Free Delivery with Orders over £500 Inc Vat, Deliveries in Mainland England Only. Alternative Equal brands maybe sent as substitutes if not available in certain geographical areas. CHRISTMAS HOLIDAYS FROM 23RD DECEMBER 2025-5TH JANUARY 2026. ANY ORDERS PLACED BETWEEN THESE DATES WILL BE PROCESSED ON THE 5TH JANUARY FOR DELIVERY THAT WEEK. FOR ANY ORDERS REQUIRED UPTO THE 23RD DECEMBER THEY MUST BE ORDERED BY THURSDAY 18TH DECEMBER.

Insulation Boards

74 products

  • 75mm EcoTherm Eco-Versal PIR Insulation Board 2400mm x 1200mm

    EcoTherm 75mm EcoTherm Eco-Versal PIR Insulation Board 2400mm x 1200mm

      EcoTherm Eco-Versal 75mm Insulation PIR Boards are versatile thermal solutions that can be used for both new build and refurbishment applications. These 75mm rigid polyisocyanurate (PIR) boards consist of a core made of fibre-free material sandwiched between two layers of aluminium foil. EcoTherm 75mm insulation boards are extremely versatile and can be used for floors, walls, ceilings, pitched roofs, and more. These 75mm EcoTherm insulation boards are second only in thermal efficiency to phenolic insulation, with a low lambda value of 0.022 W/mK. 75mm EcoTherm insulation boards are cost-effective and eco-friendly, making them an excellent choice to reduce CO2 emissions. They can be used in many building projects. Technical Specification Material Type: PIR Thickness: 75mm Width: 1200mm Length: 2400mm Sales Unit: Board Sales Unit Coverage: 2.88m2 Brand: EcoTherm Manufacturer's Reference: 100000012562 Weight: 2.73kg/m2 Thermal Conductivity: 0.022W/mK

    £33.99

  • 25mm Celotex TB4025 PIR Insulation Board 2400mm x 1200mm

    Celotex 25mm Celotex TB4025 PIR Insulation Board 2400mm x 1200mm

      Celotex TB4025 PIR Insulation 25mm can be used in a variety floor, wall and roof applications and to reduce cold-bridging. These 25mm Celotex Insulation boards contain a combination of eco-friendly blowing agents with a low potential for global warming. They have been shown to have zero ozone destruction potential (ODP). 25mm Celotex PIR boards feature a low-emissivity foil front that improves thermal performance in sealed cavity air spaces, lowering the U value. 25mm Celotex PIR Insulation boards are lightweight and rigid so they can be easily transported, used and fitted. Celotex TB4025 has been certified by the BBA as suitable for roof, wall and floor applications if it's installed, used and maintained in accordance with the certificate. Celotex TB4025 is equipped with a BRE Green Guide rating A, which can be used in your BREEAM assessments to show environmental performance. Technical Specification Material Type: PIR Thickness: 25mm Width: 1200mm Length: 2400mm Pieces Per Pack: 16 Packs Per Pallet: 6 Sales Unit: Board Sales Unit Coverage: 2.88m2 Brand: Celotex Manufacturer's Reference: TB4025 Weight: 0.95kg/m2 Thermal Conductivity: 0.022W/mK

    £13.76

  • Kingspan Thermaroof TR27 Flat Roof Insulation Board 1200mm x 1200mm (FULL PACKS ONLY)

    Kingspan Kingspan Thermaroof TR27 Flat Roof Insulation Board 1200mm x 1200mm (FULL PACKS ONLY)

    Kingspan Thermaroof TR27 LPC/FM is a high performance insulation with a fibre-free rigid thermoset polyisocyanurate (PIR) core. With thermal conductivities as low as 0.024 W/mK, it is used to insulate flat roofs waterproofed with fully adhered single-ply, partially bonded built-up felt, mastic asphalt and cold liquid applied waterproofing.

    £112.58 - £196.33

  • 75mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (12/Pack-Full Packs Only)

    Recticel 75mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (12/Pack-Full Packs Only)

      Recticel Eurowall Cavity Wall Insulation Board is a partial fill cavity wall solution with a rigid polyurethane foam core. Belonging to the PIR range of insulation boards, it has a low thermal conductivity of just 0.022 W/mK which means maximum heat retention within the building structure. These Recticel cavity boards have precision-cut straight edges, which means that the boards can butt up tightly against one another, minimising air gaps. They are flanked on either side by a multi-layered kraft and metal foil facing, which acts as a gas diffusion layer across air space. Eurowall cavity boards come in 1200mm x 450mm, ideal to fit between brick ties in masonry cavity walls. They can be used in both new builds and extensions and will enhance the thermal performance of any cavity space. *SOLD IN FULL PACKS ONLY* Technical Specification Material Type: PIR Thickness: 75mm Width: 450mm Length: 1200mm Brand: Recticel Thermal Conductivity: 0.022W/mK

