{"product_id":"1-2mm-epdm-rubber-roofing-membrane","title":"1.2mm EPDM Rubber Roofing Membrane – BBA Certified, Cut to Size","description":"\u003cdiv style=\"color:#1F2933;line-height:1.7\"\u003e\n\u003cp style=\"font-size:17px;margin:0 0 18px\"\u003eThe standard-thickness EPDM rubber roofing membrane, cut to your exact size and supplied as one continuous sheet — no seams, no joining on the roof, and nothing rounded up to a full roll. It is bonded cold with adhesive, so there is no torch and no naked flame anywhere in the job. Twenty widths from 0.53m to 15.24m, and any length up to 30.5m.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin:0 0 26px\"\u003e\n\u003cspan style=\"border:1px solid #DDE2E8;border-radius:6px;padding:8px 14px;font-size:14px\"\u003e\u003cstrong\u003e1.2mm\u003c\/strong\u003e · the standard thickness\u003c\/span\u003e\n\u003cspan style=\"border:1px solid #DDE2E8;border-radius:6px;padding:8px 14px;font-size:14px\"\u003e\u003cstrong\u003eBBA certified\u003c\/strong\u003e · cert. 19\/5670\u003c\/span\u003e\n\u003cspan style=\"border:1px solid #DDE2E8;border-radius:6px;padding:8px 14px;font-size:14px\"\u003e\u003cstrong\u003eUp to 50 years\u003c\/strong\u003e life expectancy\u003c\/span\u003e\n\u003cspan style=\"border:1px solid #DDE2E8;border-radius:6px;padding:8px 14px;font-size:14px\"\u003e\u003cstrong\u003eFree UK delivery\u003c\/strong\u003e · no cutting charge\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eHow the pricing works\u003c\/h2\u003e\n\u003cp\u003ePick a width, then set the quantity to the number of metres of length you need. \u003cstrong\u003eEvery width works out at exactly the same rate per square metre\u003c\/strong\u003e — a 0.53m offcut and a 15.24m sheet cost the same per m². There is no cutting charge, no minimum order and no surcharge for awkward dimensions, and the price you see already includes VAT.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/epdm-membrane-pricing-explained.jpg?v=1786098044\" alt=\"Diagram explaining how cut-to-size EPDM membrane pricing works: pick a width, set the length in metres, price is width times length times the per square metre rate\" width=\"1264\" height=\"848\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;max-width:900px;margin:18px auto;border-radius:8px\"\u003e\n\u003cp style=\"font-size:15px;color:#6B7684\"\u003eWorked example: a 4.04m wide sheet at 6 metres long is 24.24 m². Multiply that by the per-m² rate and you have the delivered price — that is the whole calculation.\u003c\/p\u003e\n\n\u003ch2\u003eWhat size should you order?\u003c\/h2\u003e\n\u003cp\u003eMeasure the roof deck, then \u003cstrong\u003eadd 150mm to each of the four sides\u003c\/strong\u003e so the rubber can dress down over every edge. Take the next width up from the list, and round the length up to whole metres.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/epdm-membrane-measuring-guide.jpg?v=1786098045\" alt=\"Diagram showing how to measure a flat roof deck and add 150mm on every side before ordering EPDM membrane cut to size\" width=\"1264\" height=\"848\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;max-width:900px;margin:18px auto;border-radius:8px\"\u003e\n\u003cp\u003eWhere the roof has an upstand, a kerb or a wall, add more than 150mm on that side — the membrane has to climb it as well as turn the edge. If you are between two widths, always take the larger: surplus trims off in seconds with a knife, but a sheet 50mm short cannot be rescued.\u003c\/p\u003e\n\u003cp style=\"margin:18px 0\"\u003e\u003ca href=\"\/pages\/epdm-roof-kit-calculator\" style=\"display:inline-block;background:#E8590C;color:#ffffff;padding:13px 22px;border-radius:8px;font-weight:700;text-decoration:none\"\u003eWork out my size and price\u003c\/a\u003e \u003cspan style=\"font-size:14px;color:#6B7684;margin-left:8px\"\u003eHandles L-shaped and pitched roofs, skylight voids and every adhesive and trim quantity.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhich thickness do you need?