07447 188036info@gnbroofing.co.uk Serving East AngliaMon–Sat 7am–6pm HomeAboutServicesFlat Roof InstallationFlat Roof ReplacementFlat Roof RepairsEPDM Rubber RoofingSingle-Ply Membrane (SFlex · Sika Plan · Resitrix)Commercial Flat RoofingFascias & Soffits (UPVC)Guttering & BargeboardsCladding — UPVC, Timber-Effect & Composite AreasNorfolk NorwichThorpe St Andrew & SprowstonHellesdonCostesseyTaverhamDraytonCringlefordWymondhamDerehamGreat YarmouthThetfordKing's Lynn County overview Norfolk (county overview)Suffolk (county overview)Cambridgeshire (county overview) Our WorkReviewsContact07447 188036Get Free Quote - Home - Services - Flat Roof Repairs Flat Roof Repairs # Flat Roof Repairs& Leak Responsein East Anglia Track down the actual leak, fix it properly, and tell you honestly whether repair or replacement is the right call — with no call-out fee and a fixed written quote in 3–4 days. Get my free fixed-price quote 07447 188036 Free survey · No call-out fees · Written quote in 3–4 days · You deal with Neil directly Flat-roofing specialist Sika Plan Approved Installer 20-yr product / 10-yr workmanship PL & EL fully insured Free fixed-price quotes Service overview ## What we do, who it's for, and when to book it. ### What it is Targeted repair of live leaks, storm damage, failed upstands, split laps, cracked flashings and pond-damaged sections on EPDM, single-ply, felt and asphalt roofs. ### Who it's for Homeowners with a fresh water stain on the ceiling, landlords with a tenant reporting a drip, and commercial owners whose roof was fine until the last storm. ### When it's needed As soon as you see a stain, hear a drip, or spot a lifted upstand after high wind. Small early repairs cost a fraction of a rotten deck. ### Why it matters A flat roof leak is rarely where the ceiling stain is — water tracks along the deck and joists before it drops. A proper diagnosis is worth more than a fast tube of mastic. The cost of leaving it ## What actually happens when this is put off. ### If it's ignored - One winter of a hidden leak can rot the deck and joists — turning a £200 repair into a £4,000 replacement. - Water in insulation loses almost all its thermal value, so heating bills climb before the ceiling even stains. - Damp migrating into ceilings and walls becomes a mould problem long before it's visibly obvious. ### Common mistakes we clean up after - DIY tubes of black mastic that hide the leak for a season and make the eventual repair far messier. - 'Just paint on a coating' from a passing trader — coatings don't fix upstand failures or split laps. - Assuming the ceiling stain marks the leak. It almost never does. Our process ## A predictable path from first call to guaranteed sign-off. - 01 Free call-out & inspection No fee to come and look. We diagnose the actual failure — not just the symptom. - 02 Honest recommendation You get a straight answer: repair, or replace. If replacement is cheaper across 5 years, we'll say so. - 03 Fixed written quote A written price for the repair, so there are no surprises. - 04 Repair to manufacturer spec Correct primers, welds and detailing — not mastic and hope. - 05 Water-test & sign-off Where practical we water-test the repair before we leave, then issue a workmanship guarantee on the repair. What you actually get ## The outcomes — not the sales talk. No call-out fees, ever You pay for the repair, not the visit. Same-week response Emergency leaks and storm damage prioritised. Honest 'repair vs replace' answer If it's not worth repairing, we'll tell you before we take your money. Workmanship guarantee on repairs Written guarantee on the repair area — not just a handshake. PL & EL insured Full public and employer liability cover for every visit. You deal with Neil directly Owner-run: the person quoting is the person fixing it. Specification detail ## The technical honest version. Most flat roof leaks come from a small number of predictable failure points. Knowing where to look is half the job. ### Upstand and termination failures Where the flat roof meets a wall or parapet is the number-one failure point — flashings lift, sealants perish, cover flashings pull out. ### Split laps and welded seams On felt and older single-ply, seams open with thermal movement. On EPDM, adhesive laps can lift if originally under-primed. ### Pond damage Standing water accelerates membrane breakdown. Sometimes correctable with a taper insulation patch; sometimes it means the falls were wrong from day one. ### Outlet and pipe penetrations Rainwater outlets, soil vents and boiler flues need proper collars — a common site of chronic slow leaks. ### Storm damage High winds lift edge trims and drip flashings; hail can pit older coverings. Both are usually insurable — we can quote in a format your insurer will accept. ### When repair stops being sensible Multiple failures, saturated insulation, or soft deck — replacement is honestly cheaper. We won't sell you a repair we don't believe in. Frequently asked ## Questions we answer at almost every survey. Do you offer emergency call-outs?