75mm Celotex GA4075 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
One of the most frequently specified depths in the general-purpose GA4000 range, 75mm Celotex GA4075 is a rigid polyisocyanurate (PIR) insulation board for use across floors, walls and roofs. It appears regularly on floor and pitched-roof specifications where 75mm is the called-for thickness.
The board measures 2400mm x 1200mm x 75mm and is sold individually for 2.88m² of cover. It combines a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.40 m²K/W, edging ahead of the 70mm board and giving floor and roof build-ups a healthy contribution towards their target U-value, all from a single board weighing around 2.78 kg per square metre.
Both faces of the board carry a low-emissivity aluminium foil over a closed-cell PIR core. Against a sealed cavity air space that reflective facing improves the U-value the build-up can reach, so the board often earns its keep beyond the lambda figure alone. Square edges mean boards meet flush with no profile to line up, which speeds fitting and helps keep the insulation layer free of the gaps that let heat slip through.
75mm GA4075 is widely used in pitched roofs, fitted between or under rafters in loft conversions and roof refurbishments, and laid in suspended timber and concrete floors, with timber-framed walls, internal dry lining and flat-roof build-ups also within the GA4000 range's scope. It should be installed in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Equally suited to new build and renovation, the 75mm board pairs a recognised, readily specified depth with dependable single-layer performance.
Key Benefits of 75mm Celotex GA4075:
- 75mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.40 m²K/W, a step up from the 70mm board.
- Declared thermal conductivity of 0.022 W/mK, keeping the build-up depth down for a given U-value.
- One of the most commonly specified GA4000 depths, well suited to floor and pitched-roof build-ups.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, gap-minimising joints across the insulation layer.
- Rigid and light at around 2.78 kg per square metre, easy to handle and cut with standard tools.
- 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.
- 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.
- 75mm is a popular single-layer thickness for floors and roofs; for lower U-value targets it can be doubled up or combined with another board.
- Celotex GA4000 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.
- The U-value of the finished element depends on the full build-up, not the board alone: confirm your target before ordering.
A go-to specified thickness, 75mm Celotex GA4075 brings reliable single-layer performance to floors and roofs while keeping specification straightforward and installation quick.
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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Product Information
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75mm Celotex GA4075 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
75mm Celotex GA4075 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
One of the most frequently specified depths in the general-purpose GA4000 range, 75mm Celotex GA4075 is a rigid polyisocyanurate (PIR) insulation board for use across floors, walls and roofs. It appears regularly on floor and pitched-roof specifications where 75mm is the called-for thickness.
The board measures 2400mm x 1200mm x 75mm and is sold individually for 2.88m² of cover. It combines a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.40 m²K/W, edging ahead of the 70mm board and giving floor and roof build-ups a healthy contribution towards their target U-value, all from a single board weighing around 2.78 kg per square metre.
Both faces of the board carry a low-emissivity aluminium foil over a closed-cell PIR core. Against a sealed cavity air space that reflective facing improves the U-value the build-up can reach, so the board often earns its keep beyond the lambda figure alone. Square edges mean boards meet flush with no profile to line up, which speeds fitting and helps keep the insulation layer free of the gaps that let heat slip through.
75mm GA4075 is widely used in pitched roofs, fitted between or under rafters in loft conversions and roof refurbishments, and laid in suspended timber and concrete floors, with timber-framed walls, internal dry lining and flat-roof build-ups also within the GA4000 range's scope. It should be installed in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Equally suited to new build and renovation, the 75mm board pairs a recognised, readily specified depth with dependable single-layer performance.
Key Benefits of 75mm Celotex GA4075:
- 75mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.40 m²K/W, a step up from the 70mm board.
- Declared thermal conductivity of 0.022 W/mK, keeping the build-up depth down for a given U-value.
- One of the most commonly specified GA4000 depths, well suited to floor and pitched-roof build-ups.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, gap-minimising joints across the insulation layer.
- Rigid and light at around 2.78 kg per square metre, easy to handle and cut with standard tools.
- 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.
- 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.
- 75mm is a popular single-layer thickness for floors and roofs; for lower U-value targets it can be doubled up or combined with another board.
- Celotex GA4000 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.
- The U-value of the finished element depends on the full build-up, not the board alone: confirm your target before ordering.
A go-to specified thickness, 75mm Celotex GA4075 brings reliable single-layer performance to floors and roofs while keeping specification straightforward and installation quick.
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
One of the most frequently specified depths in the general-purpose GA4000 range, 75mm Celotex GA4075 is a rigid polyisocyanurate (PIR) insulation board for use across floors, walls and roofs. It appears regularly on floor and pitched-roof specifications where 75mm is the called-for thickness.
The board measures 2400mm x 1200mm x 75mm and is sold individually for 2.88m² of cover. It combines a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.40 m²K/W, edging ahead of the 70mm board and giving floor and roof build-ups a healthy contribution towards their target U-value, all from a single board weighing around 2.78 kg per square metre.
Both faces of the board carry a low-emissivity aluminium foil over a closed-cell PIR core. Against a sealed cavity air space that reflective facing improves the U-value the build-up can reach, so the board often earns its keep beyond the lambda figure alone. Square edges mean boards meet flush with no profile to line up, which speeds fitting and helps keep the insulation layer free of the gaps that let heat slip through.
75mm GA4075 is widely used in pitched roofs, fitted between or under rafters in loft conversions and roof refurbishments, and laid in suspended timber and concrete floors, with timber-framed walls, internal dry lining and flat-roof build-ups also within the GA4000 range's scope. It should be installed in line with the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Equally suited to new build and renovation, the 75mm board pairs a recognised, readily specified depth with dependable single-layer performance.
Key Benefits of 75mm Celotex GA4075:
- 75mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.40 m²K/W, a step up from the 70mm board.
- Declared thermal conductivity of 0.022 W/mK, keeping the build-up depth down for a given U-value.
- One of the most commonly specified GA4000 depths, well suited to floor and pitched-roof build-ups.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Square edges for flush, gap-minimising joints across the insulation layer.
- Rigid and light at around 2.78 kg per square metre, easy to handle and cut with standard tools.
- 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.
- 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.
- 75mm is a popular single-layer thickness for floors and roofs; for lower U-value targets it can be doubled up or combined with another board.
- Celotex GA4000 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.
- The U-value of the finished element depends on the full build-up, not the board alone: confirm your target before ordering.
A go-to specified thickness, 75mm Celotex GA4075 brings reliable single-layer performance to floors and roofs while keeping specification straightforward and installation quick.
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.
