{"title":"Celotex PL4000","description":"","products":[{"product_id":"375mm-celotex-pl4025-pir-insulated-plasterboard-2400mm-x-1200mm-375mm","title":"37.5mm Celotex PL4025 PIR Insulated Plasterboard 2.4m x 1.2m - 2.88m2 per board","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eCelotex is now Sopratherm. This board is also sold as Sopratherm, with the same code, the same UK manufacturing and the same declared thermal conductivity.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e37.5mm Celotex PL4025 is a two-in-one PIR insulated plasterboard, also known as a thermal laminate. It pairs a 25mm rigid polyisocyanurate (PIR) insulation core with a 12.5mm tapered edge plasterboard, bonded together to give an overall board thickness of 37.5mm. The PL4025 product code reflects this make-up, with the '25' denoting the 25mm PIR core (some buyers round the board up and call it 38mm insulated plasterboard, though the true thickness is 37.5mm). It is used to insulate and dry line internal walls and roof linings in a single operation, which is why it remains a common choice for upgrading the thermal performance of new build and refurbishment projects. Celotex is one of the most widely specified PIR brands in the UK, and PL4025 brings that insulation together with a ready-to-finish plasterboard face.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eEach board measures 2400mm x 1200mm, covers 2.88m² and is supplied individually. The paper-faced PIR core delivers a thermal conductivity (lambda) of 0.022 W\/mK, and the board carries an R-value (thermal resistance) of 1.20 m²K\/W, measured including the plasterboard. At around 9.99 kg\/m², the 37.5mm board is the slimmest and lightest in the PL4000 range, which makes it straightforward to handle and well suited to jobs where wall or ceiling depth is limited. Where a higher R-value is needed in the same build-up, the range steps up through 52.5mm, 62.5mm, 72.5mm and 77.5mm boards.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe plasterboard face has a tapered edge, so once the boards are butted together the joints can be taped with scrim and filled flush ready for decoration. Combining the insulation and the lining in one board removes a separate plasterboarding stage, cutting time on site and reducing the number of fixings and materials needed to reach a finished, insulated surface.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e37.5mm Celotex PL4025 is specified for internal wall dry lining on solid masonry and timber frame walls, and as a lining beneath pitched roof rafters and flat roof joists. On internal walls it is direct-bonded to masonry with dot and dab adhesive or mechanically fixed to battens, and in roof applications it is fixed beneath the rafters or joists to form an insulated, ready-to-finish ceiling or sloping soffit. As the slimmest board in the range it suits reveals, modest thermal upgrades and rooms where floor area and headroom are tight, across both domestic and non-domestic refurbishment and new build. Install it in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements, any ventilation or air gap the build-up calls for, and the limit on external wall use. Fitted correctly, the board helps limit the risk of surface condensation on the internal face and supports lasting energy savings.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eKey Benefits of Celotex PL4025:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTwo-in-one thermal laminate: a 25mm rigid polyisocyanurate (PIR) core bonded to 12.5mm tapered edge plasterboard, 37.5mm overall.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.022 W\/mK, delivering strong thermal performance at the slimmest board depth in the range.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eR-value (thermal resistance) of 1.20 m²K\/W, measured including the plasterboard.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInsulates and dry lines in a single operation, cutting out a separate plasterboarding stage and reducing time and labour on site.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTapered edge plasterboard for taped, flush-filled joints and a ready-to-decorate finish.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFixes by mechanical fixing to battens or studwork, or by direct bonding (dot and dab) to masonry.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe slimmest and lightest board in the PL4000 range, suited to window and door reveals and rooms where space is at a premium.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass B-s1, d0 reaction-to-fire classification to BS EN 13501-1.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBRE Green Guide A+ rating, which can support BREEAM credits.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), and is CFC\/HCFC free.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBBA certified (Certificate 16\/5357) for plasterboard thermal laminate applications, across new build and refurbishment.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSupplied as a single 2400mm x 1200mm board covering 2.88m².\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOverall thickness of 37.5mm is made up of a 25mm rigid PIR core plus a 12.5mm tapered edge plasterboard.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt the tapered edges tightly together, then tape the joints with scrim and fill flush before decorating.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFix mechanically to timber battens or studwork, or direct-bond to masonry with dot and dab adhesive.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe bonded plasterboard face provides both the internal finish and the board's Euroclass B-s1, d0 reaction-to-fire performance, so no separate fire-rated lining is needed over it.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFollow the latest Celotex guidance on vapour control for the application; some build-ups still need attention to interstitial condensation.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTake care lifting and fitting full boards: the bonded plasterboard adds weight over a bare PIR board, at around 9.99 kg\/m².\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCelotex PL4025 should not be used in the external walls of buildings over 11 metres in height; check current Building Regulations for your project.