Felt has been the default flat-roof system for decades — cheap, quick, familiar. GRP fibreglass is the modern alternative — more expensive upfront, but with a much longer life. Most homeowners are choosing between the two when an old felt roof finally gives up.
Is GRP twice the price of felt?
Roughly 50% more supplied and fitted. But GRP typically lasts twice as long, so the lifetime cost is similar or lower.
Can GRP go straight over an old felt roof?
No — the old covering must be stripped and the deck checked. Overlaying is a false economy and rarely lasts.
Which is better for a garage?
If budget is tight and the garage is dry inside, felt is acceptable. For any roof above living space, GRP or EPDM is the better choice.
Evans Roofing & Maintenance Ltd, Witney, Oxfordshire. Call 07960 482233 for a free written quote.