24/7 Emergency Call-Outs info@goliathroofing.co.uk·0800 009 6010 Services Roofing (All Services)Flat Roof Replacement & RepairRidge Installation (Dry & Mortar)Roof InspectionsLead Flashing Install & RepairRoof Leak RepairRoof InstallationChimney RepairTile, Batten & Membrane Replacement Areas YorkEasingwoldThirskRiponWetherbyTadcasterPocklingtonMaltonDunningtonHaxbyHuntingtonHeslingtonCopmanthorpeEscrickWheldrakeElvingtonBishop WiltonMillingtonSherburn in Elmet About AboutReviews Our WorkContact24/7 Line0800 009 6010Request Free Quote CallGet Free Quote Flat Roofing Specialists · York & North Yorkshire # Flat Roof Replacement& Repair in York,Built to Outlast the Weather. Ponding water, blistered felt, split seams; we strip the causes back to deck and rebuild a flat roof that stops leaking and stays stopped. Fixed-price quotes. Free inspections. 10-year workmanship guarantee on full replacements. Request Free Quote Call 0800 009 6010 Free inspection · Fixed-price quote · Written 10-year guarantee on full installations Free Standard Inspections Fixed-Price Every Quote, Always 10-Year Workmanship Guarantee* £2M Public Liability *On full installations. Minor repairs carry a 5-year workmanship guarantee. 24/7 emergency call-outs across York & North Yorkshire. Overview ## The work, plainly explained. ### What it is Flat roofing covers everything from a small back-addition extension to a full commercial deck: single-ply membranes, high-performance felt systems and liquid-applied coatings. We repair failed flat roofs and, where the deck or falls have gone beyond repair, strip and rebuild them properly. ### Who it's for Homeowners with a leaking rear extension, a garage roof past its life expectancy, or a dormer that's failed. Landlords and commercial property owners in York, Thirsk and across North Yorkshire dealing with tenanted units or leaking outbuildings. ### When it's needed Standing water more than 24 hours after rain. Visible blisters, splits or bald patches. Interior staining at ceiling corners. Any flat roof pushing past 15–20 years on felt, or where a previous 'repair' has failed within a season. ### Why professional work matters Flat roofs fail from the details, upstands, drips, laps and outlets, long before the field membrane gives up. Getting those details right is the difference between a five-year fix and a twenty-five-year one. That's specialist work, not general building work. If it's left ## What actually happens when this gets ignored. None of this is scare-copy. It's what we see, week in, week out, on roofs across York and North Yorkshire that were left one winter too long. ### Ceiling collapse & timber rot A slow flat-roof leak rots joists and decking from above. By the time the ceiling stains through, the structure underneath is already compromised, and the repair bill has multiplied. ### Insulation saturation Wet insulation loses its thermal value permanently. You pay for it twice: once to replace it, and again in heating bills every winter until you do. ### Repeat 'patch' failures A tube of mastic on a split seam buys you weeks, not years. Every failed patch damages the surrounding membrane and shortens the roof's remaining life. ### Interior damage cascade Plaster, decoration, flooring, electrics, a persistent flat-roof leak takes them all out in sequence. The roof is always the cheapest part of the repair. Our process ## Five steps. No surprises. The same process on every job, a two-tile repair or a full re-roof. Predictable, priced, guaranteed. 01 ### Free Inspection We attend the property, physically get on the roof where safe, and take photographs of every relevant defect. No sales pitch, a clear read of what's actually happening up there. 02 ### Written Diagnosis You receive a plain-English breakdown of what's failed, why it's failed, and the options for putting it right. No jargon, no scare tactics. 03 ### Fixed-Price Quote One price in writing. No day rates, no timesheets, no creeping scope. What we quote is what you pay, even if the job takes longer than expected. 04 ### Scheduled Works A firm start date and a clear plan of works. Larger jobs run on stage payments; smaller jobs are paid on completion. Bank transfer or cash. 05 ### Handover & Guarantee Site cleared, materials removed, photographs of the completed work supplied, and your written workmanship guarantee issued on the day of completion. Why it's worth doing right ## What you actually get. Specific, measurable outcomes, not vague reassurance. ### One price, in writing Every flat roof is quoted at a fixed price after a physical inspection. No day rates, no 'extras' invoiced later. ### Correct falls, correct details We rebuild falls where they've slumped and get the upstands, drips and laps right, the details that actually keep water out. - ### 10-year workmanship guarantee Every full flat roof replacement carries a 10-year workmanship guarantee, issued in writing on completion. ### Long service life Correctly specified and installed EPDM, GRP and high-performance felt systems routinely deliver 20–30 years of service. We install for that horizon, not the next resale. ### Site left clean Old membrane, timber offcuts, packaging and skips managed and removed. The property looks better than we found it. ### £2M public liability Every job, repair or full replacement, is carried out under £2,000,000 of public liability insurance cover. The detail ## What proper looks like. Materials, methods, standards, and the honest answers to the questions most people don't get told the truth on. Speak to a Roofer ### Materials & systems we install Modern flat roofing has moved well beyond old-style mineral felt. On residential work we typically specify high-performance torch-on felt systems (three-layer, polyester-reinforced), EPDM rubber membranes for garages, dormers and back additions, and GRP fibreglass laminates where a seamless, foot-trafficable finish is needed. For commercial and larger deck areas we work with single-ply membranes. Each system has a right and a wrong application, a garage roof is not a warehouse deck, and the specification changes accordingly. We recommend the system that suits the substrate, the falls, the exposure and the intended