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore boards flat, off the ground, in their packaging and protected from the weather, keeping the plasterboard face dry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eAs the slimmest board in the PL4000 range, 37.5mm Celotex PL4025 brings a thermal upgrade and a finished plaster surface together in one slim 37.5mm board, keeping internal walls, reveals and roof linings simple where floor area and headroom are at a premium.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eIf space is not the constraint, you can reach the same R-values for less outlay: we also stock Tekwarm HP+ Insulated Plasterboard, which balances energy efficiency against budget, alongside Tekwarm PIR Insulated Plasterboard as a like-for-like laminate alternative to Celotex PL4000. You can download the full Celotex PL4025 datasheet for the complete specification and installation detail.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e Please be aware that during periods of high demand, we reserve the right to provide alternative brands that meet the same specifications and quality standards as the products you originally ordered.\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"Default Title","offer_id":52655563276622,"sku":"IUK00925","price":39.57,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/celotex-celotex-pir-insulated-plasterboard-2400mm-x-1200mm-37-5mm-iuk00925-1172607767.jpg?v=1749585852"},{"product_id":"525mm-celotex-pl4040-pir-insulated-plasterboard-2400mm-x-1200mm-525mm","title":"52.5mm Celotex PL4040 PIR Insulated Plasterboard 2.4m x 1.2m - 2.88m2 per board","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eCelotex is now Sopratherm. This board is also sold as Sopratherm, with the same code, the same UK manufacturing and the same declared thermal conductivity.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e52.5mm Celotex PL4040 is a thermal laminate, a board that combines insulation and plasterboard in a single sheet. It is built from a 40mm rigid polyisocyanurate (PIR) core bonded to a 12.5mm tapered edge plasterboard, giving an overall thickness of 52.5mm. In the PL4000 range the '40' in the PL4040 code refers to the 40mm PIR core, the layer doing the insulating work behind the plasterboard face. It is used to dry line and insulate internal walls and roof slopes in one operation, and the extra core depth over the entry board makes it a common pick for solid masonry wall upgrades and refurbishment work where a thermal target has to be met.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWith a thermal conductivity (lambda) of 0.022 W\/mK, the 40mm core gives the board an R-value (thermal resistance) of 1.85 m²K\/W, measured including the plasterboard, a useful step up from the entry 37.5mm board. Each sheet measures 2400mm x 1200mm, covers 2.88m² and is sold individually, weighing around 10.46 kg\/m². Sitting second in the PL4000 range, it keeps the internal build-up relatively slim while giving more thermal resistance than the 37.5mm board, with the 62.5mm, 72.5mm and 77.5mm boards available where a higher figure is needed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBecause the insulation and the lining come bonded as one board, a single fixing operation does the work of two stages, insulating and dry lining the wall or ceiling in one pass and removing a separate boarding stage. The plasterboard face is also the surface the installer finishes, so the wall is ready for jointing and skim once the boards are up.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e52.5mm Celotex PL4040 is specified for internal dry lining on solid masonry and timber frame walls, and beneath pitched roof rafters and flat roof joists as the inner lining layer. On masonry it is commonly direct-bonded with dot and dab adhesive or mechanically fixed to treated battens, and it suits both refurbishment and new build where an existing or planned wall needs to reach a thermal target. Install it to the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements, any ventilation the roof build-up calls for, and the limit on external wall use. Correctly detailed, it helps control the risk of surface condensation on the warm side of the wall and supports lasting reductions in heat loss. PIR insulated plasterboard of this type should not be used in the external walls of buildings over 11 metres in height.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eKey Benefits of Celotex PL4040:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal laminate built from a 40mm rigid polyisocyanurate (PIR) core bonded to 12.5mm tapered edge plasterboard, 52.5mm overall.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eR-value (thermal resistance) of 1.85 m²K\/W including the plasterboard, a step up from the 37.5mm board.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLow thermal conductivity of 0.022 W\/mK, so the added thermal resistance comes with only a modest increase in depth.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDry lines and insulates in one fixing operation, removing a separate plasterboarding stage.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDirect-bonds to masonry by dot and dab, or fixes mechanically to battens and studwork.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTapered edge plasterboard ready for taped, filled joints and a skim or paint finish.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA common choice for internal solid wall upgrades and refurbishment that has to meet a thermal target.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass B-s1, d0 reaction to fire to BS EN 13501-1.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBRE Green Guide A+ rating, which can support BREEAM credits.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBlowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), CFC\/HCFC free.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBBA certified (Certificate 16\/5357) for plasterboard thermal laminate applications.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2400mm x 1200mm board covering 2.88m², sold individually, at around 10.46 kg\/m².\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe 52.5mm overall thickness is a 40mm rigid PIR core plus a 12.5mm tapered edge plasterboard.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOn solid masonry the board is usually dot-and-dabbed or fixed to battens; follow Celotex guidance on the right method and any membrane or batten detail for the wall.