07766 878193Open 24 hours (call-out fee applies after 5pm) AboutServicesRoof replacementA full re-roof priced as one fixed figure before we lift a tile, carried out by the same three-man team from strip-out to final clear-up, and guaranteed for 25 years on workmanship. You get a dry, finished roof and a price that does not move.Flat roofingThree-layer torch-on felt systems fitted by roofers who lay them week in, week out, with the falls, upstands and detailing that decide whether a flat roof drains or ponds. Fixed price agreed first, hot-works insured, 25-year workmanship guarantee.Roof repairsFrom a single slipped tile to a leak nobody else has found, we diagnose the cause instead of sealing the symptom, then fix it for a fixed price agreed before we start. Contactable 24 hours a day when it can't wait.Lead workThe junctions are where roofs leak, and lead is what stops them. Code-appropriate flashings, valleys, chimney lead and lead flat roofs, cut in and dressed on site, not sealed over with mastic. Fixed price agreed first.Chimney workStacks take more weather than any other part of the roof and get looked at least. We repair, repoint, re-flaunch and re-lead them, or take them down and make good, for one fixed price agreed before we start.RepointingRidges, verges, stacks and brickwork raked out and pointed in the right mortar, not skimmed over the top. It's the cheapest work on the roof and the work that prevents the most expensive damage.GutteringOverflowing, sagging or split guttering puts water down the elevation instead of into the drain, and stained brickwork is the cheapest thing it damages. Replacement, repairs and downpipes at a fixed price agreed first.Fascias & soffitsThe roofline is where the roof, the gutter and the wall all meet, and where rot, wasps and wind-driven rain all get in when it fails. Renewed properly, with ventilation designed in, at a fixed price agreed first.Roof surveysA roofer's verdict in writing on what the roof is actually doing: what has failed, what is about to, and what it will realistically cost. A paid service, separate from our free quotes, so the report answers to you and nothing else.Small building workThe brickwork, making good and general building jobs that sit alongside a roof, handled by the same team, on the same scaffold, under the same fixed price. No second trade to chase, no gap between who does what. AreasTwickenhamRichmondTeddingtonHamptonFelthamIsleworthHounslowKingston upon ThamesWorthingChichesterBrightonHorshamCrawleyBurgess HillShoreham-by-SeaLittlehamptonHaywards HeathBognor RegisHove Our workReviewsContact07766 878193Get a free quote Menu - Home - / - Services - / - Flat roofingBased in Twickenham · serving South West London & West Sussex # Flat roofingand torch-on feltdone to last Three-layer torch-on felt systems fitted by roofers who lay them week in, week out, with the falls, upstands and detailing that decide whether a flat roof drains or ponds. Fixed price agreed first, hot-works insured, 25-year workmanship guarantee. Get my free quote07766 878193 £2m public liability · fixed pricing, never day rates · free quotes ## Book a free quote Tell us the postcode and the problem. We'll do the rest. 3-layerTorch-on felt build-up as standard 25 yrsWorkmanship guarantee £2mPublic liability FixedWritten price before work starts The service ## Torch-on felt, fitted as a system rather than a covering Flat roofing is what covers extensions, dormers, garages, porches, balconies and most commercial roofs. Ours is built as a three-layer torch-on felt system: a vapour-control or base layer, an intermediate layer, and a mineral-finished cap sheet, each bonded with heat so the roof becomes one continuous waterproof skin rather than sheets sitting next to each other. It suits anyone with a flat area that leaks, ponds, blisters or has simply aged out, and anyone building an extension who wants the roof over it to outlast the plaster. Flat roofs fail far more often from bad detailing than bad material, so most of the work is in the parts you never see: the falls, the upstands, the drip edges and the junction with the pitched roof or wall alongside. It is a job worth handing to a roofer rather than a general builder for one blunt reason. Torch-on felt is hot work: an open gas torch, on a timber deck, against your building. We carry £2 million public liability insurance, we prepare and protect the area before a torch is lit, and we build the system to a specification instead of improvising it. - ### Who it's for Homeowners with extensions, dormers, garages and porches, plus commercial property owners with larger flat areas. - ### When it's needed Ponding water, blisters or splits, felt lifting at the edges, damp on the ceiling below, or a covering that has gone brittle and lost its mineral finish. - ### What you get A three-layer torch-on system with correct falls, dressed upstands, new drip edges and trims, and 25 years of workmanship guarantee. What it costs to leave it ## Flat roofs fail quietly, then all at once Water sits on a flat roof instead of running off it, so a small defect gets tested continuously rather than briefly. By the time it shows on the ceiling, the deck underneath has usually been wet for months. - ### A rotten deck, not just a wet one Ply and timber decks soak, swell and delaminate. Once that happens the covering is no longer the