+Yes — we prioritise active leaks and storm damage. Call and we'll book the soonest slot we can, often same-week. How much does a typical repair cost?+Small localised repairs start low; the honest answer depends on what's actually failing. Survey is free and the written quote is fixed. Do you charge a call-out fee if I don't book the repair?+No. No call-out fees, ever — whether or not you proceed. Is the repair guaranteed?+Yes. We issue a written workmanship guarantee on the repair area. Can you repair a felt or GRP roof?+We'll assess and repair felt where a repair genuinely solves the problem. We don't install felt or GRP new, but we won't leave you stuck. Will the repair last?+A properly executed repair on a fundamentally sound roof will last for years. If the underlying roof is at end of life, we'll tell you at the survey and quote replacement instead. Do you cover the whole of Norfolk, Suffolk & Cambridgeshire?+Yes. We're based in Norwich (NR5) and work across Norfolk, Suffolk and Cambridgeshire — including all the Norwich suburbs (Thorpe St Andrew, Sprowston, Hellesdon, Costessey, Taverham, Drayton, Cringleford), Wymondham, Dereham, Thetford, Great Yarmouth and King's Lynn. If you're on the edge of that area, phone and ask — we don't charge to travel to quote. Do you charge call-out fees?+No. Surveys and quotes are free, and there are no call-out fees. You get a fixed written price before any work starts — no day-rates, no hidden extras. Who will I actually deal with?+Neil, the owner, personally quotes and runs every job. You won't be handed to a call centre or a subcontracted crew. One point of contact from first call to final sign-off. Where we cover ## Flat Roof Repairs across Norfolk, Suffolk & Cambridgeshire. NorwichThorpe St Andrew & SprowstonHellesdonCostesseyTaverhamDraytonCringlefordWymondhamDerehamGreat YarmouthThetfordKing's LynnNorfolk (county overview)Suffolk (county overview)Cambridgeshire (county overview) Related services ## Also worth looking at. Flat Roof Replacement Strip the failed covering, put the deck and falls right, upgrade the insulation, and re-cover in a manufacturer-warranted system — for a fixed price with a 20-year product guarantee and a 10-year workmanship guarantee. View service EPDM Rubber Roofing A one-piece EPDM rubber roof — seamless, low-maintenance, 25+ year design life — installed for a fixed written price by an owner-run, insured, Sika Plan Approved installer. View service Commercial Flat Roofing Warrantied, long-life commercial flat roofing — installed by a Sika Plan Approved contractor, scheduled around your operations, priced fixed with no day-rate creep. View service One next step ## Get a fixed written quote for your flat roof repairs — in 3–4 days. Free survey. No call-out fees. Sika Plan Approved. 20-year product / 10-year workmanship guarantee. Neil quotes it and Neil installs it. Book my free survey Call 07447 188036 Mon–Sat 7am–6pm Flat-roofing specialists serving homes and businesses across East Anglia. Sika Plan Approved. Fully insured. Owner-run by Neil Cockman. Sika Plan Approved Installer ### Services - Flat Roof Installation - Flat Roof Replacement - Flat Roof Repairs - EPDM Rubber Roofing - Single-Ply Membrane - Commercial Flat Roofing - Fascias & Soffits ### Service Areas - Norwich - Thorpe St Andrew & Sprowston - Hellesdon - Costessey - Taverham - Drayton - Cringleford - Wymondham - Dereham - Great Yarmouth - Thetford - King's Lynn - Norfolk (county overview) - Suffolk (county overview) - Cambridgeshire (county overview) ### Contact - 07447 188036 - info@gnbroofing.co.uk - 6 Gilbard RoadNorwich, NR5 8TR - Mon–Sat 7am–6pm · Closed Sun © 2026 GNB Roofing Services. All rights reserved.Privacy PolicyCookie PolicyTerms & Conditions Call NowGet Free Quote We use essential cookies to make this site work, and optional ones only if you accept. Cookie policy. AcceptReject