    £87.50

  • 100mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (10/Pack-Full Packs Only)

    Recticel 100mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (10/Pack-Full Packs Only)

      Recticel Eurowall Cavity Wall Insulation Board is a partial fill cavity wall solution with a rigid polyurethane foam core. Belonging to the PIR range of insulation boards, it has a low thermal conductivity of just 0.022 W/mK which means maximum heat retention within the building structure. These Recticel cavity boards have precision-cut straight edges, which means that the boards can butt up tightly against one another, minimising air gaps. They are flanked on either side by a multi-layered kraft and metal foil facing, which acts as a gas diffusion layer across air space. Eurowall cavity boards come in 1200mm x 450mm, ideal to fit between brick ties in masonry cavity walls. They can be used in both new builds and extensions and will enhance the thermal performance of any cavity space. *SOLD IN FULL PACKS ONLY* Technical Specification Material Type: PIR Thickness: 100mm Width: 450mm Length: 1200mm Sales Unit: Pack Sales Unit Coverage: 5.4m2 Brand: Recticel Thermal Conductivity: 0.022W/mK

    £94.00

  • 75mm EcoTherm Eco-Cavity Wall Insulation Board 1200mm x 450mm (3.24m2/Pack)

    EcoTherm 75mm EcoTherm Eco-Cavity Wall Insulation Board 1200mm x 450mm (3.24m2/Pack)

    EcoTherm Eco-Cavity Wall Insulation Board is a partial fill cavity wall insulation solution designed for brick and block masonry walls. With a thermal conductivity of just 0.022 W/mK, it brings the massive thermal benefit of PIR insulation as well as aluminium foil facings on either side that prevent radiated heat being passed through the air space. These EcoTherm cavity boards are specifically designed to work in conjunction with traditional wall tie spacing, and can be used both in new builds and extensions of existing properties. Like other UK manufactured PIR insulation, they carry BBA certification. Eco-Cavity boards are manufactured with a CFC/HCFC free blowing agent, making them environmentally friendly. The boards are sized at 1200mm x 450mm, and come in plastic wrapped packs with multiple boards in each. Technical Specification Material Type: PIR Thickness: 75mm Width: 450mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 20 Sales Unit: Pack Sales Unit Coverage: 3.24m2 Brand: EcoTherm Manufacturer's Reference: 100000018965 Weight: 2.78kg/m2 Thermal Conductivity: 0.022W/mK

    £49.15

  • 90mm Kingspan Kooltherm K106 Cavity Insulation Board 1200mm x 450mm (2.16m2/Pack)

    Kingspan 90mm Kingspan Kooltherm K106 Cavity Insulation Board 1200mm x 450mm (2.16m2/Pack)

    Kingspan Kooltherm K106 Cavity Board is an elite full-fill cavity insulation that is unrivalled in terms of thermal performance. Specifically designed for full fill applications that have a residual 10mm cavity, this phenolic insulation board delivers a lambda value of just 0.018 W/mK. The Kooltherm K106 insulation boards have a composite foil facing on one side and a polypropylene fleece on the other. This fleece is water-tight and vapour, preventing moisture from penetrating the building envelope. These Kingspan K106 cavity boards are made using a particular blowing agent that instills in them low GWP and zero ODP, which means minimal environmental damage. The boards are sized at 1200mm x 450mm making them light and easy to install. They have a compressive strength of over 100 kPa at 10% compression. Technical Specification  Material Type: Phenolic Thickness: 90mm Width: 450mm Length: 1200mm Pieces Per Pack: 4 Sales Unit: Pack Sales Unit Coverage: 2.16m2 Brand: Kingspan Weight: 3.36kg/m2 Thermal Conductivity: 0.018W/mK Facing: Polypropylene Fleece / Composite Foil Application: Cavity Wall Insulation

    £91.66

  • 50mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (20/Pack-Full Packs Only)

    Recticel 50mm Recticel Eurowall Cavity Wall Insulation Board 1200mm x 450mm (20/Pack-Full Packs Only)

      Recticel Eurowall Cavity Wall Insulation Board is a partial fill cavity wall solution with a rigid polyurethane foam core. Belonging to the PIR range of insulation boards, it has a low thermal conductivity of just 0.022 W/mK which means maximum heat retention within the building structure. These Recticel cavity boards have precision-cut straight edges, which means that the boards can butt up tightly against one another, minimising air gaps. They are flanked on either side by a multi-layered kraft and metal foil facing, which acts as a gas diffusion layer across air space. Eurowall cavity boards come in 1200mm x 450mm, ideal to fit between brick ties in masonry cavity walls. They can be used in both new builds and extensions and will enhance the thermal performance of any cavity space. *SOLD IN FULL PACKS ONLY* Technical Specification Material Type: PIR Thickness: 50mm Width: 450mm Length: 1200mm Sales Unit Coverage: 10.8m2 Brand: Recticel Thermal Conductivity: 0.022W/mK