only thing being replaced, and the price goes up with it. - ### Ponding that widens every split Standing water finds hairline cracks, freezes in them, and opens them. Roofs laid without falls do not stay watertight for long, whatever they are covered in. - ### Damage to the room below Extensions and dormers are usually habitable rooms. Ceilings, insulation, decoration and flooring all get replaced because a roof covering was left another season. - ### Fire risk from careless hot works Torch-on felt applied without preparation, protection or the right insurance is a genuine hazard to the building. It is not a job to hand to whoever is cheapest. ### Common mistakes - Patching over a wet deck, the new felt sticks to a substrate that is already failing. - Painting on liquid coatings as a permanent fix for a covering that has structurally failed. - Laying a flat roof with no fall, so water ponds and works at every joint. - Skipping the upstand height where the flat roof meets a wall, so driving rain gets behind it. - Using a builder without hot-works cover, leaving you exposed if anything goes wrong. Our process ## How the job runs, step by step 01 ### Free inspection We get on the roof, check the falls, the outlets, the upstands and how solid the deck feels underfoot, and look at the ceiling below for where water is actually arriving. 02 ### Diagnosis You get told plainly whether the deck is sound, whether this is a repair or a re-cover, and what caused the failure, because the same cause will finish off a new roof too. 03 ### Fixed price agreed One written figure covering strip-out, deck repairs where needed, the full three-layer system, trims and waste removal. No day rates. 04 ### Strip and prepare Old covering off, deck inspected and repaired or replaced as agreed, falls corrected with firrings where required, and the area protected before any hot works begin. 05 ### Torch-on installation Base layer, intermediate layer and mineral cap sheet fully bonded, with upstands dressed to height, drip edges and trims fitted and outlets detailed in. 06 ### Test, clear and guarantee We check the falls run to the outlets and the laps are sound, clear the site, and back the workmanship for 25 years. What you get ## The difference it makes ### A single bonded skin Three layers torched together behave as one membrane, so there is no loose seam waiting to be found by standing water. ### Water that actually leaves Falls corrected at deck level and outlets detailed properly, so the roof drains instead of holding puddles until the next split. ### Proven, repairable, affordable Torch-on felt has a long track record, costs less than most single-ply alternatives, and can be locally repaired years later without replacing the roof. ### Hot works done safely Prepared, protected and covered by £2m public liability, not a torch and hope. ### Fixed price, no drift Deck repairs are agreed before they happen, so the figure you accepted is the figure you pay. ### 25-year workmanship guarantee The same guarantee as our pitched work, on the roof type most likely to be skimped elsewhere. In detail ## The three-layer system, and where it goes Flat roofing is a detailing trade. The felt is the easy part; the falls, upstands, outlets and junctions are what keep the room below dry over a lifetime of Sussex weather. ### How the build-up works The first layer goes down over a prepared deck and controls vapour and movement. The intermediate layer builds thickness and redundancy. The mineral-finished cap sheet takes the UV, the rain and the foot traffic, and is the layer you can see. Each is heat-bonded, with laps run in the direction of the fall so water always crosses a joint the safe way. Over an unsound deck none of that matters, which is why we check and repair the deck first. New ply, firrings to create or correct the fall, and secure fixing back to the joists all happen before the first roll is unwrapped. ### Upstands, trims and junctions Where a flat roof meets a wall, a dormer cheek or a pitched roof, the covering has to turn up and be terminated properly. Upstands are carried to a sensible height and finished with lead flashing or a proper termination bar rather than a bead of sealant. Edges get drip trims and welted detail so rainwater is thrown clear into the gutter instead of tracking back under the covering and into the fascia. Outlets and rainwater pipes are dressed into the membrane, not simply bedded against it. ### Where we fit it Torch-on suits almost any flat or low-pitch area on domestic and commercial buildings. Some are jobs of a morning; some run for days. - Rear and side extensions - Dormer roofs and dormer cheeks - Garages, outbuildings and workshops - Porches and bay roofs - Balconies and walk-on areas - Commercial units and flat sections of larger roofs ### Repair or re-cover? Not every flat roof needs replacing. A localised split, a lifted lap or a failed upstand on an otherwise sound covering can be cut in and repaired, and we will say so rather than sell a whole roof. Where the mineral finish has weathered away across the roof, blisters have spread, or the deck feels soft underfoot, a re-cover is the honest answer, a repair to a covering that has failed as a whole is money spent twice. ### Residential and commercial differences On houses, the flat roof is usually small, closely surrounded by other elements, and