\u003c\/h2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/epdm-membrane-thickness-chooser.jpg?v=1786098044\" alt=\"Comparison of 1.0mm, 1.2mm and 1.5mm EPDM membrane thicknesses and what each is suited to\" width=\"1264\" height=\"848\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;max-width:900px;margin:18px auto;border-radius:8px\"\u003e\n\u003cp\u003e\u003cstrong\u003e1.2mm is the right answer for most roofs\u003c\/strong\u003e — extensions, garages, garden rooms, dormers and porches. Step down to \u003ca href=\"\/products\/1-0mm-epdm-rubber-roofing-membrane-durable-one-piece-flat-roof-waterproofing-sheet\"\u003e1.0mm\u003c\/a\u003e for sheds and small outbuildings nobody walks on, or up to \u003ca href=\"\/products\/1-5mm-heavy-duty-epdm-rubber-roofing-membrane-premium-flat-roof-waterproof-covering-for-extensions-garages-commercial-roofs\"\u003e1.5mm\u003c\/a\u003e for commercial spans and roofs that take foot traffic. Being honest about it: extra thickness buys resistance to damage, not extra waterproofing — how the sheet is bonded and detailed is what keeps water out. The \u003ca href=\"\/pages\/epdm-thickness-guide\"\u003ethickness guide\u003c\/a\u003e goes into the detail.\u003c\/p\u003e\n\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 10px\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600;width:38%\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eEPDM (ethylene propylene diene monomer) synthetic rubber, single ply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003e1.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eColour\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eSlate grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eWidths available\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003e20 widths: 0.53, 1.03, 1.53, 2.03, 2.53, 3.05, 3.66, 4.04, 4.57, 5.08, 5.55, 6.10, 6.55, 7.07, 7.62, 8.05, 8.55, 9.15, 12.20 and 15.24m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eMaximum single sheet\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003e15.24m wide × 30.5m long — supplied in one piece, no site joining\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003ePrice basis\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003ePer square metre, identical rate across every width. VAT included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eBBA certified, certificate no. 19\/5670. Fire performance tested to BS 476 and EN 13501. Certificates on request.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eLife expectancy\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eUp to 50 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eTemperature range\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eRemains flexible from −40°C to +120°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eStanding water\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eUnaffected by ponding water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eUV and ozone\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eStable — will not crack, peel, split or need re-coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eSuitable decks\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eOSB3, WBP plywood and other sound timber decking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #E6EAEF\"\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eRecommended fall\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eFlat and low-pitch roofs; minimum fall of 1:80 recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;font-weight:600\"\u003eFixing method\u003c\/td\u003e\n\u003ctd style=\"padding:10px\"\u003eFully bonded, cold applied — no heat or naked flame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat else you will need\u003c\/h2\u003e\n\u003cp\u003eMembrane on its own does not make a roof. For a typical fully bonded job you also