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt the tapered edges together, then scrim-tape and fill the joints before skimming or decorating.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe bonded plasterboard face is the finished internal surface and carries the board's Euroclass B-s1, d0 reaction-to-fire performance.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAllow for the weight when handling: at around 10.46 kg\/m² a full board is heavier than the 37.5mm board, so it is a two-person lift in most cases.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCheck vapour control for the specific build-up and refer to current Celotex guidance on managing interstitial condensation.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCelotex PL4040 should not be used in the external walls of buildings over 11 metres in height; confirm against current Building Regulations.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore boards flat, off the ground and under cover, keeping the plasterboard face dry before fixing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eAs the first real step up in the PL4000 range, 52.5mm Celotex PL4040 puts a stronger single-board thermal resistance behind a finished plaster face, which is what makes it a steady choice for internal and solid wall upgrades that have a U-value to hit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eIf depth is not a concern on your build, you can reach comparable R-values for less outlay: we also stock Tekwarm HP+ Insulated Plasterboard, which trades a thicker build-up for a lower price, alongside Tekwarm PIR Insulated Plasterboard as a like-for-like laminate alternative to Celotex PL4000. The full Celotex PL4040 datasheet is available to download for the complete specification and installation detail.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e Please be aware that during periods of high demand, we reserve the right to provide alternative brands that meet the same specifications and quality standards as the products you originally ordered.\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"Default Title","offer_id":52655564489038,"sku":"IUK00926","price":49.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/celotex-celotex-pir-insulated-plasterboard-2400mm-x-1200mm-52-5mm-iuk00926-1172607765.jpg?v=1749585846"},{"product_id":"625mm-celotex-pl4050-pir-insulated-plasterboard-2400mm-x-1200mm-625mm","title":"62.5mm Celotex PL4050 PIR Insulated Plasterboard 2.4m x 1.2m - 2.88m2 per board","description":"\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e\u003cem\u003eCelotex is now Sopratherm. This board is also sold as Sopratherm, with the same code, the same UK manufacturing and the same declared thermal conductivity.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e62.5mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex PL4050 is a thermal laminate \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einsulated plasterboard that combines a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e50mm rigid polyisocyanurate (PIR) \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einsulation core with a 12.5mm tapered \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eedge plasterboard, for an overall board \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethickness of 62.5mm. The '50' in the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ePL4050 code marks the 50mm PIR core, a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eround, commonly specified insulation \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edepth that does the thermal work behind \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe plasterboard face. It insulates and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edry lines in one board, and the deeper \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ecore makes it a frequent choice for \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003epitched roof slopes, room-in-roof and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eloft ceiling linings, as well as \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einternal wall upgrades that call for \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003emore resistance than the thinner boards \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eprovide.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eThe 50mm core carries a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethermal conductivity (lambda) of 0.022 \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eW\/mK, giving the board an R-value \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e(thermal resistance) of 2.30 m²K\/W \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eincluding the plasterboard, higher \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eagain than the 52.5mm board below it in \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe range. Each sheet measures 2400mm x \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e1200mm, covers 2.88m² and is sold \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eindividually, at around 10.96 kg\/m². It \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003esits in the middle-to-upper part of the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ePL4000 range, with the 72.5mm and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e77.5mm boards available where a project \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eneeds the strongest single-board \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efigures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eWith the insulation and the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003elining bonded as one board, a single \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efixing run insulates the slope or wall \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eand provides the finished surface, \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003erather than building up a separate \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einsulation layer and then boarding over \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eit. The 50mm core delivers its \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eresistance in a board that still fits a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003esensible depth beneath rafters or \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eagainst a wall, which is part of why \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethis thickness is reached for so often \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eon roof and ceiling work.