100mm Knauf Loft Roll 44 Combi-cut 1140mm x 12.18m - 13.89m2 per pack
Knauf Loft Roll 44 (100mm) is a glass mineral wool loft insulation roll for insulating cold pitched roofs at ceiling level, and it can also be used between joists in suspended timber floors. One of the most widely used loft insulation products in the UK, it is a reliable, affordable and easy-to-install choice for builders, developers and homeowners working to meet building regulation requirements. The 100mm thickness is laid as the first layer, filling fully between ceiling joists at either 400mm or 600mm centres, before cross-laid layers are added over the top to reach the total depth required. Building regulations for roofs are set as U-value targets rather than fixed depths, and around 270mm of mineral wool is the depth commonly used to meet them in England and Wales, with Scotland generally requiring more. In new build properties, total depths of 400mm to 500mm are typical.
Thermal conductivity is 0.044 W/mK and thermal resistance is 2.25 m²K/W, giving reliable thermal performance for loft applications. As a glass mineral wool, it also offers a degree of acoustic absorption, helping to soften airborne sound through the ceiling. Each roll measures 1140mm wide by 12.18m long and covers 13.89m², and carries a Euroclass A1 non-combustible reaction-to-fire classification, the best possible rating, meaning the product does not burn.
The combi-cut format means the roll is partially perforated to give widths of 2 x 570mm or 3 x 380mm, so it can be split to sit neatly between joists at standard centres or laid uncut as a full-width cross-laid layer. This reduces cutting and offcuts on site, speeding up installation and helping maintain continuous coverage with fewer gaps.
Manufactured using ECOSE® Technology, Knauf's bio-based binder, it contains no added formaldehyde or phenol, is CFC and HCFC free, and has zero ozone depletion potential. Made with up to 80% recycled glass content, it is one of the more environmentally responsible loft insulation products available. Modern manufacturing means it is classed as low itch and more pleasant to handle, though gloves and basic protection remain sensible when working with any mineral wool. Rot proof, odourless and non-hygroscopic, it will not attract rodents or support the growth of mould, fungi or bacteria, and will last for the lifetime of the building.
For best results, install in line with the Knauf Loft Roll Installation Guide and the project specification, taking care not to block eaves ventilation. A full step-by-step walkthrough is available in the loft insulation guide Suitable for both new build and renovation work, it offers a straightforward route to improving loft thermal performance and reducing heat loss.
Benefits
- Thermal conductivity of 0.044 W/mK: reliable, effective thermal performance for loft applications
- Euroclass A1 non-combustible: the best possible reaction-to-fire classification, meaning the product does not burn
- Combi-cut format, partially perforated at 2 x 570mm and 3 x 380mm to suit standard joist centres
- 13.89m² coverage per roll, helping reduce joins and speed up installation
- Designed as the base layer between ceiling joists at 100mm depth
- Manufactured with ECOSE® Technology, a bio-based binder with no added formaldehyde or phenol
- Made with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential
- Rot proof, odourless and non-hygroscopic: will not attract vermin or support mould or fungi
- Lightweight, low-itch and easy to handle on site
- CCPI Verification Mark (certificate number 000600173/0627)
- BRE Green Guide rating A+
Good to know
- Thickness: 100mm; width: 2 x 570mm or 3 x 380mm; length: 12.18m; coverage: 13.89m² per roll
- Thermal resistance: 2.25 m²K/W; vapour resistivity: 5.00 MNs/g.m
- Packs per pallet: 24; pallet product code: 2404154
- 100mm plus 170mm gives 270mm total, the depth commonly used to meet loft U-value targets in England and Wales
- 100mm plus 2 x 200mm gives 500mm total, for a U-value of approximately 0.09 W/m²K where maximum performance is wanted
- Keep insulation clear of downlights and other heat-producing fixtures, using non-combustible covers where required
- Compliant with BS EN 13162:2012+A1:2015; manufactured to ISO 9001, ISO 14001, ISO 45001 and ISO 50001
- Store indoors, dry and flat; protect from prolonged sunlight and moisture
- Always refer to the Knauf Loft Roll Installation Guide before installation
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100mm Knauf Loft Roll 44 Combi-cut 1140mm x 12.18m - 13.89m2 per pack
100mm Knauf Loft Roll 44 Combi-cut 1140mm x 12.18m - 13.89m2 per pack
Knauf Loft Roll 44 (100mm) is a glass mineral wool loft insulation roll for insulating cold pitched roofs at ceiling level, and it can also be used between joists in suspended timber floors. One of the most widely used loft insulation products in the UK, it is a reliable, affordable and easy-to-install choice for builders, developers and homeowners working to meet building regulation requirements. The 100mm thickness is laid as the first layer, filling fully between ceiling joists at either 400mm or 600mm centres, before cross-laid layers are added over the top to reach the total depth required. Building regulations for roofs are set as U-value targets rather than fixed depths, and around 270mm of mineral wool is the depth commonly used to meet them in England and Wales, with Scotland generally requiring more. In new build properties, total depths of 400mm to 500mm are typical.