service life, and we tell you honestly when a cheaper option will cost you more inside a decade. ### Repair vs full replacement Not every failing flat roof needs stripping. A localised split, a lifted lap or a failed upstand can often be repaired properly and give another decade of service. What can't be repaired is a roof where the deck is soft underfoot, where insulation is visibly saturated, where multiple areas have failed at once, or where the falls have slumped so badly that water can never truly drain. In those cases repair is a false economy, you pay for scaffolding and access to buy months, then pay for it again. We tell you honestly which category your roof falls into after inspection. ### Getting the details right Flat roofs almost never fail in the middle. They fail at the edges, where the membrane meets the wall, the parapet, the outlet, the skylight, or the abutment with a pitched roof. Correct upstand heights (typically 150mm minimum), properly formed drip edges, welted laps, correctly bonded outlet flanges and the right flashing detail at every abutment are what separates a roof that lasts from one that leaks in the first winter. We build those details to current best practice, not shortcut them because they take longer. ### Residential vs commercial work Domestic flat roofs, extensions, dormers, porches, garages, are typically smaller, more detail-heavy, and often overlooked between building trades. Commercial roofs are larger, simpler in run, but usually have more penetrations (vents, plant, rooflights) and stricter access and safety requirements. We handle both. On commercial work we can programme around occupied premises, tenanted units and business hours where needed. ### Insulation & building regulations Any full flat roof replacement in England now triggers Building Regulations upgrades to the thermal element. That usually means adding a layer of PIR insulation to bring U-values up to current standards. We factor this into the quoted price rather than treating it as an extra, you shouldn't discover a £900 addition on day three of the job. FAQ ## Everything people ask us. Can't see your question? Call us on 0800 009 6010, 24/7. How much does a flat roof replacement cost in York?+−Every flat roof is different, size, access, current deck condition, insulation upgrade and chosen membrane all change the number. We give a fixed written price after a free physical inspection so you know exactly what you're paying before any work starts. We don't publish prices online because it would be guesswork. How long does a flat roof replacement take?+−A typical garage or single-storey extension roof is 1–3 days on site. Larger areas or commercial decks take longer. We give you a firm number of days at the quote stage, not a range. What guarantee do you give on flat roofs?+−Full flat roof replacements carry a 10-year workmanship guarantee, issued in writing on completion. Minor repairs to an existing flat roof carry a 5-year workmanship guarantee. How long should a properly installed flat roof last?+−A correctly specified EPDM or three-layer torch-on system, installed to current best practice, will routinely deliver 20–30 years of service. GRP laminates can last longer again. Life expectancy drops sharply when details or falls are wrong, which is why we quote to do the whole job properly rather than patch. Can you repair rather than replace?+−Where it makes sense, yes. If the deck is sound and the failure is localised, a split, a lifted lap, a failed upstand, we'll repair it and tell you honestly how long that repair will hold. If the whole roof is at end of life, we'll say so. Do you handle emergency flat roof leaks?+−Yes. We cover 24/7 emergency call-outs across York and North Yorkshire. Call 0800 009 6010 to make the roof watertight and stop further interior damage. Do you work on commercial flat roofs?+−Yes, commercial and industrial units, offices, retail and outbuildings. We can programme work around occupied premises and business hours where required. Is the price you quote actually fixed?+−Yes. Every quote is a fixed price in writing. No day rates, no unexpected 'extras', no timesheet invoicing. If the job takes longer than we expected, that's our problem, not yours. Related services Roof Leak Repair - Roof Inspections - Roof Installation & Re-Roofs - Browse all roofing services Areas we cover Roofers in York Roofers in Easingwold Roofers in Thirsk Roofers in Ripon Roofers in Wetherby Roofers in Tadcaster Roofers in Pocklington Roofers in Malton Roofers in Dunnington Postcode not listed but nearby? Call; we cover most of North Yorkshire on request. Book a free inspection ## One call.A firm price in writing.Guaranteed workmanship. Free standard inspection. Fixed-price quote, no day rates, no surprises. Written workmanship guarantee on completion. 24/7 emergency response across York & North Yorkshire. £2M Insured 24/7 Emergency Written Guarantee Call 0800 009 6010Request Free Quote Ready when you are ### Get your fixed-price quote, free, no obligation. 0800 009 6010Request Estimate Residential and commercial roofing specialists covering York, Thirsk and North Yorkshire. Fixed-price quotes, free inspections and workmanship guarantees on every job. Sherburn in Elmet 0800 009 601007576 354855info@goliathroofing.co.uk£2M Public Liability Cover Services - Roofing (All Services) - Flat Roof Replacement & Repair - Ridge Installation - Roof Inspections - Lead Flashing - Roof Leak Repair - Roof Installation - Chimney Repair - Tile, Batten & Membrane Service Areas - York - Easingwold - Thirsk - Ripon - Wetherby - Tadcaster - Pocklington - Malton - Dunnington - Haxby - Huntington - Heslington - Copmanthorpe - Escrick - Wheldrake - Elvington - Bishop Wilton - Millington - Sherburn in ElmetYour area not listed? We do travel further afield, so please enquire to see if we can help. Company - About - Our Work - Reviews - Contact - Terms & Conditions - Privacy Policy - Cookie Policy © 2026 Goliath Roofing. All rights reserved. Residential & Commercial Roofing Specialists | York · Thirsk · North Yorkshire We use essential cookies to run this site and, with your consent, analytics cookies to improve it. See our Cookie Policy. AcceptReject