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e62.5mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex PL4050 is fixed beneath pitched \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eroof rafters and flat roof joists as \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe inner insulated lining, and used to \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edry line internal masonry and timber \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eframe walls. On walls it is \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edirect-bonded with dot and dab adhesive \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eor mechanically fixed to battens; in \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eroof and ceiling work it is fixed to \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe underside of the timbers to form an \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einsulated, ready-to-finish soffit or \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eceiling. Install it to the latest \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex technical guidance, the project \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003especification and current Building \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eRegulations, including fire \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003erequirements and any ventilation gap \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe roof build-up needs above the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einsulation. Detailed correctly, it \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ehelps limit the risk of surface \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003econdensation on the warm side and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003esupports a lasting cut in heat loss. As \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ewith the rest of the range, it should \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003enot be used in the external walls of \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ebuildings over 11 metres in height.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eKey Benefits of Celotex PL4050:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eThermal laminate pairing a 50mm rigid \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003epolyisocyanurate (PIR) core with 12.5mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003etapered edge plasterboard, 62.5mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eoverall.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eR-value (thermal resistance) \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eof 2.30 m²K\/W including the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eplasterboard, a step up from the 52.5mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eboard.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eThermal conductivity of 0.022 \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eW\/mK, delivering that resistance from a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e50mm core depth.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eA common choice for \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003epitched roof slopes, room-in-roof and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eloft ceiling linings, as well as wall \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eupgrades.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eInsulates and dry lines in \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eone fixing operation, saving a separate \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eboarding stage.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eDirect-bonds to \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003emasonry by dot and dab, or fixes \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003emechanically to battens, studwork and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003erafters.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eTapered edge plasterboard \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eready for taped, filled joints and a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eskim or paint finish.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eEuroclass B-s1, \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ed0 reaction to fire to BS EN 13501-1.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eBRE Green Guide A+ rating, which can \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003esupport BREEAM credits.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eBlowing agent \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ewith zero Ozone Depletion Potential \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e(ODP) and low Global Warming Potential \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e(GWP), CFC\/HCFC free.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eBBA certified \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e(Certificate 16\/5357) for plasterboard \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethermal laminate applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003e2400mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ex 1200mm board covering 2.88m², sold \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eindividually, at around 10.96 kg\/m².\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eGood to know:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eThe 62.5mm overall \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethickness is a 50mm rigid PIR core plus \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ea 12.5mm tapered edge plasterboard.