Flat Roofing Eastbourne

A standard garage flat roof replacement in Eastbourne costs £800–£1,800 for felt and £1,500–£3,000 for GRP fibreglass. Larger extension roofs run £2,500–£6,000 for GRP. EPDM rubber is comparable in price to GRP. We recommend GRP for most Eastbourne applications because of its resistance to salt-air UV degradation.

For Eastbourne's coastal conditions, GRP fibreglass is our primary recommendation. It is fully waterproof, unaffected by salt air, UV-stable and seamless — no joints for water to infiltrate. EPDM rubber is a close second. Traditional felt has the shortest lifespan in coastal conditions and we generally advise against it for new installations.

A properly installed GRP flat roof carries a 25-year product warranty and will outlast most felt alternatives by two to three times. In Eastbourne conditions — UV exposure, salt air and temperature cycling — GRP consistently outperforms felt systems.

Bubbling and surface crazing are early signs of felt delamination or moisture ingress. If the deck below is still sound, a GRP overlay or overlay membrane is sometimes viable. If the deck has rotted through — common on Eastbourne properties from the 1960s–80s — full replacement is the right answer. We'll assess and advise honestly.

GRP fibreglass is seamless, UV-stable and unaffected by salt air — all critical properties for coastal East Sussex. Felt flat roofing degrades faster under UV exposure from sea-reflected light, becomes brittle in coastal temperature cycles, and is prone to salt saturation of the membrane over time. A properly installed GRP roof in Eastbourne will outlast felt by 15–20 years minimum.

GRP installation requires a minimum temperature of around 5°C and dry conditions for the laminate to cure correctly. In practice this means we can install GRP flat roofs throughout the year in Eastbourne except in the coldest winter spells. We monitor the weather forecast before scheduling flat roof work and will not proceed in conditions that would compromise the cure. EPDM rubber can be installed in colder conditions if needed.

A like-for-like flat roof replacement does not require planning permission. Converting a pitched roof to flat, or adding a new flat-roofed structure, may require consent depending on size and location. Properties in conservation areas should check with Eastbourne Borough Council before altering any roof visible from a public road. We confirm planning requirements for your specific property before any work begins.