{"title":"Insulation Boards","description":"","products":[{"product_id":"100mm-eps100-polystyrene-insulation-board-2400mm-x-1200mm","title":"100mm EPS100 Polystyrene Insulation Board 2400mm x 1200mm","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eEPS100 Polystyrene Insulation Board with a 2400mm length, 1200mm width, and 100mm thickness.\u003cbr\u003e\u003cbr\u003eManufactured from expanded polystyrene beads fused into a rigid, lightweight sheet, this board provides reliable compressive strength and dimensional stability across a broad range of construction applications.\u003cbr\u003e\u003cbr\u003eRated to EPS100 grade, it achieves a compressive strength of 100kPa, making it suitable for use beneath non-structural or lightly loaded floor systems, as well as in general insulation build-ups. While not classed as a load-bearing structural material, EPS100 maintains shape and support when used under screeds, slabs, or flooring layers subject to standard domestic or light commercial loads.\u003cbr\u003e\u003cbr\u003eDesigned for use in floors, walls, and roofs, it offers easy handling, precise cutting, and quick installation. The overall dimensions of 2400mm x 1200mm x 100mm offer maximum material depth for improved basic thermal resistance.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh compressive strength\u003c\/strong\u003e: EPS100 rating provides 100kPa resistance under compression, suitable for non-structural flooring and general insulation applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight composition\u003c\/strong\u003e: Easy to handle, cut, and fit with standard tools, reducing installation time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-application suitability\u003c\/strong\u003e: Compatible with floors, walls, and roofs in both new-build and retrofit projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard size 2400mm x 1200mm x 100mm\u003c\/strong\u003e: Provides maximum thickness within the EPS100 range for deeper void filling and standard-grade insulation performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFloor insulation\u003c\/strong\u003e: Suitable beneath screeds, ground-bearing slabs, or suspended floors where compressive stability is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall lining and cavity fill\u003c\/strong\u003e: Provides modest thermal resistance in internal linings or cavity walls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof insulation\u003c\/strong\u003e: Used in flat or pitched roof systems under membranes or deck coverings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerimeter insulation\u003c\/strong\u003e: Ensures continuity of insulation around slab edges or external walls.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface preparation\u003c\/strong\u003e: Ensure substrate is level, clean, and dry before laying boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard fixing\u003c\/strong\u003e: Lay boards tightly with staggered joints to prevent thermal bridging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdhesive or mechanical fixing\u003c\/strong\u003e: Use approved insulation adhesives or fixings suited to substrate and application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting\u003c\/strong\u003e: Trim boards with a fine-toothed saw or hot wire cutter for accurate fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection\u003c\/strong\u003e: Avoid prolonged UV exposure and protect from solvents or hydrocarbons.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial specification\u003c\/strong\u003e: Expanded polystyrene insulation conforming to BS EN 13163.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength\u003c\/strong\u003e: Minimum 100kPa at 10% compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity\u003c\/strong\u003e: Typical value 0.038 W\/m·K.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Always verify compatibility with adhesives and finishes to ensure material integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"EPS100 \/ 100mm","offer_id":53771585159279,"sku":"3001307","price":29.04,"currency_code":"GBP","in_stock":true},{"title":"EPS150 \/ 100mm","offer_id":53771585192047,"sku":"3001316","price":40.51,"currency_code":"GBP","in_stock":true},{"title":"EPS70 \/ 100mm","offer_id":53771585224815,"sku":"3001217","price":23.14,"currency_code":"GBP","in_stock":true},{"title":"EPS150 \/ 150mm","offer_id":53771585257583,"sku":"3001317","price":60.77,"currency_code":"GBP","in_stock":true},{"title":"EPS100 \/ 25mm","offer_id":53771585290351,"sku":"3001304","price":7.26,"currency_code":"GBP","in_stock":true},{"title":"EPS150 \/ 25mm","offer_id":53771585323119,"sku":"3001313","price":10.13,"currency_code":"GBP","in_stock":true},{"title":"EPS70 \/ 25mm","offer_id":53771585355887,"sku":"3001219","price":5.78,"currency_code":"GBP","in_stock":true},{"title":"EPS100 \/ 50mm","offer_id":53771585388655,"sku":"3001305","price":14.52,"currency_code":"GBP","in_stock":true},{"title":"EPS150 \/ 50mm","offer_id":53771585421423,"sku":"3001314","price":20.26,"currency_code":"GBP","in_stock":true},{"title":"EPS70 \/ 50mm","offer_id":53771585454191,"sku":"3001220","price":11.57,"currency_code":"GBP","in_stock":true},{"title":"EPS100 \/ 75mm","offer_id":53771585486959,"sku":"3001306","price":21.78,"currency_code":"GBP","in_stock":true},{"title":"EPS150 \/ 75mm","offer_id":53771585519727,"sku":"3001315","price":30.38,"currency_code":"GBP","in_stock":true},{"title":"EPS70 \/ 75mm","offer_id":53771585552495,"sku":"3001221","price":17.