    £109.00

  • Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (Full Packs Only)

    Kingspan Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm (Full Packs Only)

      Kingspan Kooltherm K112 Framing Board is a top-of-the-range thermal insulation solution for timber and steel frame systems. With a core of fibre-free thermoset phenolic insulation, it outclasses all other insulation boards in terms of thermal performance, with a lambda value of just 0.019 W/mK across all thicknesses. Designed to be fitted between studwork, the Kooltherm K112 insulation boards are compatible with both timber and steel frame constructions in new build and refurbishment projects alike. They can also be used as a insulating sheathing. With composite foil facings on either side, these Kingspan K112 framing boards are impervious to air infiltration or the encroachment of water vapour. All boards are 2400mm x 1200mm in size, giving good coverage per unit. Manufactured using eco-friendly blowing agents, they also have minimal environmental impact. *SOLD IN FULL PACKS ONLY*

    £368.24 - £484.73

  • 100mm EcoTherm Eco-Cavity Wall Insulation Board 1200mm x 450mm (2.7m2/Pack)

    EcoTherm 100mm EcoTherm Eco-Cavity Wall Insulation Board 1200mm x 450mm (2.7m2/Pack)

    EcoTherm Eco-Cavity Wall Insulation Board is a partial fill cavity wall insulation solution designed for brick and block masonry walls. With a thermal conductivity of just 0.022 W/mK, it brings the massive thermal benefit of PIR insulation as well as aluminium foil facings on either side that prevent radiated heat being passed through the air space. These EcoTherm cavity boards are specifically designed to work in conjunction with traditional wall tie spacing, and can be used both in new builds and extensions of existing properties. Like other UK manufactured PIR insulation, they carry BBA certification. Eco-Cavity boards are manufactured with a CFC/HCFC free blowing agent, making them environmentally friendly. The boards are sized at 1200mm x 450mm, and come in plastic wrapped packs with multiple boards in each. Technical Specification Material Type: PIR Thickness: 100mm Width: 450mm Length: 1200mm Pieces Per Pack: 5 Packs Per Pallet: 20 Sales Unit: Pack Sales Unit Coverage: 2.7m2 Brand: EcoTherm Manufacturer's Reference: 100000018966 Weight: 3.52kg/m2 Thermal Conductivity: 0.022W/mK

    £52.51

  • 100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm (3.24m2/Pack)

    Celotex 100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm (3.24m2/Pack)

    Celotex CW4000 Cavity Wall Insulation Board is a polyisocyanurate (PIR) insulation solution manufactured for use in partial fill cavity walls. Comprised of a PIR core sandwiched between low emissivity foil facings on both sides, these boards have a thermal conductivity of just 0.022 W/mK. This makes them a far more effective thermal cavity solution than either rock or glass wool insulation. These cavity insulation batts fit snugly in between cavity wall ties, and are perfect for use in new builds and extensions with a masonry wall. Celotex CW4000 is a BBA certified solution and is the leading brand in the market for PIR cavity wall insulation. Sized at 1200mm x 450mm, these boards are rigid, lightweight and easy to handle and install. They are sold in wrapped plastic packs. Technical Specification  Material Type: PIR Thickness: 100mm Width: 450mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 16 Sales Unit: Pack Sales Unit Coverage: 3.24m2 Brand: Celotex Manufacturer's Reference: CW4100 Weight: 3.65kg/m2 Thermal Conductivity: 0.022W/mK

    £56.50

  • 75mm Celotex CW4075 Cavity Wall Insulation Board 1200mm x 450mm (4.32m2/Pack)

    Celotex 75mm Celotex CW4075 Cavity Wall Insulation Board 1200mm x 450mm (4.32m2/Pack)

    Celotex CW4000 Cavity Wall Insulation Board is a polyisocyanurate (PIR) insulation solution manufactured for use in partial fill cavity walls. Comprised of a PIR core sandwiched between low emissivity foil facings on both sides, these boards have a thermal conductivity of just 0.022 W/mK. This makes them a far more effective thermal cavity solution than either rock or glass wool insulation. These cavity insulation batts fit snugly in between cavity wall ties, and are perfect for use in new builds and extensions with a masonry wall. Celotex CW4000 is a BBA certified solution and is the leading brand in the market for PIR cavity wall insulation. Sized at 1200mm x 450mm, these boards are rigid, lightweight and easy to handle and install. They are sold in wrapped plastic packs. Technical Specification Material Type: PIR Thickness: 75mm Width: 450mm Length: 1200mm Pieces Per Pack: 8 Packs Per Pallet: 16 Sales Unit: Pack Sales Unit Coverage: 4.32m2 Brand: Celotex Manufacturer's Reference: CW4075 Weight: 2.78kg/m2 Thermal Conductivity: 0.022W/mK

    £58.87

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