need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/epdm-water-based-deck-adhesive-high-strength-bonding-glue-for-rubber-roofing-membranes\"\u003eWater-based deck adhesive\u003c\/a\u003e for the field of the roof, and \u003ca href=\"\/products\/epdm-rubber-roofing-contact-adhesive-high-strength-bonding-glue-for-timber-insulation-boards\"\u003econtact adhesive\u003c\/a\u003e for the perimeter and any upstands — the \u003ca href=\"\/pages\/epdm-adhesives-primers-guide\"\u003eadhesives guide\u003c\/a\u003e explains which goes where and how far a tin goes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/epdm-drip-gutter-edge-trim-2m-rubber-roof-uk\"\u003eDrip trim\u003c\/a\u003e for the gutter edge and \u003ca href=\"\/products\/epdm-kerb-edge-trim-2m-rubber-roof-uk\"\u003ekerb trim\u003c\/a\u003e elsewhere, with a moulded corner at every turn — see \u003ca href=\"\/collections\/flashing-and-trims\"\u003eall trims\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/epdm-lap-sealant-rubber-roof-uk\"\u003eLap sealant\u003c\/a\u003e for finishing bonded edges\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/epdm-membrane-seam-tape-75mm-rubber-roof-uk\"\u003eSeam tape\u003c\/a\u003e and \u003ca href=\"\/products\/epdm-rubber-roof-primer-high-strength-bonding-primer-for-flashings-detail-work\"\u003eprimer\u003c\/a\u003e only if the roof is bigger than a single sheet or you are joining to existing membrane\u003c\/li\u003e\n\u003cli\u003eAn \u003ca href=\"\/products\/epdm-pipe-flashing-boot-rubber-roof-uk\"\u003eEPDM pipe boot\u003c\/a\u003e for any flue, soil pipe or cable that passes through\u003c\/li\u003e\n\u003cli\u003eA \u003ca href=\"\/products\/epdm-diy-installation-kit-rubber-roof-uk\"\u003eDIY installation kit\u003c\/a\u003e if you do not already own a seam roller, scissors and brush\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:15px;color:#6B7684\"\u003eSend us your dimensions and we will list exactly what you need and what it comes to — we would far rather answer a question before you order than process a return afterwards.\u003c\/p\u003e\n\n\u003cdiv style=\"border:2px solid #E8590C;border-radius:12px;background:#FDF4EC;padding:22px 24px;margin:26px 0\"\u003e\n\u003ch3 style=\"margin-top:0\"\u003eFree downloads — no email address needed\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 16px\"\u003eOur own installation manual and a one-page checklist for the roof.\u003c\/p\u003e\n\u003cp style=\"margin:0\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/rubber-roof-uk-epdm-installation-manual.pdf?v=1786057613\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#E8590C;color:#ffffff;padding:12px 20px;border-radius:8px;font-weight:700;text-decoration:none;margin:0 10px 10px 0\"\u003eInstallation Manual (PDF)\u003c\/a\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/rubber-roof-uk-install-day-checklist.pdf?v=1786057613\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#1F2933;color:#ffffff;padding:12px 20px;border-radius:8px;font-weight:700;text-decoration:none;margin:0 0 10px 0\"\u003eInstall-Day Checklist (PDF)\u003c\/a\u003e\n\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eDelivery, dispatch and returns\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree delivery\u003c\/strong\u003e to UK mainland addresses on every order, whatever the size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame-day dispatch\u003c\/strong\u003e on orders placed before 2pm on a working day.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1–3 working days\u003c\/strong\u003e on a tracked courier once dispatched.\u003c\/li\u003e\n\u003cli\u003eMembrane is \u003cstrong\u003ecut to order\u003c\/strong\u003e, so once it has been cut it cannot be returned. Unopened, uncut stock items can be returned within 30 days.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow is the membrane priced?\u003c\/h3\u003e\n\u003cp\u003eBy the square metre, at the same rate for every width. Choose your width, set the quantity to the number of metres of length, and the price shown is what you pay — VAT included, delivery free, no cutting charge.