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 - Norwich Norfolk · Based in Norwich NR5 · We cover the whole city # Flat RoofingSpecialists inNorwich Sika Plan Approved installers based in NR5. Free surveys, fixed written quotes in 3–4 days, and a 20-year product / 10-year workmanship guarantee — right across the city. Get my free fixed-price quote 07447 188036 Same-week survey — typically 2–3 working days across NR postcodes · 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 Norwich — properly. Norwich is home. We're based on Gilbard Road in NR5 and the majority of our week is spent inside the ring road — from the terraces of the Golden Triangle to the interwar semis in Thorpe St Andrew, Costessey, Hellesdon, Sprowston and Eaton. Between commercial single-ply subcontracting and running GNB, Neil has seen most of the city's roof types and streets — the calls that come in are rarely about something new. ### Where we cover in Norfolk We cover every NR postcode inside the city and the immediate ring: NR1, NR2, NR3, NR4, NR5, NR6, NR7, NR8, NR14 and the surrounding villages — Cringleford, Thorpe, Trowse, Hethersett, Wymondham, Rackheath and Poringland included. Central Norwich jobs are usually surveyed within the same week. ### Response times Same-week survey — typically 2–3 working days across NR postcodes. Emergency leaks and storm damage are prioritised within our operating hours (Mon–Sat 7am–6pm). ### Norwich property types we know Victorian and Edwardian terraces with felted rear-extensions and outriggers, 1930s bay-fronted semis with tile-and-felt porch canopies, 1960s–70s bungalows with large single-ply or asphalt flat sections, and post-2000 new-build estates with warm-deck flat dormers. On the commercial side we work on shopfronts on Magdalen Street and St Benedicts, small offices along Riverside, and light-industrial units on Vulcan Road and Hurricane Way. ### Common jobs in Norwich In Norwich the recurring calls are: leaking felt on rear kitchen extensions, splits and blisters on 1970s asphalt garages, tired GRP porches that have crazed and gone porous, sagging bay-window tops on Victorian terraces, and full replacement of end-of-life flat roofs where the deck itself has softened. We also fit a lot of UPVC fascias, soffits and guttering on the 1930s stock in Thorpe and Eaton where the timbers have finally rotted through. Services in Norwich ## Every service we offer is available in Norwich. ### Flat Roof Installation New-build and extension flat roofs in Norwich, 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 Norwich. EPDM, Sika Plan or Resitrix. View service ### Flat Roof Repairs Leaks, splits, blisters and storm damage fixed on Norwich 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 Norwich. 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 Norwich. Mechanically fixed to wind-uplift spec. View service ### Commercial Flat Roofing Retail, office, light-industrial and agricultural flat roofs across Norwich. Fully insured, Sika Plan Approved workmanship. View service ### Fascias & Soffits (UPVC) UPVC fascias and soffits fitted in Norwich — sealed, ventilated properly, and finished to match your roofline. View service ### Guttering & Bargeboards Full guttering and bargeboard runs in Norwich. UPVC systems rated for the exposure your property actually sees. View service ### Cladding — UPVC, Timber-Effect & Composite UPVC, timber-effect and composite cladding across Norwich — low-maintenance, weather-tight, and finished properly at corners and abutments. View service Why Norwich customers use us ## The concrete reasons — not a mission statement. ### Based in Norwich, not travelling to it Our yard and office are in NR5. That means faster surveys, faster returns to snag anything, and no travel-time being loaded into your quote. ### Every era of Norwich housing stock covered Neil has installed on Victorian terraces through to modern new-build across the city. When he says the deck will need renewing, or that a warm-roof build-up will actually solve the condensation you keep getting, it's from experience — not a guess. ### Sika Plan Approved, locally Being an approved installer isn't a badge on the van — it's an audit trail. Sika inspect our work and back the membrane, which is why we can offer a 20-year product / 10-year workmanship guarantee on the systems we install in Norwich. ### You deal with Neil directly First call, survey, quote, installation, sign-off, aftercare. One phone number, one person, one job at a time. Local conditions ## What actually goes wrong on Norwich roofs. ### Older housing stock, older detailing A huge share of Norwich's flat roofs sit on Victorian rear extensions and 1930s outriggers. Original detailing was felt over unventilated timber — so blistering, ponding and hidden deck rot are near-universal. We strip back to the deck, check for softening, and specify a warm-roof build-up that meets current Part L rather than just patching over the failure. ### Damp North Sea weather and prevailing wind Norwich sits at the east end of a long, flat run from the coast. Wind-driven rain from the north-east lifts poorly-bonded felt and finds any un-dressed upstand. We mechanically fix Sika Plan and Resitrix membranes to spec, dress every abutment and cap flashing properly, and use wind-uplift-rated fixings on exposed roofs in Thorpe End and Sprowston. ### Restricted access in the terraces Golden Triangle and Riverside properties often mean no side access — everything through the house. We plan skip drops, tarp-protect internals, and stage materials to the rear via the house without dust or disruption. Where scaffold is needed for a two-storey rear extension we co-ordinate the drop-off directly with your neighbour. ### Conservation and listed considerations Parts of NR2 and NR3 fall inside conservation areas. Where a flat roof is visible from a public frontage or sits on a listed building, we use membrane colours and detailing that keep the planners happy — and we won't start a job that needs consent until that consent is in writing. Our process ## A predictable path from first call to guaranteed sign-off. - 01 Free on-site survey We visit your Norwich 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 Norwich ## Questions we answer at almost every Norwich survey. Do you serve central Norwich including NR1, NR2 and NR3?+Yes — the majority of our jobs are inside the Norwich ring. That includes the city centre, Golden Triangle, Thorpe Hamlet, Mile Cross, Heigham and the terraces around Unthank Road and Earlham Road. Central-Norwich access constraints are second nature to us. How quickly can you get to a leak in Norwich?+For active leaks inside the NR ring we aim for a first look within 2–3 working days during operating hours (Mon–Sat 7am–6pm) and can put a temporary weatherproof cover in place on the same visit. The permanent repair or replacement is then quoted in writing within 3–4 days. Can you handle listed buildings or conservation-area flat roofs in Norwich?+Yes. We work on a lot of properties in Norwich's conservation areas. Where the flat roof is visible or the building is listed, we discuss membrane colour, detail choice and upstands so nothing you install now becomes a problem with the council later. How much does a flat roof cost in Norwich?+We don't quote by rate card because no two Norwich 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 Norwich?+Yes — for active leaks, storm damage and wind-lifted membranes we prioritise Norwich 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 Norwich?+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 Norwich job the same as anywhere else we work. Who will actually turn up at my Norwich 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 Norwich. Norfolk Flat Roofing in Thorpe St Andrew & Sprowston Sika Plan Approved flat roof installers across Thorpe St Andrew & Sprowston and the surrounding NR7 postcodes. Free surveys, fixed written quote in 3–4 days, 20-year product / 10-year workmanship guarantee. Norfolk Flat Roofing in Hellesdon Sika Plan Approved flat roof installers across Hellesdon and the surrounding NR6 postcodes. Free surveys, fixed written quote in 3–4 days, 20-year product / 10-year workmanship guarantee. Norfolk Flat Roofing in Cringleford Sika Plan Approved flat roof installers across Cringleford and the surrounding NR4 postcodes. 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 Norwich 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. AcceptReject