150mm Celotex XR4150 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
150mm Celotex XR4150 is a rigid polyisocyanurate (PIR) insulation board and the thickest in the standard XR4000 line-up, the 110mm to 150mm boards Celotex builds for cut-to-fit work where space is not the limiting factor. At 150mm it carries the highest single-layer resistance of those everyday thicknesses, which is why it lands on low-energy and high-performance projects asking floors, walls and roofs to clear a demanding U-value in one pass.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. A declared thermal conductivity of 0.022 W/mK gives it a thermal resistance of 6.80 m²K/W, the highest figure in the standard 110mm to 150mm XR4000 range and within reach of 7.0, at a maximum board weight of around 6.10 kg per square metre. The rigid PIR core is faced both sides with a low-emissivity aluminium foil that improves performance against a sealed cavity air space, and the square edges close up for a continuous, tight-jointed layer.
At 6.80 m²K/W the 150mm board carries more resistance per sheet than any other everyday XR thickness, so a demanding floor or roof target is met with a single layer and the fewest boards, joints and tape runs: the build-up stays simple even as the performance climbs.
XR4150 is specified as a single cut-to-fit layer in solid and suspended floors, in warm flat and pitched roofs between or under joists and rafters, and across masonry walls and timber- and steel-framed systems, most often on low-energy and high-performance builds. Install it in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements and the height limit on external wall use. In wall build-ups it should be covered with a fire-rated lining such as 12.5mm plasterboard. Where the target sits at the demanding end and space allows the depth, the 150mm board reaches it in one layer.
Key Benefits of 150mm Celotex XR4150:
- 150mm rigid polyisocyanurate (PIR) board, the highest-resistance thickness in the standard 110mm to 150mm XR4000 range, for demanding single-layer targets.
- Thermal resistance (R-value) of 6.80 m²K/W, within reach of 7.0, for low-energy and high-performance envelopes.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a 150mm depth.
- Carries more resistance per sheet than any other everyday XR thickness, meeting a demanding target with the fewest boards and joints.
- Used across solid and suspended floors, warm flat and pitched roofs, masonry walls and timber- and steel-framed systems.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, tight joints and a continuous insulation layer.
- Manufactured with a blowing agent of zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), free of CFCs and HCFCs.
- Supplied as a single 2400mm x 1200mm board covering 2.88m², at a maximum board weight of around 6.10 kg per square metre.
- BBA certified (Certificate 25/7318) for defined pitched roof, dry lining and floor applications.
Good to know:
- Boards measure 2400mm x 1200mm and are sold individually, each covering 2.88m².
- The foil facing is printed on one side only: fit the board with the plain face towards the cavity for the rated thermal performance.
- The foil facing is not a vapour control layer; many floor and roof build-ups still need a separate VCL to manage interstitial condensation.
- In wall applications the board should be covered with a fire-rated lining, such as 12.5mm plasterboard.
- Celotex XR4000 should not be used in the external walls of buildings over 11 metres in height; check current Building Regulations for your project.
- PIR is moisture resistant but not waterproof: store boards flat, off the ground, dry and out of prolonged sunlight.
- Insulation UK offers a bespoke cutting service, supplying boards cut to your sizes to reduce waste and on-site mess.
When the target sits at the demanding end and there is depth to give it, 150mm Celotex XR4150 puts the highest single-layer resistance in the standard XR4000 range onto the floor, wall or roof, holding a tough U-value in one board.
Important Notice: 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.
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150mm Celotex XR4150 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
150mm Celotex XR4150 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
150mm Celotex XR4150 is a rigid polyisocyanurate (PIR) insulation board and the thickest in the standard XR4000 line-up, the 110mm to 150mm boards Celotex builds for cut-to-fit work where space is not the limiting factor. At 150mm it carries the highest single-layer resistance of those everyday thicknesses, which is why it lands on low-energy and high-performance projects asking floors, walls and roofs to clear a demanding U-value in one pass.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. A declared thermal conductivity of 0.022 W/mK gives it a thermal resistance of 6.80 m²K/W, the highest figure in the standard 110mm to 150mm XR4000 range and within reach of 7.0, at a maximum board weight of around 6.10 kg per square metre. The rigid PIR core is faced both sides with a low-emissivity aluminium foil that improves performance against a sealed cavity air space, and the square edges close up for a continuous, tight-jointed layer.
At 6.80 m²K/W the 150mm board carries more resistance per sheet than any other everyday XR thickness, so a demanding floor or roof target is met with a single layer and the fewest boards, joints and tape runs: the build-up stays simple even as the performance climbs.
XR4150 is specified as a single cut-to-fit layer in solid and suspended floors, in warm flat and pitched roofs between or under joists and rafters, and across masonry walls and timber- and steel-framed systems, most often on low-energy and high-performance builds. Install it in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements and the height limit on external wall use. In wall build-ups it should be covered with a fire-rated lining such as 12.5mm plasterboard. Where the target sits at the demanding end and space allows the depth, the 150mm board reaches it in one layer.
Key Benefits of 150mm Celotex XR4150:
- 150mm rigid polyisocyanurate (PIR) board, the highest-resistance thickness in the standard 110mm to 150mm XR4000 range, for demanding single-layer targets.