\u003c\/p\u003e\n\u003ch3\u003eWhat size should I order?\u003c\/h3\u003e\n\u003cp\u003eYour deck size plus 150mm on each of the four sides. Take the next width up from the list and round the length to whole metres. A 3.5m × 5m deck needs roughly 3.8m × 5.3m, so order the 4.04m width at 6 metres.\u003c\/p\u003e\n\u003ch3\u003eDo I need to allow extra for upstands or a kerb?\u003c\/h3\u003e\n\u003cp\u003eYes. The 150mm allowance covers turning the edge on a simple roof. If the membrane has to climb an upstand, kerb or wall, add that height on top on that side.\u003c\/p\u003e\n\u003ch3\u003eWill there be a join or a seam?\u003c\/h3\u003e\n\u003cp\u003eNo. Every order is supplied as one continuous sheet at the size you specify, up to 15.24m wide and 30.5m long. There is nothing to tape and no seam that can fail later.\u003c\/p\u003e\n\u003ch3\u003eWhat is the biggest single sheet you can supply?\u003c\/h3\u003e\n\u003cp\u003e15.24m wide by 30.5m long. Very few domestic roofs come close, which is why almost every job is seamless.\u003c\/p\u003e\n\u003ch3\u003eWhat thickness do I need?\u003c\/h3\u003e\n\u003cp\u003e1.2mm suits most roofs — extensions, garages, garden rooms, dormers. Use 1.0mm for sheds and small outbuildings, and 1.5mm for commercial spans or roofs that get walked on.\u003c\/p\u003e\n\u003ch3\u003eDoes a thicker membrane make the roof more waterproof?\u003c\/h3\u003e\n\u003cp\u003eNo, and we would rather say so. All three thicknesses are the same rubber and equally waterproof. Thickness buys resistance to punctures and foot traffic. Leaks come from poor bonding and poor detailing, not from the sheet.\u003c\/p\u003e\n\u003ch3\u003eWhat colour is it?\u003c\/h3\u003e\n\u003cp\u003eSlate grey. It weathers to a slightly matt finish and does not fade to a different colour.\u003c\/p\u003e\n\u003ch3\u003eWhat else do I need to buy?\u003c\/h3\u003e\n\u003cp\u003eAt minimum: water-based deck adhesive for the field and contact adhesive for the perimeter and upstands. Most roofs also want edge trims with corners, and lap sealant to finish the bonded edges. Pipe boots, seam tape and primer are only needed if your roof has penetrations or a join.\u003c\/p\u003e\n\u003ch3\u003eWhich adhesive goes where?\u003c\/h3\u003e\n\u003cp\u003eWater-based deck adhesive bonds the big flat field — it is rollered on and the membrane laid into it wet. Contact adhesive bonds anything vertical or at an edge: it goes on both faces, is left until touch-dry, then grabs instantly. Never swap them.\u003c\/p\u003e\n\u003ch3\u003eHow much adhesive will I need?\u003c\/h3\u003e\n\u003cp\u003eAs a rough guide, a 5-litre tin of water-based deck adhesive covers around 20 m² of deck. Our calculator works out exact quantities including the perimeter contact adhesive, or ask us with your dimensions.\u003c\/p\u003e\n\u003ch3\u003eDo I need a primer?\u003c\/h3\u003e\n\u003cp\u003eNot for bonding to sound timber decking. Primer is for detail work — bonding tape, flashings or patches to the membrane surface.\u003c\/p\u003e\n\u003ch3\u003eCan I lay it over my existing felt roof?\u003c\/h3\u003e\n\u003cp\u003eSometimes, but stripping is better. Overlaying only works if the old felt is fully stuck down, flat, dry and free of mineral chippings. Stripping back to the deck lets you find and replace soft boards before you cover them for fifty years.\u003c\/p\u003e\n\u003ch3\u003eWhat can the membrane be bonded to?\u003c\/h3\u003e\n\u003cp\u003eSound timber decking — OSB3, WBP plywood or planed board. Concrete, metal and insulation boards are all possible but need different preparation, so ask us first.\u003c\/p\u003e\n\u003ch3\u003eDoes the roof need a fall?\u003c\/h3\u003e\n\u003cp\u003eA minimum of 1:80 towards the drainage edge is recommended, which is 25mm of drop for every 2m of run. EPDM tolerates standing water, but a roof that drains dries faster, stays cleaner and lasts longer.