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 - Areas - Dereham Norfolk · 35 minutes from our NR5 yard · Local rates, no travel loading # Flat RoofingSpecialists inDereham Sika Plan Approved flat roof installers across Dereham and the surrounding NR19, NR20 postcodes. Free surveys, fixed written quote in 3–4 days, 20-year product / 10-year workmanship guarantee. Get my free fixed-price quote 07447 188036 Same-week survey — typically 2–3 working days across NR19, NR20 · No call-out fees · 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 Local coverage ## How we serve Dereham — properly. Dereham (East Dereham) is central Norfolk's main market town and we're there regularly. The mix of town-centre stock, post-war housing around the outskirts and rural properties in the surrounding villages means every survey earns its keep — no rate-card quoting. ### Where we cover in Norfolk NR19 (central Dereham, Toftwood, Etling Green) and NR20 (Swanton Morley, North Elmham, Beetley and the surrounding villages). ### Response times Same-week survey — typically 2–3 working days across NR19, NR20. Emergency leaks and storm damage are prioritised within our operating hours (Mon–Sat 7am–6pm). ### Dereham property types we know Georgian and Victorian town-centre stock around the Market Place with parapet flat rears, post-war housing around Toftwood and the outskirts with garage and porch flats, rural farmhouses and converted outbuildings in the surrounding villages, and modern estate development on the edges. ### Common jobs in Dereham Parapet flat replacements on town-centre stock, garage and porch canopy renewals, rural outbuilding single-ply work, and full UPVC roofline where original timber has finally rotted. Services in Dereham ## Every service we offer is available in Dereham. ### Flat Roof Installation New-build and extension flat roofs in Dereham, installed as warm-roof build-ups to current Part L. Sika-backed guarantee. View service ### Flat Roof Replacement Strip, deck-check and full replacement for end-of-life flat roofs across Dereham. EPDM, Sika Plan or Resitrix. View service ### Flat Roof Repairs Leaks, splits, blisters and storm damage fixed on Dereham properties — with a temporary weatherproof cover if needed today. View service ### EPDM Rubber Roofing Single-sheet EPDM rubber for garages, extensions and small commercial units in Dereham. Long life, no seams over most spans. View service ### Single-Ply Membrane (SFlex · Sika Plan · Resitrix) Sika Plan, SFlex and Resitrix single-ply for larger domestic and commercial roofs in Dereham. Mechanically fixed to wind-uplift spec. View service ### Commercial Flat Roofing Retail, office, light-industrial and agricultural flat roofs across Dereham. Fully insured, Sika Plan Approved workmanship. View service ### Fascias & Soffits (UPVC) UPVC fascias and soffits fitted in Dereham — sealed, ventilated properly, and finished to match your roofline. View service ### Guttering & Bargeboards Full guttering and bargeboard runs in Dereham. UPVC systems rated for the exposure your property actually sees. View service ### Cladding — UPVC, Timber-Effect & Composite UPVC, timber-effect and composite cladding across Dereham — low-maintenance, weather-tight, and finished properly at corners and abutments. View service Why Dereham customers use us ## The concrete reasons — not a mission statement. ### Dereham is on our doorstep Our yard is in Norwich NR5. Dereham is a short drive and part of our normal working week — surveys are quick, snag returns are quick, and there is no padded travel cost on the quote. ### Flat-roofing specialist, not a general trader Flat roofing and roofline is our specialism. If the answer is a repair rather than a replacement, that's what you'll be quoted for. ### Sika Plan Approved workmanship 20-year product / 10-year workmanship guarantee, registered in your name with Sika. The paperwork travels with the property if you sell. ### One quote, one price, one installer Neil surveys, quotes and installs. Fixed written quote in 3–4 days, no day-rates, no hidden extras and no subcontractor mark-up. Local conditions ## What actually goes wrong on Dereham roofs. ### Town-centre parapet failure The Georgian and Victorian stock around the Market Place has flat roofs behind parapets where the failure is nearly always in the