110mm Celotex XR4110 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
110mm Celotex XR4110 is a rigid polyisocyanurate (PIR) insulation board and the entry thickness in the XR4000 range, the boards Celotex builds for cut-to-fit work between and under rafters and joists. It picks up where the general-purpose GA4000 range tops out: where a single 100mm layer no longer reaches the target U-value, the 110mm XR4110 takes the next step in one board rather than two layers.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. With a declared thermal conductivity of 0.022 W/mK it carries a thermal resistance of 5.00 m²K/W, the entry figure in the XR4000 range and a step beyond the 4.50 m²K/W ceiling of the general-purpose GA4000 boards, at a maximum board weight of around 4.54 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 butt together for a continuous, tight-jointed layer.
The 110mm depth is the point of the board: it lifts single-layer thermal resistance to 5.00 m²K/W while staying slim enough to fit cleanly between standard rafter and joist depths, so one cut-to-fit layer can hit a target that would otherwise need a second board and the extra joint line that comes with it.
XR4110 is used as a single cut-to-fit layer between or under rafters and joists in pitched and flat roofs, across solid masonry walls and timber- and steel-framed systems, and in solid and suspended floors. 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. For new build and refurbishment alike, the 110mm board is the straightforward way to step up from the general-purpose range without changing how the boards handle on site.
Key Benefits of 110mm Celotex XR4110:
- 110mm rigid polyisocyanurate (PIR) board, the entry thickness in the XR4000 cut-to-fit range, for roofs, walls and floors.
- Thermal resistance (R-value) of 5.00 m²K/W, taking single-layer performance past the top of the general-purpose GA4000 range.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a slim 110mm build-up.
- Sized for cut-to-fit installation between and under rafters and joists, where a lower U-value is the target.
- Reaches a target in one layer that a 100mm board would need a second layer to meet, cutting joints and handling.
- 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 around 4.54 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 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.
As the first step into the XR4000 range, 110mm Celotex XR4110 breaks the 5.00 m²K/W mark in a single cut-to-fit layer, giving roofs and floors a clean way to reach lower U-values once the general-purpose boards have run out of depth.
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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110mm Celotex XR4110 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
110mm Celotex XR4110 PIR Insulation Board 2.4m x 1.2m - 2.88m2 per board
110mm Celotex XR4110 is a rigid polyisocyanurate (PIR) insulation board and the entry thickness in the XR4000 range, the boards Celotex builds for cut-to-fit work between and under rafters and joists. It picks up where the general-purpose GA4000 range tops out: where a single 100mm layer no longer reaches the target U-value, the 110mm XR4110 takes the next step in one board rather than two layers.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. With a declared thermal conductivity of 0.022 W/mK it carries a thermal resistance of 5.00 m²K/W, the entry figure in the XR4000 range and a step beyond the 4.50 m²K/W ceiling of the general-purpose GA4000 boards, at a maximum board weight of around 4.54 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 butt together for a continuous, tight-jointed layer.
The 110mm depth is the point of the board: it lifts single-layer thermal resistance to 5.00 m²K/W while staying slim enough to fit cleanly between standard rafter and joist depths, so one cut-to-fit layer can hit a target that would otherwise need a second board and the extra joint line that comes with it.
XR4110 is used as a single cut-to-fit layer between or under rafters and joists in pitched and flat roofs, across solid masonry walls and timber- and steel-framed systems, and in solid and suspended floors. 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. For new build and refurbishment alike, the 110mm board is the straightforward way to step up from the general-purpose range without changing how the boards handle on site.
Key Benefits of 110mm Celotex XR4110:
- 110mm rigid polyisocyanurate (PIR) board, the entry thickness in the XR4000 cut-to-fit range, for roofs, walls and floors.
- Thermal resistance (R-value) of 5.00 m²K/W, taking single-layer performance past the top of the general-purpose GA4000 range.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a slim 110mm build-up.
- Sized for cut-to-fit installation between and under rafters and joists, where a lower U-value is the target.
- Reaches a target in one layer that a 100mm board would need a second layer to meet, cutting joints and handling.
- 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 around 4.54 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 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.
As the first step into the XR4000 range, 110mm Celotex XR4110 breaks the 5.00 m²K/W mark in a single cut-to-fit layer, giving roofs and floors a clean way to reach lower U-values once the general-purpose boards have run out of depth.
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
110mm Celotex XR4110 is a rigid polyisocyanurate (PIR) insulation board and the entry thickness in the XR4000 range, the boards Celotex builds for cut-to-fit work between and under rafters and joists. It picks up where the general-purpose GA4000 range tops out: where a single 100mm layer no longer reaches the target U-value, the 110mm XR4110 takes the next step in one board rather than two layers.
Each board measures 2400mm x 1200mm, covers 2.88m² and is sold individually. With a declared thermal conductivity of 0.022 W/mK it carries a thermal resistance of 5.00 m²K/W, the entry figure in the XR4000 range and a step beyond the 4.50 m²K/W ceiling of the general-purpose GA4000 boards, at a maximum board weight of around 4.54 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 butt together for a continuous, tight-jointed layer.
The 110mm depth is the point of the board: it lifts single-layer thermal resistance to 5.00 m²K/W while staying slim enough to fit cleanly between standard rafter and joist depths, so one cut-to-fit layer can hit a target that would otherwise need a second board and the extra joint line that comes with it.
XR4110 is used as a single cut-to-fit layer between or under rafters and joists in pitched and flat roofs, across solid masonry walls and timber- and steel-framed systems, and in solid and suspended floors. 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. For new build and refurbishment alike, the 110mm board is the straightforward way to step up from the general-purpose range without changing how the boards handle on site.
Key Benefits of 110mm Celotex XR4110:
- 110mm rigid polyisocyanurate (PIR) board, the entry thickness in the XR4000 cut-to-fit range, for roofs, walls and floors.
- Thermal resistance (R-value) of 5.00 m²K/W, taking single-layer performance past the top of the general-purpose GA4000 range.
- Declared thermal conductivity of 0.022 W/mK, delivering that resistance in a slim 110mm build-up.
- Sized for cut-to-fit installation between and under rafters and joists, where a lower U-value is the target.
- Reaches a target in one layer that a 100mm board would need a second layer to meet, cutting joints and handling.
- 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 around 4.54 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 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.
As the first step into the XR4000 range, 110mm Celotex XR4110 breaks the 5.00 m²K/W mark in a single cut-to-fit layer, giving roofs and floors a clean way to reach lower U-values once the general-purpose boards have run out of depth.
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.