\u003c\/p\u003e\n\u003ch3\u003eDoes it cope with ponding water?\u003c\/h3\u003e\n\u003cp\u003eYes. EPDM is unaffected by standing water, unlike felt, which is why it suits older roofs where the falls are less than perfect.\u003c\/p\u003e\n\u003ch3\u003eIs it safe to walk on an EPDM roof?\u003c\/h3\u003e\n\u003cp\u003eFor occasional maintenance in soft-soled shoes, yes. It is not intended as a walking surface for regular traffic — add walkway pads if the roof will be used. Never walk on it wet or frosty; it becomes very slippery.\u003c\/p\u003e\n\u003ch3\u003eCan it be laid in cold or wet weather?\u003c\/h3\u003e\n\u003cp\u003eThe membrane itself is unaffected, but the adhesives are not. You need a dry deck, a dry day and 5°C or above, with no rain forecast until the adhesive has cured.\u003c\/p\u003e\n\u003ch3\u003eWhich side of the membrane goes up?\u003c\/h3\u003e\n\u003cp\u003eMembrane of this type is the same on both sides, so there is no wrong way up. Just keep the face that touches the deck clean and dust free.\u003c\/p\u003e\n\u003ch3\u003eHow do I join two pieces if my roof is bigger than one sheet?\u003c\/h3\u003e\n\u003cp\u003eOverlap the pieces by 75mm, prime both faces of the overlap and join them with seam tape, rolled hard from the centre outwards. Plan the seam across the fall and never through a detail. Our \u003ca href=\"\/pages\/how-to-install-epdm\"\u003einstallation guide\u003c\/a\u003e covers it step by step.\u003c\/p\u003e\n\u003ch3\u003eHow long does it last, and is it guaranteed?\u003c\/h3\u003e\n\u003cp\u003eA life expectancy of up to 50 years, with a manufacturer product guarantee. Felt on the same roof would typically need replacing five or more times over that period.\u003c\/p\u003e\n\u003ch3\u003eIs the membrane certified?\u003c\/h3\u003e\n\u003cp\u003eYes — BBA certified under certificate no. 19\/5670, and fire-tested to BS 476 and EN 13501. If your building control officer or insurer wants the paperwork, email us and we will send the certificates.\u003c\/p\u003e\n\u003ch3\u003eHow is it cut — will the edges be straight?\u003c\/h3\u003e\n\u003cp\u003eIt is cut square from the roll to your stated width and length before it is packed. Small variations of a few millimetres are normal on rubber, which is one more reason for the 150mm allowance.\u003c\/p\u003e\n\u003ch3\u003eCan you cut an L-shape or work from a template?\u003c\/h3\u003e\n\u003cp\u003eWe supply rectangles. For an L-shaped roof, order the smallest rectangle that encloses the whole shape and cut the notch on site — our \u003ca href=\"\/pages\/epdm-roof-kit-calculator\"\u003ecalculator\u003c\/a\u003e does that sizing for you and prices the trims for each edge.\u003c\/p\u003e\n\u003ch3\u003eCan I return it if I order the wrong size?\u003c\/h3\u003e\n\u003cp\u003eCut-to-size membrane cannot be returned once cut, which is exactly why we would rather check your measurements with you first. Send the dimensions and a photo before you order.\u003c\/p\u003e\n\u003ch3\u003eHow is it delivered and how long does it take?\u003c\/h3\u003e\n\u003cp\u003eRolled and wrapped on a tracked courier, free to UK mainland addresses. Order before 2pm on a working day and it is dispatched the same day, arriving in 1–3 working days.\u003c\/p\u003e\n\n\u003ch2\u003eGuides that go with this membrane\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/how-to-install-epdm\"\u003eHow to install EPDM roofing\u003c\/a\u003e — the full method, start to finish\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/epdm-thickness-guide\"\u003eThickness guide\u003c\/a\u003e — 1.0mm, 1.2mm and 1.5mm compared\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/epdm-adhesives-primers-guide\"\u003eAdhesives and primers guide\u003c\/a\u003e — coverage rates and flash-off times\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/how-to-fit-epdm-roof-trims\"\u003eFitting edge trims\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/epdm-learning-centre\"\u003eThe full EPDM Learning Centre\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How is EPDM membrane priced when cut to size?