--- title: "Flat Roofing Wirral & Merseyside | EPDM, GRP & Felt | RTC Roofing" description: "Modern flat roofing across Wirral, Merseyside, Chester and North Wales — EPDM, GRP fibreglass and high-performance felt. 10-year insurance-backed guarantees on full installs." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "RoofingContractor", "name": "RTC Roofing Contractors Ltd", "alternateName": "RTC Roofing", "image": "/favicon.png", "url": "/", "telephone": "0800 043 1108", "email": "info@rtcroofing.co.uk", "priceRange": "££", "address": { "@type": "PostalAddress", "streetAddress": "Unit 4, Links Business Park, Carr Lane Industrial Estate, Carr Lane, Hoylake", "addressLocality": "Wirral", "postalCode": "CH47 4AX", "addressCountry": "GB" }, "geo": { "@type": "GeoCoordinates", "latitude": 53.3909156, "longitude": -3.1768538 }, "areaServed": [ { "@type": "Place", "name": "Merseyside" }, { "@type": "Place", "name": "Wirral" }, { "@type": "Place", "name": "Chester" }, { "@type": "Place", "name": "North Wales" } ], "openingHoursSpecification": [ { "@type": "OpeningHoursSpecification", "dayOfWeek": [ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ], "opens": "07:00", "closes": "18:00" } ], "sameAs": [ "https://www.instagram.com/rtcroofingcontractorsltd/", "https://share.google/IWGxWMPtc8AninQNT", "https://share.google/we7vxfLso3eFetPOA" ], "founder": "Mark O'Neill", "foundingDate": "2013-01-01" }, { "@context": "https://schema.org", "@type": "Service", "serviceType": "Flat Roofing", "name": "Flat Roofing — RTC Roofing Contractors Ltd", "description": "Modern flat roofing across Wirral, Merseyside, Chester and North Wales — EPDM, GRP fibreglass and high-performance felt. 10-year insurance-backed guarantees on full installs.", "areaServed": [ "Merseyside", "Wirral", "Chester", "North Wales" ], "provider": { "@type": "RoofingContractor", "name": "RTC Roofing Contractors Ltd", "telephone": "+448000431108", "email": "info@rtcroofing.co.uk", "address": { "@type": "PostalAddress", "streetAddress": "Unit 4, Links Business Park, Carr Lane Industrial Estate", "addressLocality": "Wirral", "postalCode": "CH47 4AX", "addressCountry": "GB" } } }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How long does a modern flat roof last?", "acceptedAnswer": { "@type": "Answer", "text": "EPDM and GRP roofs installed to specification typically last 20–25+ years. High-performance felt lasts 15–20 years. The 1970s pour-and-roll felt many people are replacing lasted 8–12." } }, { "@type": "Question", "name": "How much does a flat roof cost?", "acceptedAnswer": { "@type": "Answer", "text": "A single-garage EPDM replacement is priced on a fixed, itemised written quote after a free inspection — every job varies by pitch, access, materials and scope. A large extension in GRP is priced on a fixed, itemised written quote after a free inspection — every job varies by pitch, access, materials and scope. Every quote is fixed-price and itemised." } }, { "@type": "Question", "name": "Can you replace my roof in one day?", "acceptedAnswer": { "@type": "Answer", "text": "A single garage in dry weather — yes. Extensions and complex roofs are 2–4 days depending on upstand detail and roof lantern presence." } }, { "@type": "Question", "name": "Do I have to strip the old roof?", "acceptedAnswer": { "@type": "Answer", "text": "Almost always, yes. Overlays trap moisture, hide deck rot and void most manufacturer warranties. We only overlay where the existing deck and membrane are demonstrably sound." } }, { "@type": "Question", "name": "What guarantee do you offer?", "acceptedAnswer": { "@type": "Answer", "text": "10-year HomePro insurance-backed guarantee on qualifying full installations, plus manufacturer product warranties." } }, { "@type": "Question", "name": "Will the new roof match the height of my extension?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — a warm-roof upgrade typically raises finished level by 100–140mm, allowed for in the design and detailed at upstands and abutments before quoting." } }, { "@type": "Question", "name": "Are you insured?", "acceptedAnswer": { "@type": "Answer", "text": "£5M public liability and £5M employers' liability with Covéa Insurance plc." } }, { "@type": "Question", "name": "Do you provide emergency flat-roof repairs?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — for splits and active leaks, call 07727 254394 for a same or next-day make-safe." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "/services" }, { "@type": "ListItem", "position": 3, "name": "Flat Roofing", "item": "/services/flat-roofing" } ] } ] --- [0800 043 1108 ](tel:+448000431108)| [Out of hours: 07727 254394 ](tel:+447727254394)| [Mobile: 07722 733343 ](tel:+447722733343) Mon–Sat 7am–6pm · Sun closed · Emergency call-out [Instagram](https://www.instagram.com/rtcroofingcontractorsltd/) [![RTC Roofing Contractors Ltd](/__l5e/assets-v1/65b5a778-eabc-413b-a0c8-42887cc004ca/rtc-logo.webp)](/) About Services Areas [Our Work](/our-work)[Finance](/finance)[Contact](/contact) [0800 043 1108 ](tel:+448000431108)[Get Free Quote](/contact) [ ![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/ddc3da0b-e646-4ced-9205-a887b04498f5/banner-black.