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eIn roof and ceiling work the board is \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efixed to the underside of rafters or \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ejoists; leave any ventilation gap the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ebuild-up requires above the insulation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eOn masonry walls it is dot-and-dabbed \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eor fixed to battens; follow Celotex \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eguidance on the method and any membrane \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edetail.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eButt the tapered edges \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003etogether, then scrim-tape and fill the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ejoints before skimming or decorating.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eThe bonded plasterboard face is the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efinished surface and provides the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eboard's Euroclass B-s1, d0 \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ereaction-to-fire performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eA full \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eboard weighs around 31.6 kg (about \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e10.96 kg\/m²), so treat overhead fixing \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eto ceilings and slopes as a two-person \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ejob and support the boards while \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efixing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eCheck vapour control for the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003especific build-up and follow current \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex guidance on interstitial \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003econdensation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex PL4050 should \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003enot be used in the external walls of \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ebuildings over 11 metres in height; \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003econfirm against current Building \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eRegulations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cspan class=\"_animating_6ta1u_10\"\u003eStore boards flat, off \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe ground and under cover, keeping the \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eplasterboard face dry.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCarrying a 50mm \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ecore in a single fix-and-finish board, \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003e62.5mm Celotex PL4050 is the thickness \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003emany installers settle on for roof \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eslopes, loft ceilings and walls that \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eneed a firmer thermal upgrade without a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eseparate insulation layer to build up \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003efirst.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eWhere the extra depth is no \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eproblem and budget leads, you can reach \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003esimilar R-values for less: we also \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003estock Tekwarm HP+ Insulated \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ePlasterboard, which trades a deeper \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ebuild-up for a lower price, alongside \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eTekwarm PIR Insulated Plasterboard as a \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003elike-for-like laminate alternative to \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eCelotex PL4000. The full Celotex PL4050 \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003edatasheet is available to download for \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe complete specification and \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003einstallation detail.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"_chunkWrapper_6ta1u_30\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eImportant Notice: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ePlease be aware that during periods of \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ehigh demand, we reserve the right to \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eprovide alternative brands that meet \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003ethe same specifications and quality \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003estandards as the products you \u003c\/span\u003e\u003cspan class=\"_animating_6ta1u_10\"\u003eoriginally ordered.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Celotex","offers":[{"title":"Default Title","offer_id":52655564652878,"sku":"IUK00927","price":53.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/celotex-celotex-pir-insulated-plasterboard-2400mm-x-1200mm-62-5mm-iuk00927-1172607763.jpg?v=1749585841"},{"product_id":"725mm-celotex-pl4060-pir-insulated-plasterboard-2400mm-x-1200mm-725mm","title":"72.5mm Celotex PL4060 PIR Insulated Plasterboard 2.4m x 1.2m - 2.88m2 per board","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eCelotex is now Sopratherm. This board is also sold as Sopratherm, with the same code, the same UK manufacturing and the same declared thermal conductivity.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e72.5mm Celotex PL4060 is a thermal laminate insulated plasterboard that bonds a 60mm rigid polyisocyanurate (PIR) insulation core to a 12.5mm tapered edge plasterboard, giving an overall thickness of 72.5mm. The '60' in the PL4060 code is the 60mm PIR core, one of the deepest in the laminate range, with only the 77.5mm board carrying more. It insulates and dry lines in one board, which makes it a frequent specification for retrofitting older and solid-walled buildings that lose a lot of heat through the wall and need a larger improvement than the mid-range boards can give.