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"By the square metre, at the same rate for every width. Choose a width, set the quantity to the number of metres of length, and the price shown is what you pay: VAT included, delivery free, no cutting charge.\"}},{\"@type\":\"Question\",\"name\":\"What size EPDM membrane should I order?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Your deck size plus 150mm on each of the four sides. Take the next width up from the list and round the length to whole metres. A 3.5m by 5m deck needs about 3.8m by 5.3m, so order the 4.04m width at 6 metres.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to allow extra membrane for upstands or a kerb?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The 150mm allowance covers turning the edge on a simple roof. If the membrane must climb an upstand, kerb or wall, add that height on top on that side.\"}},{\"@type\":\"Question\",\"name\":\"Will the EPDM membrane have a join or seam?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Every order is supplied as one continuous sheet at the size specified, up to 15.24m wide and 30.5m long, so there is nothing to tape.\"}},{\"@type\":\"Question\",\"name\":\"What is the largest single sheet of EPDM available?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"15.24m wide by 30.5m long. Very few domestic roofs come close, so almost every job is seamless.\"}},{\"@type\":\"Question\",\"name\":\"What thickness of EPDM membrane do I need?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"1.2mm suits most roofs including extensions, garages, garden rooms and dormers. Use 1.0mm for sheds and small outbuildings, and 1.5mm for commercial spans or roofs that get walked on.\"}},{\"@type\":\"Question\",\"name\":\"Does thicker EPDM make a roof more waterproof?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. All thicknesses are the same rubber and equally waterproof. Thickness buys resistance to punctures and foot traffic. Leaks come from poor bonding and detailing, not from the sheet.\"}},{\"@type\":\"Question\",\"name\":\"What colour is 1.2mm EPDM membrane?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Slate grey. It weathers to a slightly matt finish and does not fade to a different colour.\"}},{\"@type\":\"Question\",\"name\":\"What else do I need to buy with EPDM membrane?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"At minimum water-based deck adhesive for the field and contact adhesive for the perimeter and upstands. Most roofs also want edge trims with corners and lap sealant. Pipe boots, seam tape and primer are only needed for penetrations or joins.\"}},{\"@type\":\"Question\",\"name\":\"Which EPDM adhesive goes where?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Water-based deck adhesive bonds the flat field and the membrane is laid into it wet. Contact adhesive bonds anything vertical or at an edge: applied to both faces, left until touch-dry, then it grabs instantly.\"}},{\"@type\":\"Question\",\"name\":\"How much adhesive will I need for an EPDM roof?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As a rough guide a 5-litre tin of water-based deck adhesive covers around 20 square metres of deck. Our calculator works out exact quantities including perimeter contact adhesive.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a primer to bond EPDM to a timber deck?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Primer is for detail work such as bonding tape, flashings or patches to the membrane surface, not for bonding to sound timber decking.\"}},{\"@type\":\"Question\",\"name\":\"Can EPDM be laid over an existing felt roof?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Sometimes, but stripping is better. Overlaying only works if the old felt is fully bonded, flat, dry and free of mineral chippings. Stripping lets you replace soft boards first.