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/7e66dcd9-acbd-4341-b28f-f71e3683b2e4/banner-blue.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/c06ff9ef-fac0-4225-b7bb-738d3821baf7/banner-green.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/f38068b1-5d83-41bd-8646-b89ad8c3e374/banner-orange.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/efcc391f-e002-429c-a0c4-c563dd643384/banner-pink.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/9eca32a0-2a4f-4cf9-9980-1377156a9c3d/banner-purple.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/e4dda072-2050-46a9-821f-f612f130e5af/banner-red.png)![Finance Available with iDeal 4 Finance](/__l5e/assets-v1/db1f3d5e-a250-4832-9df2-36fd6d4435d6/banner-yellow.png) ](/finance) ![Newly installed seamless GRP fibreglass flat roof by RTC Roofing over a rear bay extension, Wirral](/__l5e/assets-v1/dc59c5ae-9b55-4697-82a7-52c962aaeafd/WhatsApp_Image_2026-06-30_at_4.21.47_PM_6.jpeg) [← All services](/services) # Flat Roofing That Actually Stays Flat — & Watertight A properly-designed flat roof — correct fall, correct membrane, correct detailing — that sheds water for 20+ years, not one that ponds after every downpour. [Get Free Fixed-Price Quote](/contact) [0800 043 1108](tel:+448000431108) 10-year insurance-backed guarantee £5M public liability Most quotes booked within 48 hours 20+ Years experience TrustMark Government-endorsed 9.5 / 10 Fair Trades rated £5M Public liability 10-year HomePro guarantee Overview ## Flat Roofing — what, who, when & why ### What it is Full flat-roof installation and replacement in EPDM rubber, GRP fibreglass and high-performance torch-on felt. Extensions, garages, dormers, porches and commercial units. ### Who it's for Homeowners with a failing 1970s–90s felt roof over an extension or garage, self-builders finishing an extension, and landlords maintaining rental portfolios. ### When you need it When you see bubbling, splits, ponding water 24 hours after rain, moss growth on the surface, or damp on the ceiling below. ### Why professional matters Flat roofs fail because of poor falls and poor detailing, not because they are flat. A correctly falled, correctly upstood roof is a 20–25 year asset. A cheap overlay is a two-winter fix. The cost of waiting ## What happens if you leave it ### Damage escalation - Ponding water accelerates UV degradation and freezes in winter — a small split becomes a full membrane failure. - Once water is under the membrane, the deck (usually chipboard or OSB) rots quickly and the whole build-up needs stripping. - Wet insulation loses R-value permanently; you keep paying for heat you don't get. ### Common mistakes - Overlaying a failed felt roof with more felt to defer the cost — traps moisture and doubles the eventual strip-off bill. - Skipping the perimeter trim upgrade — most flat-roof failures start at the edges, not the middle. - Choosing the cheapest membrane without checking the manufacturer warranty terms. Our process ## How we deliver the work Step 1 ### Inspection Deck-condition survey, drainage check and measurement — free and without obligation. Step 2 ### Specification We recommend EPDM, GRP or felt based on span, traffic, upstands and budget, and quote fixed-price in writing. Step 3 ### Strip & deck Old covering stripped, deck inspected, wet or delaminated boards replaced with 18mm OSB or ply to correct falls. Step 4 ### Install New membrane bonded or mechanically fixed, upstands correctly formed, edge trims and drips fitted, outlets renewed. Step 5 ### Sign-off Water-test where practical, walk-around with you, and 10-year HomePro insurance-backed guarantee registered on qualifying full installs. Benefits ## What you get from booking RTC ### 20+ year design life Correctly-specified EPDM and GRP roofs typically outlast three cycles of the felt roofs they replace. ### No ponding Falls corrected during the strip-off, not left to drain to nowhere. ### Warm-roof option Upgrade to a warm-roof build-up during replacement to hit modern U-values and reduce heat loss. ### Guarantee that survives insolvency 10-year HomePro insurance-backed guarantee on qualifying installs — you're covered even if we're not. ### £5M insured Public liability and employers' liability at £5M each with Covéa Insurance plc. ### Finance available Flexible finance via iDeal 4 Finance on approved credit. The detail ## Materials, methods & specifications ### EPDM rubber Firestone-style single-sheet EPDM — no seams on typical domestic roofs up to 12m span. Bonded to a primed deck with contact adhesive, mechanically clamped at perimeter and outlets. Ideal for garages, extensions and dormers. ### GRP fibreglass Seamless in-situ laminated glass-fibre roofing with pre-formed trims. Excellent for balconies, walked-on terraces and complex shapes. See the dedicated GRP Roofing page for detail. ### High-performance torch-on felt Three-layer torch-applied felt with polyester carrier and mineral cap sheet, still the right specification for larger commercial spans where movement and thermal cycling defeat single-sheet systems. ### Falls & drainage Minimum 1:80 finished fall to outlets, checked with a level during install — not eyeballed. Outlets renewed to match the new membrane. ### Warm roof vs cold roof Warm-roof build-ups place PIR insulation above the deck and eliminate interstitial condensation. Where headroom or eaves detail prevents this, we specify a cold-roof build-up with correct cross-flow ventilation. Frequently asked ## Flat Roofing — your questions answered How long does a modern flat roof last?