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/EPS100_Polystyrene_Insulation_Board_2400mm_x_1200mm_-_Photo_ae2c71ce-08d9-47da-bc99-a34078383f0c.jpg?v=1783758923"},{"product_id":"115mm-recticel-eurowall-full-fill-insulation-t-g-board-1200mm-x-450mm-4-32m2-pack","title":"115mm Recticel Eurowall+ Full Fill Insulation T\u0026G Board 1200mm x 450mm (4.32m2\/Pack)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eRecticel Eurowall+ Full Fill Insulation T\u0026amp;G Board measuring 115mm thick and 1200mm × 460mm in size.\u003cbr\u003e \u003cbr\u003eHigh-performance rigid polyisocyanurate (PIR) insulation board designed for full-fill masonry cavity wall applications. The board features a tongue and groove joint on all four sides to ensure precise interlocking, minimising thermal bridging and maintaining consistent insulation continuity across the wall cavity.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eEach board is faced with a multi-layer gas-diffusion-tight foil, reflective on one side and alkali-resistant on the other, optimising thermal efficiency and long-term durability within the cavity environment. The rigid PIR core delivers excellent thermal performance with a declared conductivity of 0.022 W\/mK, achieving strong U-value reductions in modern wall systems.\u003cbr\u003e\u003cbr\u003eThe 115mm thickness offers enhanced thermal performance for deeper cavity wall systems in energy-efficient construction.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh thermal performance:\u003c\/strong\u003e Low thermal conductivity of 0.022 W\/mK for energy-efficient cavity wall insulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterlocking edges:\u003c\/strong\u003e Tongue and groove joints on all four sides prevent thermal gaps and improve fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable facing:\u003c\/strong\u003e Gas-diffusion-tight foil facings provide moisture resistance and surface integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight handling:\u003c\/strong\u003e Rigid PIR core allows easy cutting, lifting, and installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture control:\u003c\/strong\u003e Alkali-resistant facing minimises water ingress and maintains thermal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 115mm board suitable for deeper cavity wall systems in energy-efficient construction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-fill cavity walls:\u003c\/strong\u003e Specifically designed for masonry cavity wall systems built to current regulatory U-values.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResidential buildings:\u003c\/strong\u003e Ideal for domestic housing where full-fill insulation is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial developments:\u003c\/strong\u003e Suitable for schools, offices, and mixed-use buildings with cavity wall construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy efficiency upgrades:\u003c\/strong\u003e Contributes to reduced heat loss and improved building energy ratings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Ensure wall cavities are clean, dry, and free from mortar droppings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard fitting:\u003c\/strong\u003e Insert boards with tongue and groove joints interlocked tightly and staggered in brick bond pattern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecuring:\u003c\/strong\u003e Retain boards with proprietary wall ties and retaining clips in accordance with Recticel guidance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJoint sealing:\u003c\/strong\u003e Ensure all edges are closely fitted to prevent air gaps or cold bridges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Keep boards dry on-site and covered until installed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial specification:\u003c\/strong\u003e Rigid PIR insulation with multi-layer foil facings, reflective on one side and alkali-resistant on the other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity:\u003c\/strong\u003e 0.022 W\/mK.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength:\u003c\/strong\u003e ≥120 kPa at 10% deformation to EN 826.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire performance:\u003c\/strong\u003e Euroclass F to EN 13501-1; BS 476 Part 7 Class 1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater vapour resistance:\u003c\/strong\u003e µ value between 50 and 100 (EN ISO 10456).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissivity:\u003c\/strong\u003e 0.05.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance:\u003c\/strong\u003e Manufactured to EN 13165:2012 + A2:2016 under ISO 9001 and ISO 14001 management systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e LABC registered (EWW620) and BBA certified (Certificate 02\/3908).