sits over a room in daily use. The detailing at the junctions matters more than the area of felt, and access is often through a garden. Commercial flat roofs are larger, carry plant, vents and service penetrations, and often need to stay in use throughout. Every penetration is a potential leak, so each is detailed individually, and work is phased so no section is left unfinished overnight. ### Coastal exposure in Sussex Roofs at Worthing, Shoreham-by-Sea, Littlehampton, Hove and Brighton take salt-laden wind that inland properties never see. Edges and terminations are where that wind does its work, get them wrong and the covering peels rather than leaks. We specify fixings and terminations with the exposure of the site in mind, and pay particular attention to verge and drip detailing on exposed elevations. Where we work ## Flat roofing across West Sussex & Brighton If your town isn't listed, call anyway; we're usually nearby. - Twickenham - Richmond - Teddington - Hampton - Feltham - Isleworth - Hounslow - Kingston upon Thames - Worthing - Chichester - Brighton - Horsham - Crawley - Burgess Hill - Shoreham-by-Sea - Littlehampton - Haywards Heath - Bognor Regis - Hove Related services ## Often done at the same time - Roof repairs - Lead work - Guttering - Roof replacementSee all roofing services, go back to the homepage, or contact us for a free quote. Straight answers ## Flat roofing questions How much does a new flat roof cost?It depends on the area, the state of the deck underneath, access and how many upstands and penetrations the roof has. We price each roof after looking at it, and we give you one fixed written figure before starting, never a day rate. How long does a flat roof take to fit?A garage, porch or small extension roof is often a day or two. Larger or more detailed roofs, and any that need substantial deck replacement, take longer. Torch-on needs dry conditions, so heavy rain moves the date rather than the standard. How long does torch-on felt last?A properly laid three-layer system with correct falls is a long-term covering, and it stays repairable throughout its life. What shortens it is ponding water, poor upstands and thin build-ups, all things we address at the deck stage. Is torch-on felt better than a liquid or rubber system?Three-layer torch-on is what we fit day in, day out, and doing one system properly beats dabbling in several. It is proven, cost-effective and locally repairable years later, which matters when a single penetration starts leaking. Is the hot-works part safe on my house?It is when it is prepared for. We protect the surrounding area, keep the torch away from combustible detail, and carry £2 million public liability insurance. Can you repair my flat roof instead of replacing it?Often, yes. A localised split, lifted lap or failed upstand on an otherwise sound covering can be cut in and repaired. If the covering has failed across the roof, we will tell you that rather than take money for a patch. My flat roof holds water after rain, is that a problem?Yes. Ponding means the falls are wrong, and standing water will find every weak point. We correct the falls with firrings at deck level rather than laying new felt over the same puddle. Can I walk on it?Light maintenance access is fine on a mineral cap sheet. If the roof is a balcony or a regular walkway, tell us at the quote stage so we can specify it as a walk-on area. Do you fit flat roofs on commercial buildings?Yes. We work on both domestic and commercial roofs, detail around plant and service penetrations, and phase larger jobs so the building stays usable and nothing is left open overnight. What does the guarantee cover?25 years on our workmanship. It excludes storm damage, damage caused by third-party works and material failure, which sits under the manufacturer's own guarantee. Do you handle emergency flat-roof leaks?We are contactable 24 hours a day, with a call-out fee for emergency and out-of-hours work after 5pm. Free, no-obligation quote ## Get your flat roof priced properly Send us the postcode and what it's doing, ponding, blistering, leaking, and we'll come out, check the deck and give you one fixed figure. Free, and no pressure at the end of it. 07766 878193Or email bwroofing1@icloud.com · Based in Twickenham · serving South West London & West Sussex Read our customer reviews - 25-year workmanship guarantee - £2m public liability - Fixed price, never day rates Twickenham-based roofers, covering South West London and West Sussex since 2019. Fixed prices, free quotes and a 25-year workmanship guarantee on new roofs. - 07766 878193 - bwroofing1@icloud.com - Based in Twickenham · serving South West London & West Sussex - ### Services Roof replacement - Flat roofing - Roof repairs - Lead work - Chimney work - Repointing - Guttering - Fascias & soffits - Roof surveys - Small building work ### Areas we cover - Twickenham - Richmond - Teddington - Hampton - Feltham - Isleworth - Hounslow - Kingston upon Thames - Worthing - Chichester - Brighton - Horsham - Crawley - Burgess Hill - Shoreham-by-Sea - Littlehampton - Haywards Heath - Bognor Regis - Hove ### Company - About us - Our work - Reviews - Areas - Services - Contact - Privacy policy - Terms & conditions © 2026 BW Roofing Solutions. Bailey, Owner. £2m public liability insurance · Member, Confederation of Roofers Association 07766 878193Free quote