Thermal conductivity is 0.044 W/mK and thermal resistance is 2.25 m²K/W, giving reliable thermal performance for loft applications. As a glass mineral wool, it also offers a degree of acoustic absorption, helping to soften airborne sound through the ceiling. Each roll measures 1140mm wide by 12.18m long and covers 13.89m², and carries a Euroclass A1 non-combustible reaction-to-fire classification, the best possible rating, meaning the product does not burn.
The combi-cut format means the roll is partially perforated to give widths of 2 x 570mm or 3 x 380mm, so it can be split to sit neatly between joists at standard centres or laid uncut as a full-width cross-laid layer. This reduces cutting and offcuts on site, speeding up installation and helping maintain continuous coverage with fewer gaps.
Manufactured using ECOSE® Technology, Knauf's bio-based binder, it contains no added formaldehyde or phenol, is CFC and HCFC free, and has zero ozone depletion potential. Made with up to 80% recycled glass content, it is one of the more environmentally responsible loft insulation products available. Modern manufacturing means it is classed as low itch and more pleasant to handle, though gloves and basic protection remain sensible when working with any mineral wool. Rot proof, odourless and non-hygroscopic, it will not attract rodents or support the growth of mould, fungi or bacteria, and will last for the lifetime of the building.
For best results, install in line with the Knauf Loft Roll Installation Guide and the project specification, taking care not to block eaves ventilation. A full step-by-step walkthrough is available in the loft insulation guide Suitable for both new build and renovation work, it offers a straightforward route to improving loft thermal performance and reducing heat loss.
Benefits
- Thermal conductivity of 0.044 W/mK: reliable, effective thermal performance for loft applications
- Euroclass A1 non-combustible: the best possible reaction-to-fire classification, meaning the product does not burn
- Combi-cut format, partially perforated at 2 x 570mm and 3 x 380mm to suit standard joist centres
- 13.89m² coverage per roll, helping reduce joins and speed up installation
- Designed as the base layer between ceiling joists at 100mm depth
- Manufactured with ECOSE® Technology, a bio-based binder with no added formaldehyde or phenol
- Made with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential
- Rot proof, odourless and non-hygroscopic: will not attract vermin or support mould or fungi
- Lightweight, low-itch and easy to handle on site
- CCPI Verification Mark (certificate number 000600173/0627)
- BRE Green Guide rating A+
Good to know
- Thickness: 100mm; width: 2 x 570mm or 3 x 380mm; length: 12.18m; coverage: 13.89m² per roll
- Thermal resistance: 2.25 m²K/W; vapour resistivity: 5.00 MNs/g.m
- Packs per pallet: 24; pallet product code: 2404154
- 100mm plus 170mm gives 270mm total, the depth commonly used to meet loft U-value targets in England and Wales
- 100mm plus 2 x 200mm gives 500mm total, for a U-value of approximately 0.09 W/m²K where maximum performance is wanted
- Keep insulation clear of downlights and other heat-producing fixtures, using non-combustible covers where required
- Compliant with BS EN 13162:2012+A1:2015; manufactured to ISO 9001, ISO 14001, ISO 45001 and ISO 50001
- Store indoors, dry and flat; protect from prolonged sunlight and moisture
- Always refer to the Knauf Loft Roll Installation Guide before installation
Original: $32.99
-65%$32.99
$11.55Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Knauf Loft Roll 44 (100mm) is a glass mineral wool loft insulation roll for insulating cold pitched roofs at ceiling level, and it can also be used between joists in suspended timber floors. One of the most widely used loft insulation products in the UK, it is a reliable, affordable and easy-to-install choice for builders, developers and homeowners working to meet building regulation requirements. The 100mm thickness is laid as the first layer, filling fully between ceiling joists at either 400mm or 600mm centres, before cross-laid layers are added over the top to reach the total depth required. Building regulations for roofs are set as U-value targets rather than fixed depths, and around 270mm of mineral wool is the depth commonly used to meet them in England and Wales, with Scotland generally requiring more. In new build properties, total depths of 400mm to 500mm are typical.