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note:\u003c\/strong\u003e Installation must follow Recticel Eurowall+ guidance to maintain declared thermal and fire performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Recticel","offers":[{"title":"115mm","offer_id":53771585814639,"sku":"3002214","price":158.37,"currency_code":"GBP","in_stock":false},{"title":"140mm","offer_id":53771585847407,"sku":"3002215","price":168.64,"currency_code":"GBP","in_stock":false},{"title":"90mm","offer_id":53771585880175,"sku":"3002217","price":139.19,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/recticel_eurowall_angled_view.jpg?v=1783758926"},{"product_id":"100mm-kingspan-thermaroof-tr26-flat-roof-insulation-board-2400mm-x-1200mm","title":"100mm Kingspan Thermaroof TR26 Flat Roof Insulation Board 2400mm x 1200mm","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eKingspan Thermaroof TR26 Flat Roof Insulation Board measuring 2400mm x 1200mm with a 100mm thickness. This high-performance rigid thermoset insulation board is specifically designed for flat roofs waterproofed with mechanically fixed single-ply membranes. \u003cbr\u003e\u003cbr\u003eManufactured with a fibre-free insulation core and low emissivity composite foil facings, it achieves excellent thermal conductivity of 0.022 W\/m·K, delivering high levels of thermal efficiency. \u003cbr\u003e\u003cbr\u003eThe board is LPCB approved to LPS 1181 Part 1 and FM approved for Class 1 steel deck roof assemblies, confirming its suitability for demanding roof systems. \u003cbr\u003e\u003cbr\u003eResistant to water vapour transmission and fully compatible with most mechanically fixed single-ply and green roof systems, it provides long-term thermal reliability and structural stability. \u003cbr\u003e\u003cbr\u003eIts rigid board format allows straightforward installation and consistent performance across large roof areas, with a 100mm thickness ensuring optimal thermal resistance for warm roof applications.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh thermal efficiency\u003c\/strong\u003e: Achieves a low thermal conductivity of 0.022 W\/m·K for excellent insulation performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable rigid construction\u003c\/strong\u003e: Rigid thermoset core retains dimensional stability and compressive strength under mechanical fixing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture resistance\u003c\/strong\u003e: Closed-cell structure resists the passage of water vapour, protecting the roof system from condensation risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem compatibility\u003c\/strong\u003e: Fully compatible with most mechanically fixed single-ply membranes and green roof systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight handling\u003c\/strong\u003e: Easy to cut, position, and secure, supporting fast-track installation on site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental performance\u003c\/strong\u003e: Manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertified quality\u003c\/strong\u003e: LPCB approved to LPS 1181 Part 1 and FM approved for Class 1 steel deck roofs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSustainable sourcing\u003c\/strong\u003e: Certified to BES 6001 ‘Excellent’ for responsible sourcing, with a BRE Green Guide rating of A+.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize and format\u003c\/strong\u003e: Supplied as 2400mm x 1200mm boards with a 100mm thickness for enhanced thermal performance in flat roof assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat roof systems\u003c\/strong\u003e: Suitable for use beneath mechanically fixed single-ply waterproofing membranes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm roof construction\u003c\/strong\u003e: Ideal for roofs requiring continuous insulation over the deck and vapour control layer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen roofs\u003c\/strong\u003e: Compatible with extensive and intensive green roof systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew build and refurbishment\u003c\/strong\u003e: Designed for use in both new and existing flat roof applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial and commercial buildings\u003c\/strong\u003e: Suitable for steel and concrete deck installations requiring robust insulation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate preparation\u003c\/strong\u003e: Ensure deck is clean, dry, and structurally sound before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVapour control layer\u003c\/strong\u003e: Install a separate vapour control layer unless used directly on a sealed metal deck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixing method\u003c\/strong\u003e: Mechanically fix insulation boards through the vapour control layer or metal deck using approved fasteners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard layout\u003c\/strong\u003e: Lay boards tightly-butted with staggered joints to avoid thermal bridging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFalls and drainage\u003c\/strong\u003e: Construct falls within the roof deck or through a Kingspan Thermataper system to ensure adequate drainage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection and access\u003c\/strong\u003e: Restrict access to light foot traffic only; provide walkway protection where regular maintenance is required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity\u003c\/strong\u003e: 0.022 W\/m·K.