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Make your home warmer for longer with our extensive and professional range of insulation. From loft and roof insulation to cavity wall and pipe insulation, rest assured that we can provide heat protection to every inch of your home. Insulation is an integral aspect of contemporary building and construction. Ensuring a property has insulation will provide heating efficiency in colder months, while maintaining cooler temperatures when it's warmer. To insulate a home or commercial property, we have a range of energy-saving solutions for you. We have a choice of PIR (polyisocyanurate), rigid insulation board for wall and floor insulation. You can also choose from our range of effective cavity wall insulation, which doesn't just help to reduce heating bills, but can keep noise levels from neighbours and traffic down, with specially made acoustic insulation. To really keep energy bills low, we have loft insulation in the form of boards and rolls, available in a range of sizes, thicknesses and materials. Reduce heat loss with energy saving insulation, and accessories for fitting and installing, available to order now.

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An A1 Non-Combustible Glass Mineral Wool slab, manufactured using Knauf Insulation's unique ECOSE® Technology, and is specifically designed for use as full fill insulation in masonry cavity walls. It has very high levels of thermal resistance allowing compliance with the relevant Building Regulations.
Depth
125 mm
Length
1200 mm
Thickness
125 mm
Width
455 mm
Material
Glass Mineral Wool
Acoustic
Yes
Fire Retardant
Y
Thermal Conductivity
0.032 W/mK
Usage
For thermal insulation in residential and non-residential masonry cavity external walls
Coverage
2.18 m2
Type
Cavity Slab
Range Description
Cavity Insulation Slab
Brand Name
Knauf Insulation
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£29.27
each (Inc. VAT)
+
125 mm
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Celotex CW4000 is a high performance insulation board featuring low emissivity foil facings, and offers enhanced thermal performance as cavity wall insulation when compared to typical PIR products. Celotex CW4000’s enhanced features deliver thinner solutions that meet target U-values as required by Building Regulations including Part L and BREEAM.
Brand Name
Celotex
Range Description
Insulation Board
Manufacturer Model No
CW4075
Made To Order
N
Dimension 3
75.0
Dimension 1
1200.0
Dimension 2
450.0
Length
1200 mm
Thickness
75 mm
Width
450 mm
Material
PIR
Usage
Cavity Board
Coverage
4.32 m2
Fire Retardant
Y
Thermal Conductivity
0.022 W/mK
Certifications Met
Bba Certificate Number 94/3080
Type
Insulation Boards
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£21.05
per sheet (Inc. VAT)
+
75 mm
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NEW
Celotex CW4000 is a high performance insulation board featuring low emissivity foil facings, and offers enhanced thermal performance as cavity wall insulation when compared to typical PIR products. Celotex CW4000’s enhanced features deliver thinner solutions that meet target U-values as required by Building Regulations including Part L and BREEAM.
Range Description
Insulation Board
Brand Name
Celotex
Manufacturer Model No
CW4000
Dimension 3
100.0
Dimension 2
450.0
Dimension 1
1200.0
Length
1200 mm
Thickness
100 mm
Width
450 mm
Material
PIR
Usage
Cavity Board
Coverage
3.24 m2
Fire Retardant
N
Thermal Conductivity
0.022 W/mK
Certifications Met
Bba Certificate Number 94/3080
Type
Insulation Boards
Show More
£26.64
per sheet (Inc. VAT)
+
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This multi-purpose insulation board is suitable for a number of applications including roof, wall and floor systems. Featuring foil facings, this board is manufactured from tough polyisocyanurate, with an ideal mix of blowing agents acquiring zero ozone depletion potential and a low global warming impact.
Range Description
Insulation Board
Brand Name
Celotex
Manufacturer Model No
XR4000
Made To Order
N
Length
2400 mm
Thickness
120 mm
Width
1200 mm
Material
PIR
Usage
Suspended Floor, Solid Floor, Partition Wall, Roof
Coverage
28.8 m2
Fire Retardant
N
Thermal Conductivity
0.022 W/mK
Type
Insulation Boards
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£103.04
per sheet (Inc. VAT)
+
120 mm
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Knauf Insulation DriTherm 32 Cavity Insulation Slab 125mm 1200mm x 455mm
Knauf Insulation DriTherm 32 Cavity Insulation Slab 125mm 1200mm x 455mm
An A1 Non-Combustible Glass Mineral Wool slab, manufactured using Knauf Insulation's unique ECOSE® Technology, and is specifically designed for use as full fill insulation in masonry cavity walls. It has very high levels of thermal resistance allowing compliance with the relevant Building Regulations.
Show More
£29.27 each (Inc. VAT)
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Celotex CW4075 Cavity Insulation Wall Board 75mm x 450mm x 1200mm (0.54m²/Sheet)
Celotex CW4075 Cavity Insulation Wall Board 75mm x 450mm x 1200mm (0.54m²/Sheet)
Celotex CW4000 is a high performance insulation board featuring low emissivity foil facings, and offers enhanced thermal performance as cavity wall insulation when compared to typical PIR products. Celotex CW4000’s enhanced features deliver thinner solutions that meet target U-values as required by Building Regulations including Part L and BREEAM.
Show More
£21.05 per sheet (Inc. VAT)
Quick view
Celotex CW4100 Cavity Insulation Board 100mm x 450mm x 1200mm (0.54m²/Sheet)
NEW
Celotex CW4100 Cavity Insulation Board 100mm x 450mm x 1200mm (0.54m²/Sheet)
Celotex CW4000 is a high performance insulation board featuring low emissivity foil facings, and offers enhanced thermal performance as cavity wall insulation when compared to typical PIR products. Celotex CW4000’s enhanced features deliver thinner solutions that meet target U-values as required by Building Regulations including Part L and BREEAM.
Show More
£26.64 per sheet (Inc. VAT)
Quick view
Celotex XR4120 General Application Insulation Board 120mm x 1200mm x 2400mm (2.88m²/Sheet)
Celotex XR4120 General Application Insulation Board 120mm x 1200mm x 2400mm (2.88m²/Sheet)
This multi-purpose insulation board is suitable for a number of applications including roof, wall and floor systems. Featuring foil facings, this board is manufactured from tough polyisocyanurate, with an ideal mix of blowing agents acquiring zero ozone depletion potential and a low global warming impact.
Show More
£103.04 per sheet (Inc. VAT)
Quick view