Thermal conductivity is 0.044 W/mK and thermal resistance is 2.25 m²K/W, giving reliable thermal performance for loft applications. As a glass mineral wool, it also offers a degree of acoustic absorption, helping to soften airborne sound through the ceiling. Each roll measures 1140mm wide by 12.18m long and covers 13.89m², and carries a Euroclass A1 non-combustible reaction-to-fire classification, the best possible rating, meaning the product does not burn.
The combi-cut format means the roll is partially perforated to give widths of 2 x 570mm or 3 x 380mm, so it can be split to sit neatly between joists at standard centres or laid uncut as a full-width cross-laid layer. This reduces cutting and offcuts on site, speeding up installation and helping maintain continuous coverage with fewer gaps.
Manufactured using ECOSE® Technology, Knauf's bio-based binder, it contains no added formaldehyde or phenol, is CFC and HCFC free, and has zero ozone depletion potential. Made with up to 80% recycled glass content, it is one of the more environmentally responsible loft insulation products available. Modern manufacturing means it is classed as low itch and more pleasant to handle, though gloves and basic protection remain sensible when working with any mineral wool. Rot proof, odourless and non-hygroscopic, it will not attract rodents or support the growth of mould, fungi or bacteria, and will last for the lifetime of the building.
For best results, install in line with the Knauf Loft Roll Installation Guide and the project specification, taking care not to block eaves ventilation. A full step-by-step walkthrough is available in the loft insulation guide Suitable for both new build and renovation work, it offers a straightforward route to improving loft thermal performance and reducing heat loss.
Benefits
- Thermal conductivity of 0.044 W/mK: reliable, effective thermal performance for loft applications
- Euroclass A1 non-combustible: the best possible reaction-to-fire classification, meaning the product does not burn
- Combi-cut format, partially perforated at 2 x 570mm and 3 x 380mm to suit standard joist centres
- 13.89m² coverage per roll, helping reduce joins and speed up installation
- Designed as the base layer between ceiling joists at 100mm depth
- Manufactured with ECOSE® Technology, a bio-based binder with no added formaldehyde or phenol
- Made with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential
- Rot proof, odourless and non-hygroscopic: will not attract vermin or support mould or fungi
- Lightweight, low-itch and easy to handle on site
- CCPI Verification Mark (certificate number 000600173/0627)
- BRE Green Guide rating A+
Good to know
- Thickness: 100mm; width: 2 x 570mm or 3 x 380mm; length: 12.18m; coverage: 13.89m² per roll
- Thermal resistance: 2.25 m²K/W; vapour resistivity: 5.00 MNs/g.m
- Packs per pallet: 24; pallet product code: 2404154
- 100mm plus 170mm gives 270mm total, the depth commonly used to meet loft U-value targets in England and Wales
- 100mm plus 2 x 200mm gives 500mm total, for a U-value of approximately 0.09 W/m²K where maximum performance is wanted
- Keep insulation clear of downlights and other heat-producing fixtures, using non-combustible covers where required
- Compliant with BS EN 13162:2012+A1:2015; manufactured to ISO 9001, ISO 14001, ISO 45001 and ISO 50001
- Store indoors, dry and flat; protect from prolonged sunlight and moisture
- Always refer to the Knauf Loft Roll Installation Guide before installation