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire performance\u003c\/strong\u003e: LPCB approved to LPS 1181 Part 1; FM approved for Class 1 steel deck assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental rating\u003c\/strong\u003e: BRE Green Guide rating of A+; manufactured under ISO 14001:2015 environmental management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResponsible sourcing\u003c\/strong\u003e: BES 6001 ‘Excellent’ certification for sustainable production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality assurance\u003c\/strong\u003e: Manufactured under ISO 9001:2015 quality and ISO 50001:2011 energy management systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance\u003c\/strong\u003e: Meets BS 4841-4 and BS EN ISO 6946 calculation methodologies for thermal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Always conduct a U-value and condensation risk analysis before installation; 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The fibre-free phenolic core achieves a low thermal conductivity of 0.018 W\/m·K, supporting strong energy retention in concrete slabs, screeded floors, and suspended timber systems.\u003cbr\u003e\u003cbr\u003eThe board is faced on both sides with a durable glass-tissue layer autohesively bonded to the core, providing a stable surface compatible with common floor build-ups. Its closed-cell structure resists air infiltration and water vapour passage, ensuring consistent long-term performance within the floor assembly.\u003cbr\u003e\u003cbr\u003eA minimum compressive strength of 120 kPa at 10% compression accommodates typical domestic and commercial floor loading when used beneath unreinforced screeds. Its lightweight construction helps reduce site disruption by limiting soil removal and simplifying service routes during floor preparation.\u003cbr\u003e\u003cbr\u003eHandling, cutting, and placement remain straightforward in both new-build and refurbishment settings, with the material offering a non-deleterious insulation option produced using a zero-ODP, low-GWP blowing agent.\u003cbr\u003e\u003cbr\u003eManufactured with a 100mm thickness, it provides a deep insulation option suited to floor constructions targeting high levels of thermal efficiency.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium phenolic insulation:\u003c\/strong\u003e Provides a rigid thermoset phenolic core for high thermal efficiency in ground-floor applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow thermal conductivity:\u003c\/strong\u003e Achieves 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responsible specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Lightweight and easy to cut for precise fitting in both new-build and refurbishment settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness specification:\u003c\/strong\u003e 100mm thickness suited to deep floor build-ups and installations requiring high thermal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete floors:\u003c\/strong\u003e Suitable for insulation beneath slabs and screeds in domestic and commercial buildings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuspended timber floors:\u003c\/strong\u003e Appropriate for improving thermal performance in timber-based floor constructions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefurbishment projects:\u003c\/strong\u003e Applicable across upgrade works requiring enhanced ground-floor thermal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerimeter detailing:\u003c\/strong\u003e Compatible with perimeter upstand insulation to reduce heat loss at wall-to-floor junctions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate preparation:\u003c\/strong\u003e Ensure the supporting base is clean, level, and protected by an effective damp proof membrane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard arrangement:\u003c\/strong\u003e Lay boards tightly with staggered joints to minimise thermal bridging across the floor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerimeter treatment:\u003c\/strong\u003e Install suitable upstand insulation to improve wall-to-floor junction performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad application:\u003c\/strong\u003e 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Lightweight yet structurally stable, the boards are easy to cut and position, enabling rapid installation with precise joint alignment and no loss of compressive or thermal performance. \u003cbr\u003e\u003cbr\u003eThe 100mm thickness is suited to demanding insulation environments requiring enhanced energy performance.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh compressive strength:\u003c\/strong\u003e Withstands 300kPa load, supporting use under heavy floors or roof ballast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed-cell structure:\u003c\/strong\u003e Prevents water ingress and maintains insulation properties in damp conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable thermal performance:\u003c\/strong\u003e Thermal conductivity typically 0.034 W\/m·K for consistent energy efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable and lightweight:\u003c\/strong\u003e Resists damage during handling and installation while remaining easy to cut and shape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture resistant:\u003c\/strong\u003e Retains dimensional stability and mechanical performance when exposed to wet conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSustainability performance:\u003c\/strong\u003e Produced with zero ozone depletion potential (ODP) and low global warming potential (GWP).