Grp vs Single Ply Rotherham
When it comes to flat roofing, many people assume that GRP (fiberglass) or felt is the cheapest option. But what often gets overlooked are the hidden costs:…
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The Hidden Problems with GRP and Felt Roofs – and Why Single Ply WiNS
Introduction
When it comes to flat roofing, many people assume that GRP (fiberglass) or felt is the cheapest option. But what often gets overlooked are the hidden costs: repairs, leaks, premature replacements, and ongoing maintenance. Over the years, we’ve replaced countless GRP and felt roofs with single ply — and the difference speaks for itself.
The Problems with GRP Roofs
1. Rigid and Brittle
GRP (glass reinforced plastic) may look solid, but it’s rigid. When your building naturally moves with temperature changes, GRP can’t flex — leading to cracks.
2. Short Lifespan
Despite bold claims, many GRP roofs fail within 10–15 years, especially when exposed to direct sunlight.
3. Slippery and Unsafe
GRP surfaces can become dangerously slippery when wet, making maintenance a hazard.
The Problems with Felt Roofs
1. Vulnerable to Weather
Traditional felt struggles with extreme weather. It cracks in cold winters and blisters in hot summers.
2. Frequent Repairs
Felt roofs often need patching, which is unsightly and temporary.
3. Low Durability
On average, felt roofs last just 5–10 years before needing full replacement.
Why Single Ply Roofing is Better
Flexibility
PVC membranes expand and contract without cracking.
Long-Term Value
Though slightly higher in upfront cost, single ply saves money by lasting decades longer than GRP or felt.
Seamless & Watertight
Hot-air welded seams create a bond stronger than the membrane itself — no weak spots.
Trusted at Scale
If it works for Wembley and Emirates Stadium, it works for your home.
Case Example – Doncaster Home Extension
A homeowner in Doncaster had a leaking GRP roof on their extension. After multiple costly repairs, they switched to a single ply system. Now, they enjoy peace of mind with a 20-year warranty and zero maintenance headaches.
Conclusion
While GRP and felt may seem like quick fixes, they’re ultimately false economies. Single ply roofing, on the other hand, is a long-term investment that delivers value, durability, and peace of mind.
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