Flat Roof Repair Kings Worthy

Patch repair on a Kings Worthy extension flat roof: £300–£600. Torch-on felt section replacement: £400–£800. Full GRP replacement on a standard extension (20m²): £1,800–£2,800. Free survey — we confirm repair vs replace at survey and include both options in the written quote.

If failures are at one or two isolated locations and the surrounding membrane is sound, repair is appropriate. If the roof has failed at multiple points, has soft deck boards, or is over 30 years old with no previous replacement, full GRP replacement is likely better value. We confirm at the free Kings Worthy survey.

Kings Worthy's 1970s–80s chalk ridge estates properties typically have felt flat roofs on rear extensions added in the 1960s–80s. These membranes are now 40–65 years old — many are at or past end of design life.

GRP repairs require temperatures above 5°C and dry conditions — most Winchester winter days meet this threshold. Felt torch-on repairs can proceed in cold conditions. We monitor the forecast for Kings Worthy and carry out flat roof repairs on appropriate winter days.

Patch repair: 2–4 hours. Torch-on section replacement: half a day. Full GRP replacement on a standard Kings Worthy extension: 1–2 days. Full timelines are confirmed in the written quote.

Yes — deck condition is part of every flat roof survey. Soft deck boards require replacement before membrane repair — applying new membrane over rotten deck creates re-failure within 2–5 years. Deck replacement cost is confirmed before work starts, not discovered and charged afterwards.

GRP patch repairs: 10-year workmanship guarantee. Full GRP replacement: 25-year manufacturer warranty plus 10-year workmanship guarantee. Torch-on felt repairs: 10-year workmanship guarantee. Written guarantee issued on completion of all Kings Worthy flat roof work.

An active leak through a flat roof causing ceiling damage is an emergency. We provide same-day emergency flat roof response across Kings Worthy — call 01962 809171. We make the roof watertight in the same visit and book the permanent repair if specialist materials are required.

No — GRP requires stripping the existing membrane to a clean, dry deck. GRP applied over felt does not bond correctly and the manufacturer warranty is void. Full strip is always required for a warranted GRP installation.

We check and clear outlet drainage on every flat roof survey and repair visit. Blocked outlets are a primary cause of membrane failure — water that cannot drain ponds on the surface and accelerates deterioration. Outlet clearing is included in the survey, not a separate charge.