GRP & EPDM Roofing Kits: Price Comparison by m2

Budget Bracket: Smaller Projects and DIY 

Kits here use 450g matting with a standard two-coat application. You get matting, resin, topcoat, and basic trims, enough for a complete small flat roof install.

Best suited to sheds, porch roofs, and small flat roof sections where foot traffic afterwards will be light. It won't hold up well under heavy use or across large areas, so if your roof gets regular traffic, step up a bracket now rather than repairing in a few years.

Browse 450g GRP Roofing Kits

Mid-Range Bracket: Garages, Sheds, and Bigger Roofs 

600g heavy-duty matting and fire-rated options like Silverseel and ResTec sit here, built to BRoof(t4) or equivalent. These handle more demanding jobs without needing professional-grade tools.

Suits garage roofs, larger sheds, and any domestic job where fire performance regulations might apply. Most confident DIYers and tradespeople land in this bracket. The trade-off is a multi-coat system, so it takes longer to apply and the finish depends more on technique.

Browse Fire Retardant GRP Kits

Premium Bracket: Longest Guarantees, Fastest Application 

Single-coat overlay systems and complete kits sit at the top, Cure It ONE being a good example with its 20-year guarantee and fast single-coat finish. You're paying for a system applied once and left alone, with a cleaner result than a standard two-coat kit typically achieves.

Makes sense for larger roofs or jobs where application time matters. The catch is cost, plus less margin for error outside the system's specified conditions.

Browse Complete Overlay Systems

Which Bracket Is Right for Your Roof 

Coverage area and expected foot traffic matter more than which bracket looks cheapest. A shed doesn't need a 20-year premium system, and a garage with daily use shouldn't get the lightest kit on the site just because it's the cheapest line item.

Frequently Asked Questions

Do I need 450g or 600g GRP matting? 

The number is the weight of the chopped strand matting per square metre. 450g works fine for sheds and porches where nobody's walking around much. Go 600g for garages or balconies, anywhere that gets regular foot traffic. More glass fibre packed into the mat means it holds up better under impact.

How much does a 10m2 roofing kit cost?

Depends on the bracket. Budget kits are cheapest, premium single-coat systems cost the most, and the comparison table above has the current numbers for everything in between. 

Is GRP or EPDM better for a flat roof?

GRP forms one continuous surface with no joins, which makes it the stronger choice for balconies or any roof broken up by skylights and pipework. EPDM makes more sense on a plain rectangular roof with nothing complicated going on, since it comes in large single sheets and handles building movement without cracking.

Do I need a fire-rated kit?

If your roof's close to a boundary or falls under specific Building Regulations requirements, yes. Look for kits tested to BRoof(t4) specifically, like Silverseel, rather than ones just marketed as fire-resistant. Check your project's actual requirements before assuming a standard kit will cover you.

Not sure which kit fits your roof?

Tell our team the size, the roof type, and how much foot traffic it gets, and we'll point you to the right one. No point paying for a 20-year guarantee on a shed, or putting a 450g kit on something that's going to get walked on every day.

Browse the full range or contact us for advice