old flashings or outlets. We renew flashings and upgrade outlets before re-covering the field. ### Central-Norfolk exposure Sitting in open central Norfolk, Dereham roofs get plenty of wind. Mechanical fixing to the correct wind-uplift zone is standard on every single-ply job we do here. ### Rural mixed-substrate flats Farmhouse and outbuilding flats are often patchwork additions over decades. We strip back to sound substrate, re-form falls and tie in cleanly to pitched abutments. ### Roofline timbers gone soft Original softwood fascia and soffit hidden behind first-generation UPVC has often failed. We renew the timber where needed rather than skinning over rot. Our process ## A predictable path from first call to guaranteed sign-off. - 01 Free on-site survey We visit your Dereham property, get on the roof (or safely inspect it), and check the deck, falls, upstands and outlets — not just the surface. - 02 Fixed written quote in 3–4 days You get a written, itemised, fixed-price quote. No day-rates, no hidden extras, no pressure — decide in your own time. - 03 Book a slot that suits you Once you approve the quote, we agree a start date that works around you. Materials are ordered direct from Sika. - 04 Installation by Neil Neil installs the job personally with a small dedicated team. Site is kept tidy, protected and safe throughout. - 05 Sign-off & registered guarantee On completion we walk the finished roof with you, register the Sika-backed guarantee in your name and issue paperwork you can pass on if you sell. Frequently asked in Dereham ## Questions we answer at almost every Dereham survey. How fast can you reach Dereham for a leak?+Active leaks in NR19, NR20 usually get a first visit within 2–3 working days in operating hours (Mon–Sat 7am–6pm). Temporary weatherproof cover is fitted on the same visit if the leak is active, and the permanent repair is quoted in writing within 3–4 days. How much does a flat roof cost in Dereham?+We don't quote by rate card because no two Dereham properties are identical — a Victorian rear extension and a 1970s garage conversion need different membranes, insulation upgrades and detailing. Every price is a fixed written quote after a free on-site survey, so you know the number before we lift a tool. Small repairs typically start in the low hundreds; a full single-ply or EPDM replacement is priced per square metre plus upstands, outlets and any timber deck renewal. Do you offer emergency call-outs in Dereham?+Yes — for active leaks, storm damage and wind-lifted membranes we prioritise Dereham customers within our operating hours (Mon–Sat 7am–6pm). We'll get a temporary weatherproof cover in place and quote the permanent repair separately. There are no call-out fees. Are you insured and accredited to work in Dereham?+Yes. Full Public and Employer's Liability insurance, and we're a Sika Plan Approved Installer — meaning Sika inspect our workmanship and back the membrane guarantee. That accreditation applies to every Dereham job the same as anywhere else we work. Who will actually turn up at my Dereham property?+Neil, the owner, personally surveys, quotes and installs every job. You won't get passed to a call centre, a sales rep or a subcontracted crew. One point of contact from first call to final sign-off — and the person who quoted it is the person on the roof. Nearby areas ## We also cover these areas close to Dereham. Norfolk Flat Roofing in Wymondham Sika Plan Approved flat roof installers across Wymondham and the surrounding NR18 postcodes. Free surveys, fixed written quote in 3–4 days, 20-year product / 10-year workmanship guarantee. Norfolk Flat Roofing in King's Lynn Sika Plan Approved flat roof specialists across PE30–PE34. Free surveys, no call-out fees, fixed written quote in 3–4 days — from a specialist, not a generalist. County overview Flat Roofing in Norfolk (county overview) Sika Plan Approved flat roof specialists working right across Norfolk. Free surveys, fixed written quote in 3–4 days, 20-year product / 10-year workmanship guarantee. Or see the full list of areas we cover across Norfolk, Suffolk and Cambridgeshire — or head back to the home page. One next step ## Get a fixed written quote for your Dereham flat roof — 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. 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