70mm Celotex GA4070 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
70mm Celotex GA4070 PIR Insulation Board is a rigid polyisocyanurate (PIR) insulation board from the general-purpose GA4000 range, sitting in the middle of the range for thermal performance. It is a widely used mid-range thickness, specified across floors, walls and roofs where a single layer needs to deliver meaningful thermal resistance without taking up excessive depth.
Measuring 2400mm x 1200mm x 70mm and sold individually for 2.88m² of cover, the board pairs a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.15 m²K/W. That places it a clear step above the 50mm and 60mm boards, giving a build-up more headroom against its target U-value while the board itself, at roughly 2.61 kg per square metre, stays straightforward to handle.
What makes 70mm a practical choice is the balance it strikes: enough closed-cell PIR to carry a useful R-value in one layer, faced both sides with a low-emissivity aluminium foil that lifts performance where it meets a sealed cavity air space. The straight, square edges butt cleanly together, which keeps the insulation layer continuous and helps limit the gaps that undermine thermal performance on site.
On site, 70mm GA4070 is commonly laid in suspended timber and concrete floors, fitted in pitched roofs between or under rafters, and used in timber-framed walls and internal dry lining, with flat-roof build-ups also within the GA4000 range's scope. It should be installed to the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Whether the job is a new build or a refurbishment, the 70mm board offers a dependable middle ground between slimness and single-layer performance.
Key Benefits of 70mm Celotex GA4070:
- 70mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.15 m²K/W, a clear step up from the 50mm and 60mm boards.
- Declared thermal conductivity of 0.022 W/mK, keeping the required thickness down for a given U-value.
- A practical mid-range thickness that carries useful single-layer performance without excessive depth.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Straight, square edges for clean, tight joints and a continuous insulation layer.
- Rigid and light at roughly 2.61 kg per square metre, simple 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.
- A single 70mm layer suits many floor and roof build-ups; for lower U-value targets it can be combined with another thickness.
- 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 true middle-of-the-range all-rounder, 70mm Celotex GA4070 brings solid single-layer thermal resistance to floors, walls and roofs while staying simple to specify and quick to fit.
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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70mm Celotex GA4070 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
70mm Celotex GA4070 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per sheet
70mm Celotex GA4070 PIR Insulation Board is a rigid polyisocyanurate (PIR) insulation board from the general-purpose GA4000 range, sitting in the middle of the range for thermal performance. It is a widely used mid-range thickness, specified across floors, walls and roofs where a single layer needs to deliver meaningful thermal resistance without taking up excessive depth.
Measuring 2400mm x 1200mm x 70mm and sold individually for 2.88m² of cover, the board pairs a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.15 m²K/W. That places it a clear step above the 50mm and 60mm boards, giving a build-up more headroom against its target U-value while the board itself, at roughly 2.61 kg per square metre, stays straightforward to handle.
What makes 70mm a practical choice is the balance it strikes: enough closed-cell PIR to carry a useful R-value in one layer, faced both sides with a low-emissivity aluminium foil that lifts performance where it meets a sealed cavity air space. The straight, square edges butt cleanly together, which keeps the insulation layer continuous and helps limit the gaps that undermine thermal performance on site.
On site, 70mm GA4070 is commonly laid in suspended timber and concrete floors, fitted in pitched roofs between or under rafters, and used in timber-framed walls and internal dry lining, with flat-roof build-ups also within the GA4000 range's scope. It should be installed to the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Whether the job is a new build or a refurbishment, the 70mm board offers a dependable middle ground between slimness and single-layer performance.
Key Benefits of 70mm Celotex GA4070:
- 70mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.15 m²K/W, a clear step up from the 50mm and 60mm boards.
- Declared thermal conductivity of 0.022 W/mK, keeping the required thickness down for a given U-value.
- A practical mid-range thickness that carries useful single-layer performance without excessive depth.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Straight, square edges for clean, tight joints and a continuous insulation layer.
- Rigid and light at roughly 2.61 kg per square metre, simple 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.
- A single 70mm layer suits many floor and roof build-ups; for lower U-value targets it can be combined with another thickness.
- 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 true middle-of-the-range all-rounder, 70mm Celotex GA4070 brings solid single-layer thermal resistance to floors, walls and roofs while staying simple to specify and quick to fit.
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
70mm Celotex GA4070 PIR Insulation Board is a rigid polyisocyanurate (PIR) insulation board from the general-purpose GA4000 range, sitting in the middle of the range for thermal performance. It is a widely used mid-range thickness, specified across floors, walls and roofs where a single layer needs to deliver meaningful thermal resistance without taking up excessive depth.
Measuring 2400mm x 1200mm x 70mm and sold individually for 2.88m² of cover, the board pairs a declared thermal conductivity of 0.022 W/mK with a thermal resistance of 3.15 m²K/W. That places it a clear step above the 50mm and 60mm boards, giving a build-up more headroom against its target U-value while the board itself, at roughly 2.61 kg per square metre, stays straightforward to handle.
What makes 70mm a practical choice is the balance it strikes: enough closed-cell PIR to carry a useful R-value in one layer, faced both sides with a low-emissivity aluminium foil that lifts performance where it meets a sealed cavity air space. The straight, square edges butt cleanly together, which keeps the insulation layer continuous and helps limit the gaps that undermine thermal performance on site.
On site, 70mm GA4070 is commonly laid in suspended timber and concrete floors, fitted in pitched roofs between or under rafters, and used in timber-framed walls and internal dry lining, with flat-roof build-ups also within the GA4000 range's scope. It should be installed to the latest Celotex technical guidance, the project specification and current Building Regulations, including the height limit on external wall use. Whether the job is a new build or a refurbishment, the 70mm board offers a dependable middle ground between slimness and single-layer performance.
Key Benefits of 70mm Celotex GA4070:
- 70mm rigid polyisocyanurate (PIR) insulation board from the multi-application GA4000 range, for floors, walls and roofs.
- Thermal resistance (R-value) of 3.15 m²K/W, a clear step up from the 50mm and 60mm boards.
- Declared thermal conductivity of 0.022 W/mK, keeping the required thickness down for a given U-value.
- A practical mid-range thickness that carries useful single-layer performance without excessive depth.
- Low-emissivity aluminium foil facings on both sides, improving performance against sealed and cavity air spaces.
- Straight, square edges for clean, tight joints and a continuous insulation layer.
- Rigid and light at roughly 2.61 kg per square metre, simple 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.
- A single 70mm layer suits many floor and roof build-ups; for lower U-value targets it can be combined with another thickness.
- 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 true middle-of-the-range all-rounder, 70mm Celotex GA4070 brings solid single-layer thermal resistance to floors, walls and roofs while staying simple to specify and quick to fit.
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.