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness suitability:\u003c\/strong\u003e 100mm board thickness provides enhanced thermal resistance and mechanical stability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround floors:\u003c\/strong\u003e Provides an insulation layer under screed or slab floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverted roofs:\u003c\/strong\u003e Suitable for thermal protection above waterproof membranes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundations and perimeters:\u003c\/strong\u003e Effective where compressive strength and moisture resistance are essential.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate preparation:\u003c\/strong\u003e Surfaces should be level, clean, and free from standing water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting:\u003c\/strong\u003e Score and snap or use a fine-toothed saw to achieve tight joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixing:\u003c\/strong\u003e Apply in staggered bond with adhesive or mechanical fixings appropriate to the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Shield from UV exposure and site traffic before covering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather conditions:\u003c\/strong\u003e Avoid open flame or solvent contact during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Store flat, under cover, and away from direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity:\u003c\/strong\u003e 0.034 W\/m·K.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength:\u003c\/strong\u003e 300kPa at 10% compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater absorption:\u003c\/strong\u003e ≤ 0.7% by volume.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing standard:\u003c\/strong\u003e EN 13164 for extruded polystyrene (XPS).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental profile:\u003c\/strong\u003e Zero ODP, low GWP.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note:\u003c\/strong\u003e Always install per Kingspan technical guidance. 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Manufactured with a low emissivity foil facing, it delivers exceptional thermal conductivity of 0.021 W\/mK, helping achieve low U-values while reducing overall wall thickness requirements.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eThe tongue and groove edge profile provides a tight, secure fit, minimising air gaps and thermal bridging. The board can be installed as a full fill solution or with a residual cavity of up to 10mm to accommodate mortar squeeze and simplify installation.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eLightweight, rigid, and easy to handle, the board fits standard wall tie spacing, supporting fast, efficient on-site fitting. 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seal edges as required by specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResidual cavity:\u003c\/strong\u003e Maintain up to 10mm air space where design requires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Keep boards dry and covered until fully installed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial specification:\u003c\/strong\u003e Rigid PIR insulation with low emissivity foil facing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity:\u003c\/strong\u003e 0.021 W\/m·K (to BS EN 13165).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire performance:\u003c\/strong\u003e Euroclass E reaction to fire to BS EN 13501-1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength:\u003c\/strong\u003e ≥120 kPa at 10% compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater vapour resistance:\u003c\/strong\u003e High resistance due to foil facing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e BBA certified (No. 16\/5343) for full fill cavity wall systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental compliance:\u003c\/strong\u003e Manufactured under ISO 14001:2015 Environmental Management System.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance:\u003c\/strong\u003e UKCA marked to BS EN 13165 for factory-made rigid polyurethane (PU) insulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note:\u003c\/strong\u003e Install and maintain in accordance with Celotex guidance and BBA certification details.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"115mm","offer_id":53771587977327,"sku":"3002376","price":154.05,"currency_code":"GBP","in_stock":false},{"title":"140mm","offer_id":53771588010095,"sku":"3002377","price":150.48,"currency_code":"GBP","in_stock":false},{"title":"90mm","offer_id":53771588042863,"sku":"3002375","price":130.78,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Celotex_Thermaclass_Cavity_Wall_21_-_Photo.jpg?v=1783758932"},{"product_id":"100mm-celotex-cavity-wall-insulation-board-1200mm-x-450mm-3-24m2-pack","title":"100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm (3.24m2\/Pack)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eCelotex CW4100 Cavity Wall Insulation Board measuring 100mm thick and 1200mm × 450mm in size.