If you're replacing a flat roof in Thanet or East Kent, you'll be choosing between three main systems: GRP fibreglass, EPDM rubber and felt. Here's how they compare — honestly.
GRP Fibreglass
A seamless, glass-reinforced polyester layer laid on marine ply. Extremely durable, looks smart, and comes with 20–25 year guarantees. Best choice for extensions and dormers where finish matters. Slightly more expensive but the longest-lasting option.
EPDM Rubber
A single-piece rubber membrane, glued down. Excellent for larger flat roofs — no seams means no leak points. Lasts 30+ years and handles UV and temperature swings well. Great value for garages and outbuildings.
Felt (Torch-on)
The traditional 3-layer torch-on felt system. Still reliable when installed properly, typically lasting 15–20 years. Cheapest upfront but has more seams than GRP or EPDM.
Which should you choose?
For a house extension where the roof might one day be visible or walked on: GRP.
For a large garage or workshop: EPDM.
For a tight budget on a garden shed or small outbuilding: felt.
We fit all three across Thanet and East Kent — happy to give honest advice on which suits your project.