- Thermal resistance (R-value) of 6.80 m²K/W, within reach of 7.0, for low-energy and high-performance envelopes.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a 150mm depth.
- Carries more resistance per sheet than any other everyday XR thickness, meeting a demanding target with the fewest boards and joints.
- Used across solid and suspended floors, warm flat and pitched roofs, masonry walls and timber- and steel-framed systems.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, tight joints and a continuous insulation layer.
- Manufactured with a blowing agent of zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), free of CFCs and HCFCs.
- Supplied as a single 2400mm x 1200mm board covering 2.88m², at a maximum board weight of around 6.10 kg per square metre.
- BBA certified (Certificate 25/7318) for defined pitched roof, dry lining and floor applications.
Good to know:
- Boards measure 2400mm x 1200mm and are sold individually, each covering 2.88m².
- The foil facing is printed on one side only: fit the board with the plain face towards the cavity for the rated thermal performance.
- The foil facing is not a vapour control layer; many floor and roof build-ups still need a separate VCL to manage interstitial condensation.
- In wall applications the board should be covered with a fire-rated lining, such as 12.5mm plasterboard.
- Celotex XR4000 should not be used in the external walls of buildings over 11 metres in height; check current Building Regulations for your project.
- PIR is moisture resistant but not waterproof: store boards flat, off the ground, dry and out of prolonged sunlight.
- Insulation UK offers a bespoke cutting service, supplying boards cut to your sizes to reduce waste and on-site mess.
When the target sits at the demanding end and there is depth to give it, 150mm Celotex XR4150 puts the highest single-layer resistance in the standard XR4000 range onto the floor, wall or roof, holding a tough U-value in one board.
Important Notice: 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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
150mm Celotex XR4150 is a rigid polyisocyanurate (PIR) insulation board and the thickest in the standard XR4000 line-up, the 110mm to 150mm boards Celotex builds for cut-to-fit work where space is not the limiting factor. At 150mm it carries the highest single-layer resistance of those everyday thicknesses, which is why it lands on low-energy and high-performance projects asking floors, walls and roofs to clear a demanding U-value in one pass.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. A declared thermal conductivity of 0.022 W/mK gives it a thermal resistance of 6.80 m²K/W, the highest figure in the standard 110mm to 150mm XR4000 range and within reach of 7.0, at a maximum board weight of around 6.10 kg per square metre. The rigid PIR core is faced both sides with a low-emissivity aluminium foil that improves performance against a sealed cavity air space, and the square edges close up for a continuous, tight-jointed layer.
At 6.80 m²K/W the 150mm board carries more resistance per sheet than any other everyday XR thickness, so a demanding floor or roof target is met with a single layer and the fewest boards, joints and tape runs: the build-up stays simple even as the performance climbs.
XR4150 is specified as a single cut-to-fit layer in solid and suspended floors, in warm flat and pitched roofs between or under joists and rafters, and across masonry walls and timber- and steel-framed systems, most often on low-energy and high-performance builds. Install it in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including fire requirements and the height limit on external wall use. In wall build-ups it should be covered with a fire-rated lining such as 12.5mm plasterboard. Where the target sits at the demanding end and space allows the depth, the 150mm board reaches it in one layer.
Key Benefits of 150mm Celotex XR4150:
- 150mm rigid polyisocyanurate (PIR) board, the highest-resistance thickness in the standard 110mm to 150mm XR4000 range, for demanding single-layer targets.
- Thermal resistance (R-value) of 6.80 m²K/W, within reach of 7.0, for low-energy and high-performance envelopes.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a 150mm depth.
- Carries more resistance per sheet than any other everyday XR thickness, meeting a demanding target with the fewest boards and joints.
- Used across solid and suspended floors, warm flat and pitched roofs, masonry walls and timber- and steel-framed systems.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, tight joints and a continuous insulation layer.
- Manufactured with a blowing agent of zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), free of CFCs and HCFCs.
- Supplied as a single 2400mm x 1200mm board covering 2.88m², at a maximum board weight of around 6.10 kg per square metre.
- BBA certified (Certificate 25/7318) for defined pitched roof, dry lining and floor applications.
Good to know:
- Boards measure 2400mm x 1200mm and are sold individually, each covering 2.88m².
- The foil facing is printed on one side only: fit the board with the plain face towards the cavity for the rated thermal performance.
- The foil facing is not a vapour control layer; many floor and roof build-ups still need a separate VCL to manage interstitial condensation.
- In wall applications the board should be covered with a fire-rated lining, such as 12.5mm plasterboard.
- Celotex XR4000 should not be used in the external walls of buildings over 11 metres in height; check current Building Regulations for your project.
- PIR is moisture resistant but not waterproof: store boards flat, off the ground, dry and out of prolonged sunlight.
- Insulation UK offers a bespoke cutting service, supplying boards cut to your sizes to reduce waste and on-site mess.
When the target sits at the demanding end and there is depth to give it, 150mm Celotex XR4150 puts the highest single-layer resistance in the standard XR4000 range onto the floor, wall or roof, holding a tough U-value in one board.
Important Notice: 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.