\"}},{\"@type\":\"Question\",\"name\":\"What surfaces can EPDM membrane be bonded to?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Sound timber decking such as OSB3, WBP plywood or planed board. Concrete, metal and insulation boards are possible but need different preparation.\"}},{\"@type\":\"Question\",\"name\":\"Does an EPDM roof need a fall?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A minimum of 1:80 towards the drainage edge is recommended, which is 25mm of drop per 2m of run. EPDM tolerates standing water but a roof that drains lasts longer.\"}},{\"@type\":\"Question\",\"name\":\"Does EPDM cope with ponding water?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, EPDM is unaffected by standing water, unlike felt, which is why it suits older roofs where the falls are imperfect.\"}},{\"@type\":\"Question\",\"name\":\"Is it safe to walk on an EPDM rubber roof?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For occasional maintenance in soft-soled shoes, yes. It is not a walking surface for regular traffic; add walkway pads if the roof will be used. Never walk on it wet or frosty.\"}},{\"@type\":\"Question\",\"name\":\"Can EPDM be laid in cold or wet weather?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The membrane is unaffected but the adhesives are not. You need a dry deck, a dry day and 5 degrees Celsius or above with no rain forecast until the adhesive cures.\"}},{\"@type\":\"Question\",\"name\":\"Which side of the EPDM membrane goes up?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Membrane of this type is the same on both sides, so there is no wrong way up. Keep the face that touches the deck clean and dust free.\"}},{\"@type\":\"Question\",\"name\":\"How do you join two pieces of EPDM membrane?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Overlap the pieces by 75mm, prime both faces of the overlap and join with seam tape rolled hard from the centre outwards. Plan the seam across the fall and never through a detail.\"}},{\"@type\":\"Question\",\"name\":\"How long does an EPDM rubber roof last?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A life expectancy of up to 50 years with a manufacturer product guarantee, against roughly 5 to 10 years for mineral felt.\"}},{\"@type\":\"Question\",\"name\":\"Is the EPDM membrane BBA certified?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, BBA certified under certificate number 19\/5670 and fire-tested to BS 476 and EN 13501. Certificates are available on request for building control or insurers.\"}},{\"@type\":\"Question\",\"name\":\"How accurately is cut-to-size EPDM cut?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is cut square from the roll to the stated width and length before packing. Small variations of a few millimetres are normal on rubber, which is another reason for the 150mm allowance.\"}},{\"@type\":\"Question\",\"name\":\"Can EPDM be cut to an L-shape or from a template?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"We supply rectangles. For an L-shaped roof, order the smallest rectangle that encloses the shape and cut the notch on site. Our calculator does that sizing and prices the trims per edge.\"}},{\"@type\":\"Question\",\"name\":\"Can I return cut-to-size EPDM membrane?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Cut-to-size membrane cannot be returned once cut, so we would rather check your measurements first. Send dimensions and a photo before ordering.\"}},{\"@type\":\"Question\",\"name\":\"How is EPDM membrane delivered and how long does it take?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Rolled and wrapped on a tracked courier, free to UK mainland addresses. Order before 2pm on a working day for same-day dispatch, arriving in 1 to 3 working days.\"}}]}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"HowTo\",\"name\":\"How to measure and order EPDM membrane cut to size\",\"description\":\"Working out the right width and length of EPDM rubber roofing membrane to order for a flat roof, including the 150mm edge allowance.