+ EPDM and GRP roofs installed to specification typically last 20–25+ years. High-performance felt lasts 15–20 years. The 1970s pour-and-roll felt many people are replacing lasted 8–12. How much does a flat roof cost?+ A single-garage EPDM replacement is priced on a fixed, itemised written quote after a free inspection — every job varies by pitch, access, materials and scope. A large extension in GRP is priced on a fixed, itemised written quote after a free inspection — every job varies by pitch, access, materials and scope. Every quote is fixed-price and itemised. Can you replace my roof in one day?+ A single garage in dry weather — yes. Extensions and complex roofs are 2–4 days depending on upstand detail and roof lantern presence. Do I have to strip the old roof?+ Almost always, yes. Overlays trap moisture, hide deck rot and void most manufacturer warranties. We only overlay where the existing deck and membrane are demonstrably sound. What guarantee do you offer?+ 10-year HomePro insurance-backed guarantee on qualifying full installations, plus manufacturer product warranties. Will the new roof match the height of my extension?+ Yes — a warm-roof upgrade typically raises finished level by 100–140mm, allowed for in the design and detailed at upstands and abutments before quoting. Are you insured?+ £5M public liability and £5M employers' liability with Covéa Insurance plc. Do you provide emergency flat-roof repairs?+ Yes — for splits and active leaks, call 07727 254394 for a same or next-day make-safe. Related services [ ### GRP Roofing Seamless fibreglass roofs — durable, guaranteed, no seams. Learn more ](/services/grp-roofing)[ ### Roof Repairs Fast, honest repairs — slipped slates to storm damage. Learn more ](/services/roof-repairs)[ ### Re-Roofing Pitched & flat full replacements with 10-year guarantee. Learn more ](/services/re-roofing) **Coverage:** Merseyside · Wirral · Chester · North Wales. View our [service area pages](/areas) for local information, or head back to the [homepage](/) or [contact page](/contact). Next step ## Get a free, fixed-price quote for flat roofing Free inspection, itemised written quote, 10-year insurance-backed guarantee on qualifying installs. No pressure, no call-out charge. [Request Your Quote](/contact) [0800 043 1108](tel:+448000431108) TrustMark · Fair Trades 9.5/10 · HomePro · £5M insured Free quote ## Tell us about your roof ## Get Your Free Fixed-Price Quote Free inspection, no obligation. Response within one working day. ![RTC Roofing Contractors Ltd](/__l5e/assets-v1/65b5a778-eabc-413b-a0c8-42887cc004ca/rtc-logo.webp) Family-run roofing contractors with over 20 years of experience. TrustMark, Fair Trades and HomePro accredited. Fully insured up to £5 million. Fixed-price quotes, insurance-backed guarantees. [@rtcroofingcontractorsltd](https://www.instagram.com/rtcroofingcontractorsltd/) ## Services - [Re-Roofing](/services/re-roofing) - [Roof Repairs](/services/roof-repairs) - [Flat Roofing](/services/flat-roofing) - [GRP Roofing](/services/grp-roofing) - [Lead Work](/services/lead-work) - [Slating](/services/slating) - [Tiling](/services/tiling) - [Guttering](/services/gutters) - [Emergency Repairs](/services/emergency) ## Areas - [Liverpool](/areas/liverpool) - [Wirral](/areas/wirral) - [Birkenhead](/areas/birkenhead) - [Heswall](/areas/heswall) - [Pensby](/areas/pensby) - [Irby](/areas/irby) - [Meols](/areas/meols) - [Moreton](/areas/moreton) - [Upton](/areas/upton) ## Contact [0800 043 1108 Main office · Mon–Sat 7am–6pm ](tel:+448000431108)[07727 254394 Emergency / out of hours ](tel:+447727254394)[07722 733343 Additional mobile line ](tel:+447722733343)[info@rtcroofing.co.uk ](mailto:info@rtcroofing.co.uk) Unit 4, Links Business Park Carr Lane Industrial Estate Carr Lane, Hoylake Wirral, CH47 4AX Opening Hours Mon–Sat 7am – 6pm · Sun Closed © 2026 RTC Roofing Contractors Ltd. Company No. 08376366. Registered in England & Wales. [Our Work](/our-work)[Privacy](/privacy-policy)[Terms](/terms-conditions) TrustMark · Fair Trades · HomePro · £5M Public & Employers' Liability (Covéa Insurance plc) RTC Roofing Contractors Ltd is an Introducer Appointed Representative of Ideal Sales Solutions Ltd, t/a Ideal4Finance. Ideal Sales Solutions Ltd is a credit broker and not a lender (FRN 703401). Finance available subject to status. The rate offered is always provisional and will depend upon your personal circumstances, the loan amount and the term. [Call Now](tel:+448000431108) [Free Quote](/contact)