SR1 and SR2 Certified Security Mesh
Woven Wire Security Mesh Tested to LPS 1175 and Made in the UK and Ireland
Security Mesh Panels Woven and Certified by Graepels
Security mesh is a high strength woven wire mesh made to resist forced entry while letting air, light and sightlines through. At Graepels, we weave security mesh at our own works in the UK and Ireland and supply it as framed panels certified to SR1 and SR2 under LPS 1175, the LPCB standard for physical security products. Testing was carried out independently by BRE, so the rating on the certificate does not rest on our word.
Our SR1 and SR2 rated mesh is woven in stainless steel and supplied framed, welded or bolted, ready to fix into perimeter fencing, gates, enclosures, window and door grilles and plant screens. We also weave non-rated security mesh in a wider range of materials where a certified rating is not required.
Security Wire Mesh Tested by BRE
An LPS 1175 rating is earned under attack, not on paper. BRE tests the framed panel against a defined set of tools for a set attack time, and the product only passes if the attackers fail to make an opening. The video shows our woven security mesh under that kind of test, and the images are from the testing that awarded the SR1 and SR2 ratings.
Independent certification matters because it takes the judgement out of specification. A security consultant, insurer or facilities manager can match the rating on our certificate to the risk assessment for the site without having to take a manufacturer's claims on trust. It also means every panel we supply to that rating is made to the same tested specification.
SR1 and SR2 Security Mesh Ratings
LPS 1175 grades products by the level of attack they withstand, starting at SR1 and rising with the range of tools and the time the attacker is given. Our woven security mesh holds two of those ratings, SR1 and SR2, which between them cover most perimeter, enclosure and building line work in the UK and Ireland.
The right one for your site depends on the asset being protected and the risk assessment behind the specification.
Both ratings are woven in stainless steel and supplied as framed panels, as tested. If your risk assessment does not state a rating, tell us what is being protected and we will advise.
How We Make Security Mesh
Every security mesh panel is woven, framed and welded at our own works before it leaves for site.
Weaving and Welding of Woven Wire Mesh
Stainless steel wire is crimped and woven on our own looms to the pattern tested for the rating. The mesh is then welded so the weave is locked before it goes for framing.
Security Mesh Framed and Welded
Each panel is cut to size and welded into a steel frame, which is the form the SR1 and SR2 ratings were tested on. Bolted assemblies are available where a panel has to be removable.
End Application
Framed panels arrive ready to fix to the structure at close centres with tamper-proof fasteners, whether as fencing infill, an enclosure wall, a grille or a plant screen.
Applications of Our SR1 & SR2 Security Mesh
✅ Utilities and critical infrastructure
✅ Data centres and server rooms
✅ Prisons, detention centres, and police facilities
✅ Retail, commercial, and banking sites
✅ Government and defence installations
✅ Transportation hubs and airports
Benefits of Choosing Graepels’ Security Mesh
✅ Independently tested and certified (BRE, LPS 1175)
✅ Durable, long-lasting materials
✅ Resistant to cutting, prying, and forced entry
✅ Customisable solutions for complex projects
✅ Trusted by architects, contractors, and security professionals
Security Mesh Specifications
Mesh openings range from fine to large and open, and wire diameters are available in standard sizes. For SR1 and SR2 both are fixed by the rating, so the panel you receive matches the panel that was tested. For non-rated security mesh we advise on opening and wire diameter from the load, the risk and the use. Panels are made to size for the opening.
Materials
While SR1 and SR2 rated mesh is stainless steel only, the following materials can also be woven to specification:
Stainless steel (304, 316), high tensile steel, mild steel, galvanised steel, aluminium, copper, brass, bronze, special alloys on request.
The material sets corrosion resistance, strength, flexibility and the finishes available, so tell us where the panel will be installed and we will recommend one.
Weave type is chosen to suit the application. We weave single crimp, double crimp, lock crimp and flat top, and each gives a different level of rigidity and a different surface. For rated mesh the crimp is part of the tested specification.
Panels can be supplied raw, powder coated, galvanised or painted. Cutting, welding, forming and framing are all carried out in house, so you receive ready to install components rather than loose mesh.
Get In Touch About Security Mesh and Security Perforated Metal
Send us the opening sizes, the rating your risk assessment calls for and the fixing details, and we will come back with a specification, a price and a lead time. If the project also needs non-rated mesh, security perforated metal or enclosures, we can supply those alongside it.
Frequently Asked Questions
What Does Security Mesh Do?
Security mesh blocks unauthorised access while letting air, light and sightlines through. It resists cutting, prising and climbing, so it slows or stops forced entry at windows, doors, fencing and enclosures. At Graepels we supply perforated and woven security mesh for data centres, substations, retail units and custodial buildings, protecting the perimeter while keeping the space open.
What Is Security Mesh Made Of?
Security mesh is usually made from steel, stainless steel or aluminium. Mild steel gives strength at lower cost and is normally galvanised or powder coated. Stainless steel suits coastal and marine sites where corrosion is a risk. Aluminium keeps weight down on larger panels. At Graepels we perforate, weave and expand all three to suit the application.
How Do I Install a Security Mesh Screen?
Measure the opening first and order the mesh pre-cut, as trimming on site weakens the edge. Fix the panel to a rigid steel frame, then bolt or weld that frame to the structure. Set fixings at close centres so the mesh cannot be prised free, and use tamper-proof fasteners on any exposed face.
How Thick Should Security Mesh Be?
Most security mesh sits between 1.5mm and 3mm thick. Around 1.5mm to 2mm suits internal cages, plant guards and light enclosures. Move to 3mm and above for perimeter screens, custodial work and anywhere attack resistance is tested. Thickness works alongside hole size, open area and pitch, so we specify the full pattern together with the gauge.
What Are the Use Cases for Security Mesh?
Security mesh is used wherever a barrier has to resist attack while letting air and light through. Common applications include data centre enclosures, substation and plant screens, window and door grilles, custodial and detention panels, retail shutters, machine guarding, and perimeter fencing infill. At Graepels we also supply it for balustrade infill, ventilation louvres and roof plant screening.
What Is LPS 1175?
LPS 1175 is the Loss Prevention Certification Board standard for intruder resistant building components, enclosures and barriers. Products are attack tested by BRE with set tools and attack times, then given a security rating from SR1 upwards. Specifiers and insurers use the rating to match a product to the risk. Our woven security mesh holds SR1 and SR2 certification as framed stainless steel panels.
What Is the Difference Between SR1 and SR2 Security Mesh?
SR1 mesh is tested to resist an opportunistic attack with basic tools, which suits fencing, enclosures and gates on low to medium risk sites. SR2 mesh is tested against a longer, determined attack with a wider range of tools, which suits higher risk sites such as data centres, utilities and custodial buildings. Both are woven in stainless steel. A site risk assessment will normally state the rating required.