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe 60mm core gives a thermal conductivity (lambda) of 0.022 W\/mK and an R-value (thermal resistance) of 2.75 m²K\/W including the plasterboard, the second-highest single-board figure in the PL4000 range. Each sheet is 2400mm x 1200mm, covers 2.88m² and is sold individually, weighing around 11.31 kg\/m². Only the 77.5mm board sits above it, so for most internal upgrades short of the maximum, this is the board that delivers the larger share of the thermal gain in one fix.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBonding the insulation and the lining into one board lets a single dry-lining operation lift a cold wall's performance and leave a finished surface, instead of fixing insulation and then boarding over it. Because the core is deep, the board does add to the internal face, so it pays to set out reveals, window boards, skirtings and socket positions for the extra thickness before fixing begins.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e72.5mm Celotex PL4060 is used to dry line internal solid masonry and timber frame walls, and beneath pitched roof rafters and flat roof joists as the inner lining. On solid walls it is commonly fixed to treated battens or direct-bonded by dot and dab where the background is sound, dry and free of damp. Install it to the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements, vapour control and any ventilation the roof build-up needs. Detailed correctly on an older wall, it helps control the risk of surface condensation now that the masonry sits colder behind the insulation, and supports a marked reduction in heat loss. As across the range, it should not be used in the external walls of buildings over 11 metres in height.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eKey Benefits of Celotex PL4060:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal laminate bonding a 60mm rigid polyisocyanurate (PIR) core to 12.5mm tapered edge plasterboard, 72.5mm overall.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eR-value (thermal resistance) of 2.75 m²K\/W including the plasterboard, the second-highest in the PL4000 range.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.022 W\/mK, giving a large single-board thermal gain for retrofit work.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSpecified for upgrading older and solid-walled properties that lose significant heat through the wall.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInsulates and dry lines in one operation, avoiding a separate insulation-then-board sequence.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFixes to battens or studwork mechanically, or direct-bonds to sound, dry masonry by dot and dab.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTapered edge plasterboard ready for taped, filled joints and a skim or paint finish.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass B-s1, d0 reaction to fire to BS EN 13501-1.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBRE Green Guide A+ rating, which can support BREEAM credits.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBlowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), CFC\/HCFC free.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBBA certified (Certificate 16\/5357) for plasterboard thermal laminate applications.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2400mm x 1200mm board covering 2.88m², sold individually, at around 11.31 kg\/m².\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe 72.5mm overall thickness is a 60mm rigid PIR core plus a 12.5mm tapered edge plasterboard.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThis is one of the thickest laminate boards, so set out reveals, window boards, skirtings and socket and switch positions for the added depth before fixing.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOn solid walls it is usually fixed to treated battens or dot-and-dabbed to a sound, dry background; follow Celotex guidance on the method and any membrane detail.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt the tapered edges together, then scrim-tape and fill the joints before skimming or decorating.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe bonded plasterboard face is the finished surface and carries the board's Euroclass B-s1, d0 reaction-to-fire performance.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA full board weighs around 32.6 kg (about 11.31 kg\/m²), heavier than the thinner boards, so handle it as a two-person lift.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOn retrofit of older walls, give vapour control proper attention: the masonry sits colder behind the insulation, so follow current Celotex guidance on interstitial condensation.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCelotex PL4060 should not be used in the external walls of buildings over 11 metres in height; confirm against current Building Regulations.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore boards flat, off the ground and under cover, keeping the plasterboard face dry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWith a 60mm core behind a single finished board, 72.5mm Celotex PL4060 is the thickness reached for when a solid or older wall needs a real step change in performance, short only of the range-topping 77.5mm board.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWhere build-up depth is not the deciding factor and budget is, you can reach similar R-values for less: we also stock Tekwarm HP+ Insulated Plasterboard, which trades a deeper build-up for a lower price, alongside Tekwarm PIR Insulated Plasterboard as a like-for-like laminate alternative to Celotex PL4000. The full Celotex PL4060 datasheet is available to download for the complete specification and installation detail.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e Please be aware that during periods of high demand, we reserve the right to provide alternative brands that meet the same specifications and quality standards as the products you originally ordered.\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"Default Title","offer_id":52655564783950,"sku":"IUK00928","price":62.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/celotex-celotex-pir-insulated-plasterboard-2400mm-x-1200mm-72-5mm-iuk00928-1172607761.jpg?v=1749585735"}],"url":"https:\/\/www.insulationuk.co.uk\/collections\/celotex-pl4000.oembed","provider":"Insulation UK","version":"1.0","type":"link"}