\u003cbr\u003e \u003cbr\u003eHigh-performance rigid polyisocyanurate (PIR) insulation board designed for use in masonry cavity wall constructions. The board provides excellent thermal performance while maintaining a lightweight, easy-to-handle format for quick installation.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eManufactured with a low-emissivity foil facing on both sides, it enhances the thermal resistance of air spaces within the cavity, contributing to improved overall wall U-values. 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floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid PIR core:\u003c\/strong\u003e Lightweight yet robust, easy to cut and install with standard tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture resistance:\u003c\/strong\u003e Closed-cell core prevents water uptake and preserves thermal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental credentials:\u003c\/strong\u003e Zero ODP, low GWP blowing agent, and BRE Green Guide Rating A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBBA certified (17\/5405, 16\/5352):\u003c\/strong\u003e Independent assurance of performance across roofs, walls, and floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard size 2400 × 1200mm:\u003c\/strong\u003e Supplied in the industry-standard sheet size for insulation, ensuring compatibility across typical build-ups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness 100mm:\u003c\/strong\u003e Popular and practical size for achieving strong thermal performance in standard build-ups.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral insulation:\u003c\/strong\u003e Versatile board suitable for a wide range of domestic and commercial applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeam and block flooring\u003c\/strong\u003e: Maximum efficiency 100mm PIR boards are installed over the structural floor to provide a continuous thermal barrier beneath sand and cement or liquid screeds. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete slab and oversite floors\u003c\/strong\u003e: High compressive strength enables boards to be laid directly over or under ground-bearing slabs to ensure the lowest possible U-values in new-build construction. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuspended timber floors\u003c\/strong\u003e: Rigid boards are cut-to-fit and friction-supported between floor joists to significantly reduce heat loss through ventilated sub-floor voids. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete slab overlays\u003c\/strong\u003e: Standard 100mm thickness allows for the upgrade of existing concrete floors to provide a thermal barrier equivalent to modern new-build specifications. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderfloor heating systems\u003c\/strong\u003e: Reflective foil facers on both sides of the board enhance the efficiency of underfloor heating by reflecting heat upwards into the living space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTimber frame wall insulation\u003c\/strong\u003e: Maximum efficiency 100mm PIR boards are friction-fitted between timber studs to ensure the highest possible thermal ratings in wall assemblies. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMasonry wall dry-lining\u003c\/strong\u003e: Flagship 100mm boards are fixed to the internal face of solid or cavity masonry walls to provide a thermal barrier equivalent to modern new-build specifications. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitched roof insulation\u003c\/strong\u003e: Full-thickness 100mm boards are installed between or over rafters to create a high-specification, regulation-compliant thermal envelope. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat roof insulation\u003c\/strong\u003e: High compressive strength allows for installation beneath a waterproof membrane or over a structural deck to provide the ultimate thermal solution for the roof covering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSummerhouse and garden room insulation\u003c\/strong\u003e: High-performance 0.022 W\/mK thermal conductivity provides maximum heat retention within timber stud walls and roof rafters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConservatory warm-roof conversions\u003c\/strong\u003e: Optimum 100mm thickness enables roof structures to meet or exceed Part L U-value requirements during solid-roof upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring and cutting\u003c\/strong\u003e: Measure the aperture accurately and cut the board using a fine-toothed saw or sharp knife for a tight friction fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositioning and fixing\u003c\/strong\u003e: Place the board securely against the substrate or between structural members, ensuring no gaps are left between adjacent boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing joints\u003c\/strong\u003e: Apply high-quality aluminium foil tape to all board joints to maintain the integrity of the vapour control layer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical attachment\u003c\/strong\u003e: Use appropriate insulation fixings or adhesive as specified by the project requirements to secure boards to walls or ceilings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire lining (wall applications)\u003c\/strong\u003e: Ensure the insulation used in wall applications is covered with a fire-rated lining, such as 12.5mm plasterboard, to meet safety requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal conductivity\u003c\/strong\u003e: Achieves a declared Lambda value of 0.022 W\/mK in accordance with BS EN 13165. