GRP Fibreglass Flat Roofing — Solihull & Birmingham
Certified Cure It Installers. 20-Year Guarantee. Permanent.
Radian Roofing are certified Cure It GRP fibreglass flat roofing specialist serving homeowners across Solihull, Birmingham and the West Midlands. We don't offer GRP as one of many services — it is what we specialise in. Every GRP roof we install is laid by a trained specialist, to manufacturer specification, using the Cure It system — the UK's leading GRP flat roofing product. That is what makes the 20-year guarantee valid. That is what makes the difference between a flat roof that lasts and one that fails.
✓ Certified Cure It GRP Installers
✓ 20-Year Cure It Materials Guarantee
✓ 5-Year Radian Workmanship Warranty
✓ Free No-Obligation Survey
✓ Response Within 2 Hours
What Is GRP Fibreglass Flat Roofing?
GRP stands for Glass Reinforced Plastic — the same material used in boat building for decades. It was introduced to UK roofing in the 1980s and has since become the most durable and reliable flat roofing system available for domestic properties.
A GRP flat roof is built up in layers — fibreglass reinforcement matting saturated with roofing resin, applied directly over an 18mm OSB3 structural deck. The result is a completely seamless, rigid, waterproof membrane that is chemically bonded to the deck beneath. No joins. No seams. No weak points. Nowhere for water to penetrate.
Finished with a hard-wearing topcoat — available in a range of colours including the popular dark grey — a GRP flat roof is UV resistant, withstands foot traffic, requires zero maintenance and will last 25 years or more when installed correctly by a certified specialist.
Looking for a Cure It certified GRP roofer in Solihull or Birmingham?
GRP is the ideal flat roofing system for virtually all domestic flat roof applications:
✓ Single-storey extensions and kitchen extensions
✓ Double-storey extension flat roof sections
✓ Garage roofs — single and double
✓ Dormer flat roofs
✓ Porch roofs
✓ Bay window roofs
✓ Orangery and garden room roofs
✓ Balconies and walkways
✓ Flat roof sections on new build properties
✓ Roof lantern and rooflight surrounds
Where GRP Flat Roofing Is Used
✓ Free no-obligation quotes
✓ Response within 2 hours
✓ Fully insured
✓ 2 year warranty as standard
✓ Serving Solihull & Birmingham since 2001
✓ Free no-obligation quotes ✓ Response within 2 hours ✓ Fully insured ✓ 2 year warranty as standard ✓ Serving Solihull & Birmingham since 2001
GRP vs Felt vs EPDM Rubber Why GRP Wins
GRP is the only flat roofing system that is completely seamless — no joints, no overlaps, no adhesive seams that can lift and fail. That is why it is the only system Radian installs.
The Cure It GRP System — Why We Use It
Not all GRP systems are equal. Radian exclusively installs using the Cure It GRP system — the UK's leading GRP flat roofing product, manufactured under ISO9001 certification for over 30 years.
20-year manufacturer materials guarantee — one of the strongest in the industry
Specially formulated Duraflex roofing resin for enhanced bonding and flexibility
UV resistant — will not deteriorate, crack or blister under heat or sunlight
Fully seamless installation — no joins, no seams, no weak points
Withstands foot traffic without damage
LABC certified — Local Authority Building Control registered detail
CE marked and fully compliant with UK building regulations
Tested to BS and ETAG standards
Available in a range of colours, including dark grey, light grey and black
Year-round installation — suitable for temperatures down to 0°C
As certified Cure It installers, every GRP roof we install is laid to the manufacturer's specification. That certification is what activates the 20-year guarantee. Without it the guarantee is void — which is exactly what happens when a builder or non-specialist installs GRP incorrectly.
Looking for a Cure It certified GRP roofer in Solihull or Birmingham?
Warm Deck vs Cold Deck GRP Flat Roofs
For new extensions and new build flat roofs, Radian always recommends a warm deck specification. Here's why:
Cold deck
Insulation sits below the structural deck. The timber structure is exposed to cold air and condensation. Over time, this leads to moisture in the structure, rot, and a significantly shorter roof lifespan.