\",\"totalTime\":\"PT15M\",\"tool\":[{\"@type\":\"HowToTool\",\"name\":\"Tape measure\"}],\"step\":[{\"@type\":\"HowToStep\",\"position\":1,\"name\":\"Measure the roof deck\",\"text\":\"Measure the length and width of the deck at its widest points. On a sloping roof measure along the slope rather than the plan.\"},{\"@type\":\"HowToStep\",\"position\":2,\"name\":\"Add 150mm to every side\",\"text\":\"Add 150mm to each of the four sides so the membrane can dress down over the edges. Add the full height of any upstand, kerb or wall on that side as well.\"},{\"@type\":\"HowToStep\",\"position\":3,\"name\":\"Take the next width up\",\"text\":\"Pick the next width up from the 20 stock widths. If you are between sizes always take the larger, because surplus trims off but a short sheet cannot be rescued.\"},{\"@type\":\"HowToStep\",\"position\":4,\"name\":\"Set the length in whole metres\",\"text\":\"Set the quantity to the number of metres of length required, rounded up to whole metres. The price is the area multiplied by the per square metre rate.\"}]}\n\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Rubber Roof UK","offers":[{"title":"0.53","offer_id":45207251353791,"sku":"RRUK-MEM12-W053","price":13.52,"currency_code":"GBP","in_stock":true},{"title":"1.03","offer_id":45207251386559,"sku":"RRUK-MEM12-W103","price":26.27,"currency_code":"GBP","in_stock":true},{"title":"1.53","offer_id":45207251419327,"sku":"RRUK-MEM12-W153","price":39.02,"currency_code":"GBP","in_stock":true},{"title":"2.03","offer_id":45207251452095,"sku":"RRUK-MEM12-W203","price":51.76,"currency_code":"GBP","in_stock":true},{"title":"2.53","offer_id":45207251484863,"sku":"RRUK-MEM12-W253","price":64.52,"currency_code":"GBP","in_stock":true},{"title":"3.05","offer_id":45207251517631,"sku":"RRUK-MEM12-W305","price":77.77,"currency_code":"GBP","in_stock":true},{"title":"3.66","offer_id":45207251550399,"sku":"RRUK-MEM12-W366","price":93.33,"currency_code":"GBP","in_stock":true},{"title":"4.04","offer_id":45207251583167,"sku":"RRUK-MEM12-W404","price":103.02,"currency_code":"GBP","in_stock":true},{"title":"4.57","offer_id":45207251615935,"sku":"RRUK-MEM12-W457","price":116.54,"currency_code":"GBP","in_stock":true},{"title":"5.08","offer_id":45207251648703,"sku":"RRUK-MEM12-W508","price":129.54,"currency_code":"GBP","in_stock":true},{"title":"5.55","offer_id":45207251681471,"sku":"RRUK-MEM12-W555","price":141.53,"currency_code":"GBP","in_stock":true},{"title":"6.10","offer_id":45207251714239,"sku":"RRUK-MEM12-W610","price":155.55,"currency_code":"GBP","in_stock":true},{"title":"6.55","offer_id":45207251747007,"sku":"RRUK-MEM12-W655","price":167.03,"currency_code":"GBP","in_stock":true},{"title":"7.07","offer_id":45207251779775,"sku":"RRUK-MEM12-W707","price":180.29,"currency_code":"GBP","in_stock":true},{"title":"7.62","offer_id":45207251812543,"sku":"RRUK-MEM12-W762","price":194.31,"currency_code":"GBP","in_stock":true},{"title":"8.05","offer_id":45207251845311,"sku":"RRUK-MEM12-W805","price":205.28,"currency_code":"GBP","in_stock":true},{"title":"8.55","offer_id":45207251878079,"sku":"RRUK-MEM12-W855","price":218.03,"currency_code":"GBP","in_stock":true},{"title":"9.15","offer_id":45207251910847,"sku":"RRUK-MEM12-W915","price":233.33,"currency_code":"GBP","in_stock":true},{"title":"12.20","offer_id":45323317018815,"sku":"RRUK-MEM12-W1220","price":311.1,"currency_code":"GBP","in_stock":true},{"title":"15.24","offer_id":45323317051583,"sku":"RRUK-MEM12-W1524","price":388.62,"currency_code":"GBP","in_stock":true},{"title":"Cut to size — per m²","offer_id":45949947576511,"sku":"RRUK-MEM12-M2","price":25.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/roofer-unrolling-1-2mm-epdm-rubber-membrane-flat-roof-garden-room.png?v=1779800552","url":"https:\/\/rubberroofuk.uk\/products\/1-2mm-epdm-rubber-roofing-membrane","provider":"Rubber Roof UK","version":"1.0","type":"link"}