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive strength\u003c\/strong\u003e: Rated at ≥140 kPa when tested to BS EN 826, making it suitable for floor applications subject to light loads. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK Building Regulations Part L\u003c\/strong\u003e: Helps meet Part L (Fuel and Power) requirements; however, 100mm may require additional layers to meet specific new-build U-value targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK Building Regulations Part B\u003c\/strong\u003e: Rated as Euroclass E in accordance with BS EN 13501-1; this material is combustible and must be installed behind a fire-rated lining in wall applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK Building Regulations Part C\u003c\/strong\u003e: Requires the use of a separate Vapour Control Layer (VCL) and taped joints in many applications to prevent interstitial condensation as per Part C (Site preparation and resistance to contaminants and moisture). \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental impact\u003c\/strong\u003e: Zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP) during the manufacturing process. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: UK Building Regulations vary by project and location; always consult a Building Control Officer or Architect to confirm this thickness meets the legal U-value requirements for your specific build.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eWhat Customers Are Saying\u003c\/h2\u003e\u003cp\u003eCustomers consistently praise the Celotex GA4100 for its ease of cutting and fitting, particularly in summerhouse, loft conversion and extension projects. Several reviewers highlight how cleanly the boards slot between studs and rafters with minimal waste. Delivery speed and condition on arrival are frequently mentioned, with buyers noting boards arrived undamaged and on schedule. Trade professionals and DIYers alike rate the thermal performance highly, with multiple customers reporting noticeable improvements in room temperature. The competitive pricing compared to other PIR boards is a recurring positive, with several repeat buyers citing Materials Market as their preferred supplier.\u003cbr\u003e\u003cbr\u003e\u003cem\u003eSummarised by AI from customer reviews.\u003c\/em\u003e\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"100mm","offer_id":53771588206703,"sku":"3001017","price":50.39,"currency_code":"GBP","in_stock":true},{"title":"110mm","offer_id":53771588239471,"sku":"3001018","price":58.98,"currency_code":"GBP","in_stock":true},{"title":"120mm","offer_id":53771588272239,"sku":"3001019","price":63.6,"currency_code":"GBP","in_stock":true},{"title":"125mm","offer_id":53771588305007,"sku":"3001153","price":74.03,"currency_code":"GBP","in_stock":true},{"title":"130mm","offer_id":53771588337775,"sku":"3001020","price":73.28,"currency_code":"GBP","in_stock":true},{"title":"140mm","offer_id":53771588370543,"sku":"3001021","price":73.08,"currency_code":"GBP","in_stock":true},{"title":"150mm","offer_id":53771588403311,"sku":"3001022","price":75.59,"currency_code":"GBP","in_stock":true},{"title":"165mm","offer_id":53771588436079,"sku":"3001308","price":108.6,"currency_code":"GBP","in_stock":true},{"title":"200mm","offer_id":53771588468847,"sku":"3001309","price":140.95,"currency_code":"GBP","in_stock":true},{"title":"20mm","offer_id":53771588501615,"sku":"3001023","price":21.36,"currency_code":"GBP","in_stock":true},{"title":"25mm","offer_id":53771588534383,"sku":"3001024","price":19.98,"currency_code":"GBP","in_stock":true},{"title":"30mm","offer_id":53771588567151,"sku":"3001025","price":21.94,"currency_code":"GBP","in_stock":true},{"title":"40mm","offer_id":53771588599919,"sku":"3001026","price":26.88,"currency_code":"GBP","in_stock":true},{"title":"50mm","offer_id":53771588632687,"sku":"3001027","price":28.08,"currency_code":"GBP","in_stock":true},{"title":"60mm","offer_id":53771588665455,"sku":"3001028","price":36.06,"currency_code":"GBP","in_stock":true},{"title":"70mm","offer_id":53771588698223,"sku":"3001029","price":39.95,"currency_code":"GBP","in_stock":true},{"title":"75mm","offer_id":53771588730991,"sku":"3001030","price":41.99,"currency_code":"GBP","in_stock":true},{"title":"80mm","offer_id":53771588763759,"sku":"3001031","price":44.04,"currency_code":"GBP","in_stock":true},{"title":"90mm","offer_id":53771588796527,"sku":"3001032","price":48.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/100mm_celotex_sheet_logo.jpg?v=1783758935"}],"url":"https:\/\/supplyyard.co.uk\/collections\/insulation-boards.oembed","provider":"Supply Yard","version":"1.0","type":"link"}