Warm deck
Insulation sits above the structural deck. The timber stays warm, dry and protected for the lifetime of the roof. Better thermal performance, lower energy bills and a longer-lasting structure.
Warm deck GRP is the correct specification for any new extension or new build flat roof, and the one Radian always recommends. Some contractors specify a cold deck because it is cheaper to install — we don't.
GRP Flat Roof Rescue — When It's Gone Wrong
One of the most common jobs Radian carries out is rescuing a GRP flat roof installed incorrectly by a builder or non-specialist. The signs are always the same:
✓ Cracking and crazing across the GRP surface
✓ Delamination — the laminate lifting away from the deck
✓ Leaks appearing within months of installation
✓ No expansion joints installed
✓ Wrong resin used or resin applied too thick
✓ OSB decking saturated with moisture beneath
A failed GRP roof cannot be patched permanently. Once the laminate has delaminated or the OSB is wet, the only correct solution is a full strip and replacement by a certified specialist. Radian carries out GRP rescue jobs across Solihull, Birmingham and the West Midlands — stripping back to the structure, replacing any damaged decking and timber, and installing the Cure It system correctly from scratch.
If your GRP flat roof is leaking, cracking or was installed by a builder rather than a specialist, call Radian before the damage gets worse.
GRP Flat Roofing Prices in Solihull & Birmingham
We publish our prices because we believe you deserve to know what things cost before you pick up the phone.
Typical project costs:
All prices include materials and labour. Scaffolding is arranged by Radian Roofing and quoted separately as a line item on all written quotes. VAT not applicable. Prices may vary depending on material costs at the time of installation."
GRP Roofing Projects Across Solihull & Birmingham
Every project is completed to the same uncompromising standard. No shortcuts. No callbacks.
Areas We Cover for GRP Flat Roofing
Radian Roofing install GRP fibreglass flat roofs across Solihull, Knowle, Dorridge, Bentley Heath, Balsall Common, Lapworth, Cheswick Green, Hockley Heath, Edgbaston, Harborne, Four Oaks, Sutton Coldfield, Little Aston, Streetly, Moseley, Barnt Green, Kings Heath, Hall Green, Shirley, Dickens Heath, Coventry and the wider Birmingham and West Midlands area.
Frequently Asked Questions — GRP Flat Roofing
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A correctly installed GRP flat roof using the Cure It system will last 25 years or more with zero maintenance. The Cure It materials carry a 20-year manufacturer guarantee. Radian adds a 5-year workmanship warranty on top.
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Most domestic GRP flat roof installations are completed within 1 to 2 days depending on size and complexity. A standard garage roof typically takes one day. A large extension roof or dormer rescue may take two days.
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Yes. The Cure It system is formulated for year-round installation and can be applied in temperatures down to 0°C. We never use cold weather as an excuse to rush or cut corners.
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Yes. A new GRP flat roof on an extension or garage adds value by extending the lifespan of the structure and removing a potential survey red flag for buyers. A failed flat roof does the opposite.
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Cracking on a GRP flat roof is almost always caused by incorrect installation — wrong resin, no expansion joints, resin applied too thick or too fast, or the surface not properly prepared. A cracked GRP roof cannot be permanently patched. Call Radian for an honest assessment.
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The Cure It topcoat is available in a range of colours. The most popular choices for residential properties are dark grey, light grey, slate grey and black. We can advise on the best colour to complement your property.
Ready for a Permanent GRP Flat Roof?
Get in touch with Radian Roofing today for your free no-obligation GRP survey and written quote. We cover Solihull, Knowle, Dorridge, Bentley Heath, Edgbaston, Harborne, Sutton Coldfield, Birmingham, Coventry and the wider West Midlands.
✓ Free Survey
✓ Certified Cure It Installers
✓ 20-Year Guarantee
✓ Response Within 2 Hours
✓ No Hard Sell