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Roof Repair Products
Roof repair products are often the quickest route for active leaks, failing felt and problem roof areas.
- Leak repair coatings
- Suitable repair options for felt, GRP and metal roofs
- Useful for urgent weather-related repairs
Flat Roofing Supplies • GRP Roof Kit specialists• Roof Repair Systems
UK Fibreglass GRP Roofing Kits
Shop GRP Fibreglass roof kits, liquid roof repair systems, flat roof protection, trims, resins and roofing accessories from one clear supplier route.
300g, 450g, 600g and fire-rated GRP kits • Leak repair coatings • Trims, tools and flat roof protection
Shop by flat roof job
New Flat Roof
GRP Roofing Kits
Complete fibreglass kits for garages, extensions and outbuildings.
Fix a Leak
Liquid Roof Repair
Fast repair coatings for felt, GRP, metal and common flat roof leaks.
Overlay a Roof
Liquid Roofing Kits
Overlay and liquid waterproofing systems for suitable existing roofs.
Finish the Job
Trims, Resins & Accessories
GRP trims, resin, topcoat, matting, tools, outlets and primers.
Protect a Roof
Flat Roof Protection
Rubber mats, walkway tiles and protection for access areas.
Not Sure?
Use CRS Roof Mate
Calculate your roof kit and choose the right route before ordering.
CRS ROOF MATE
What’s your roof problem?
Choose the closest option. Roof Mate will guide you to the right product or calculator.
Choose Your GRP System
Our GRP Roofing Kits
Pick the right fibreglass roofing kit for your roof size, project type and performance requirement.
10
Year
Material Quality Warranty
Small Roofs
300g GRP Roofing Kits
Lightweight GRP system for smaller flat roofs
- Ideal for sheds, porches and small roofs
- Lightweight 300g/m² GRP laminate
- Fast curing, easy to apply system
10
Year
Material Quality Warranty
Garages & Extensions
450g GRP Roofing Kits
The best all-round GRP roofing kit
- Perfect for garages and extensions
- 450g/m² standard GRP laminate
- Strong choice for most domestic flat roofs
15
Year
Material Quality Warranty
Heavy Duty Large Roofs
600g GRP Roofing Kits
Premium heavy duty system for demanding projects
- For larger roofs and demanding projects
- 600g/m² premium GRP laminate
- Backed by a 15-year material warranty
FR
Rated
Fire Rated System
Fire Rated
Fire Rated GRP Roofing Kits
Certified options where fire performance matters
- Fire-rated GRP system options
- For certified performance requirements
- Professional system build-up
CRS Warranty Backed
Clear Warranty Support
CRS GRP kits are supported by clear material quality warranty documentation, helping customers buy with confidence and giving installers a stronger system story.
- 10-year standard GRP warranty
- 15-year 600g system warranty
- Professional warranty certificate
- Supports correct installation records
Not sure which GRP kit you need?
Use CRS Roof Mate to calculate your roof size and choose the right materials before ordering.
Launch Calculator →
Choose by roof job
Not every flat roof needs the same system
Start with the job you are doing, then choose the right CRS route for kits, repairs, overlays or detailed liquid roofing.
New flat roof
GRP Roofing Kits
Best for garages, extensions, sheds, dormers and new flat roof installations where you want a complete fibreglass system.
Shop GRP kits → Active leakTEKCRYL Roof Repair
For fast liquid repair on leaking felt, GRP, metal and problem roof areas without jumping straight to a full replacement.
Fix a leak → Overlay existing roofEverGreen Hybrid Overlay
For structurally sound roofs where you want a reinforced overlay system instead of stripping everything back.
View overlay system → Detailed areasTEKPUR SP Liquid Roof System
For awkward details, rooflights, upstands, pipe penetrations, balconies and complex waterproofing areas.
View TEKPUR SP →
Still not sure?
Use CRS Roof Mate to build the right kit before ordering.
Open CRS Roof Mate
Flat Roofing Help & Supplies
Flat Roofing Supplies & Support
Composite Roof Supplies helps homeowners, trades and DIY installers choose the right flat roof products for the job. From new installations and roof repairs to overlays, trims and tools, we focus on practical systems, clear guidance and UK delivery.
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New Flat Roof Installations
For new deck build-ups or replacement roofs, GRP provides a seamless, fully bonded waterproof system.
- Garage, extension and outbuilding roofs
- 300g, 450g and 600g kit ranges
- DIY and trade-friendly options
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Roof Restoration & Overlays
For suitable existing roofs, an overlay system can extend roof life without a full strip-off.
- Hybrid overlay options
- Useful for sound existing substrates
- Practical route for refurbishment projects
Buy the system, trims and tools in one place
Roofing jobs go wrong when customers buy half a system from one place, trims from another, and then realise something critical is missing. Composite Roof Supplies is built around practical product routes, so customers can move from system choice to kit, trims, tools and repair products with less guesswork.
Clear system routes
Choose between new roof kits, repair systems, overlays and detailing products.
UK delivery
Flat roofing products supplied across the UK for trade and domestic projects.
DIY & trade support
Product guidance for installers who need the right materials without the waffle.
Complete product range
Kits, repair coatings, trims, tools, accessories and system extras.
Helpful Tools & Buying Routes
Use the main buying routes below to calculate materials, compare options or go straight to the products most customers need first.