
- Water treatment facilities
- Energy centres
Often specified to LPS 1175 Levels 2โ4 where graded security is required.
Communal & Multi Occupancy Buildings
Installed in:
- Apartment blocks
- Bin stores
- Basement areas
- Shared service rooms
Provides long term, low-maintenance security.
High Risk & Data Environments
Specified where insurers or risk assessments require certified protection.
Security-rated window grilles can be tested to LPS 1175 Levels 1โ4 for enhanced protection.
Window grilles are therefore suitable across residential, commercial, education, industrial, and infrastructure applications, offering scalable protection based on the level of risk and operational requirements.
Features & Benefits
Features & Benefits
Window 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.
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 โboarded upโ 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 faรงade for a discreet or coordinated appearance.
Made to Measure Construction
Custom built to fit specific window openings.
Benefit:Ensures precise fit and structural strength for non standard window 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.
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
Window 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 1โ3)
- Independently tested by LPCB (Loss Prevention Certification Board)
- Secured by Design
- 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
Security must never compromise life safety.
Building Regulations (England & Wales)
- Approved Document B โ 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 โ 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 LPS 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, 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
Window 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 1โ3.
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, 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 โ excludes VAT unless stated)
The cost of 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 lowโmedium risk applications.
- Supply only: From ยฃ180 โ ยฃ350 per window
- Supplied and installed: From ยฃ350 โ ยฃ650 per window
Typical small ground-floor window.
Removable Window Bars
Internal removable systems for added flexibility.
- Supply only: From ยฃ250 โ ยฃ450 per window
- Supplied and installed: From ยฃ450 โ ยฃ800 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 ยฃ600 โ ยฃ1,200 per window
- Supplied and installed: From ยฃ900 โ ยฃ1,800 per window
Cost varies depending on security level (Level 1โ4) and opening size.
Security Mesh Grilles
Standard Mesh Grilles
- Supply only: From ยฃ220 โ ยฃ400 per window
- Supplied and installed: From ยฃ400 โ ยฃ750 per window
LPS 1175 Rated Mesh (Up to Level 4)
- Supply only: From ยฃ750 โ ยฃ1,500 per opening
- Supplied and installed: From ยฃ1,100 โ ยฃ2,200+ per opening
Retractable Security Grilles (Up to LPS 1175 Level 3)
Priced by metre width:
- Standard retractable installed: From ยฃ850 โ ยฃ1,200 per metre width
- LPS Level 1โ3 installed: From ยฃ1,200 โ ยฃ3,000 per metre width
- A typical 2m wide shopfront grille:Installed from ยฃ1,800 โ ยฃ4,500+
What Affects Final Pricing
- Security level (standard vs LPS 1175 Level 1โ3)
- 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
Window 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 youโre paying for, with no hidden costs or markups. Trade enquiries welcome.
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Frequently Asked Questions - Window Security Grilles
Do window grilles stop burglaries?
Do window grilles stop burglaries?
Window grilles create a strong physical barrier that significantly increases resistance to forced entry. For higher risk applications, grilles can be specified to LPS 1175 security ratings (Levels 1โ4), providing independently tested protection.
Will window grilles block light or ventilation?
Will window grilles block light or ventilation?
No. Bar and mesh designs allow natural light and airflow to pass through the opening. They provide security without fully enclosing or darkening the space.
Can window grilles be installed internally as well as externally?
Can window grilles be installed internally as well as externally?
Yes. Window grilles can be fitted internally for a more discreet appearance or externally to provide a visible deterrent. The choice depends on security requirements and aesthetic preference.
Do window grilles affect fire escape windows?
Do window grilles affect fire escape windows?
They must not obstruct designated escape windows unless alternative compliant escape provision exists. Where windows form part of a means of escape, installation must comply with Approved Document B and life safety requirements.
Are window grilles low maintenance?
Are window grilles low maintenance?
Yes. Fixed window grilles have no moving parts and require minimal maintenance. Periodic inspection of fixings, frame stability, and coating condition is recommended, particularly in exposed environments.

