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 - EPDM Rubber Roofing EPDM Rubber Roofing # EPDM Rubber RoofingInstalled AcrossEast Anglia 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. 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 Installation of one-piece EPDM rubber membranes (Firestone / Classic Bond family and Resitrix for complex detailing) on garages, extensions, dormers, porches and outbuildings. ### Who it's for Homeowners who want a proven, seamless, low-hassle flat roof — and don't want to keep patching felt every few years. ### When it's needed On new extensions and garages, replacing an ageing felt or GRP roof, or covering any small-to-medium flat area where a seamless single-sheet finish is preferred. ### Why it matters EPDM is a mature, well-understood product. On a small-to-medium roof, a one-piece install eliminates almost all seam-failure risk — the historic weak point of every other flat roof product. The cost of leaving it ## What actually happens when this is put off. ### If it's ignored - Old felt cracks and blisters in UV — leaks then track under laps and rot the deck long before the ceiling stains. - GRP (fibreglass) roofs crack at every movement joint and are notoriously hard to repair invisibly. - Every year of delay adds deck damage that turns a £X re-cover into a full re-deck. ### Common mistakes we clean up after - Buying a cheap EPDM kit from a builders' merchant and letting a general trade fit it — adhesive coverage and lap detailing decide whether it lasts 25 years or 5. - Skipping the perimeter trims and skirting the upstand detail — where 90% of EPDM failures start. - Fitting EPDM over a wet or rotten deck — the membrane is fine, but the sub-strate isn't. Our process ## A predictable path from first call to guaranteed sign-off. - 01 Free survey We measure, check the deck, and confirm EPDM is the right call for your roof. - 02 Fixed written quote in 3–4 days A named product, a full spec, a fixed price. - 03 Deck prep Old covering off, deck inspected, rotten boards replaced, surface prepped for adhesive. - 04 One-piece membrane bond Sheet relaxed, contact-bonded, rolled and dressed into all upstands in one continuous piece. - 05 Trims, upstands & sign-off Kerb trims, drip edges and upstand terminations finished, site cleaned, guarantee issued. What you actually get ## The outcomes — not the sales talk. Seamless one-piece install No welded seams on the field of the roof — the classic failure point removed. 25+ year design life Proven long life with minimal upkeep. 20-year manufacturer product guarantee Plus 10-year workmanship guarantee from GNB Roofing. Fast install Most single-garage EPDM roofs go on in 1–2 working days. Fixed price, no call-out fees Free survey, fixed quote, no surprises. Neil quotes it and fits it One trusted point of contact from survey to sign-off. Specification detail ## The technical honest version. EPDM isn't a single product — it's a family. What we install depends on roof size, detailing complexity and the state of the existing substrate. ### Classic Bond / Firestone-style EPDM One-piece cured rubber membranes contact-bonded to the deck. Ideal for garages, extensions and porches up to typical single-piece sheet sizes. ### Resitrix self-adhesive EPDM Bitumen-backed self-adhesive EPDM — ideal for refurbishments over existing bitumen, complex detailing, and roofs with many penetrations or rooflights. ### Warm-roof build-up under EPDM PIR insulation over deck, vapour control layer, then membrane — meets current U-value regs and eliminates cold-deck condensation risk. ### Detailing: trims, drips and upstands Where most cheap EPDM installs fail. We use manufacturer-approved trims, primers and reinforced corner detailing throughout. ### EPDM vs single-ply Single-ply (Sika Plan / SFlex) is usually the right call on larger and commercial roofs; EPDM is usually the right call on smaller domestic. At survey we'll say honestly which suits yours. ### Repairability EPDM can be neatly patched with the same product decades later — repair is straightforward, unlike GRP. Frequently asked ## Questions we answer at almost every survey. How long will an EPDM roof last?+Design life is typically 25+ years and often significantly more when installed on a sound deck with correct detailing. Product guarantee is 20 years. Is EPDM better than felt?+For long-term life and maintenance cost, yes — by a distance. Felt is cheaper day one but rarely economical across a 10-year window. Can EPDM be walked on?+Occasional foot traffic (maintenance access to a chimney, aerial or boiler flue) is fine. Regular traffic needs walkway boards or paving on protection mats. Will it look flat with no visible joins?+Yes — on a typical domestic roof it's a single piece with no field seams, only clean perimeter trims. How much does an EPDM garage roof cost?+Priced individually — deck condition and detailing vary. Survey is free, quote is fixed in writing within 3–4 days. Do you handle old felt disposal?+Yes — strip-out, skip and tip fees are all included in the fixed price. 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 ## EPDM Rubber Roofing 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 Installation A properly specified, single-ply or EPDM flat roof — installed by a Sika Plan Approved Installer, guaranteed 20 years on materials and 10 years on workmanship, for a fixed written price with zero call-out fees. View service Single-Ply Membrane (SFlex · Sika Plan · Resitrix) Premium single-ply membrane systems — SFlex, Sika Plan and Resitrix — installed by a Sika Plan Approved contractor with the extended manufacturer warranty that comes with it. View service Flat Roof Repairs 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. View service One next step ## Get a fixed written quote for your epdm rubber roofing — 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