Loft insulation is insulation materials that are installed internally into the loft to improve the thermal conductivity of the residential or commercial building. The materials are frequently made up of high-performance, Earthwool or mineral wool slabs and other forms of insulation materials depending on the method of installation applied.

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Celotex 100mm PIR Insulation Board – GA4100 (2.4m x 1.2m)

£36.20 ex VAT

Knauf 100mm Loft Roll 44 – Combi Cut (13.89m2 Roll)

£24.10 ex VAT

ROCKWOOL Flexi – 1200 x 400 x 100mm – (2.88m2)

£719.77 ex VAT

ROCKWOOL Flexi Slab – 1200 x 600 x 100mm – (4.32m2)

£1,000.00 ex VAT

120mm Celotex Insulation Board – XR4120 (2.4m x 1.2m)

£46.50 ex VAT

50mm Celotex Insulation Board – GA4050 (2.4m x 1.2m)

£20.69 ex VAT

75mm Celotex Insulation Board – GA4075 (2.4m x 1.2m)

£30.96 ex VAT

Knauf 150mm Loft Roll 44 – Combi Cut (9.18m2 Roll)

£23.44 ex VAT

Knauf 170mm Loft Roll 44 – Combi Cut (8.01m2 Roll)

£25.91 ex VAT

ROCKWOOL Flexi Slab – 1200 x 600 x 140mm – (2.88m2)

£752.64 ex VAT

100mm Isover Spacesaver Loft Roll

£25.75 ex VAT

150mm Celotex Insulation Board – XR4150 (2.4m x 1.2m)

£57.25 ex VAT

70mm Celotex Insulation Board – GA4070 (2.4m x 1.2m)

£29.50 ex VAT

80mm Celotex Insulation Board – GA4080 (2.4m x 1.2m)

£34.33 ex VAT

Knauf 200mm Loft Roll 44 – Combi Cut (6.84m2 Roll)

£22.85 ex VAT

ROCKWOOL Flexi – 1200 x 400 x 140mm – (1.92m2)

£560.06 ex VAT

How is loft insulation installed?

Before installing loft insulation always consult a building professional to see what type of insulation you need and if the area is accessible and if the loft has any complications that can be affected by insulation such as ventilation systems, mould, or damaged joists. If insulation is installed in these conditions, it can cause further damage to the property.
If the area is no accessible or hard to reach, then a specialist should be called to install the insulation using specific tools.
Protective clothing should be used such as googles and face masks when using loft roll to avoid irritation. Long sleeves are also recommended as the loft roll material can be aggravating on the skin.
Loft insulation is installed by fitting loft roll in between the floor joists in the loft space.
Be sure the area is clear and electrical wires are avoided. The loft roll should be pushed firmly into the space on each side but not completely compressed as it can impact the thermal quality. A minimum depth of 270mm should be achieved when applying loft roll. When the roll comes to an end another roll should then be fitted and tightly butted with the end of the existing roll. – Ensure the rolls are fitted in the corners and harder to reach areas by pressing down with a long object such as a broom handle.
Loft insulation should achieve a U-value of 0.16W/mK.
When the loft roll has been fitted into every joist and all the spaces are the filled, clear the area of any loose bits of insulations to help achieve a neat finish. Another layer of loft roll should then be applied horizontally over the top of the joists and existing fitted loft roll.

Why do I need loft insulation?

Heat rises, which means heat can be lost through the roof. Loft insulation will prevent heat escaping through the roof. It keeps your property warmer in the winter and cooler in the summer. These components will make your living or working space a more comfortable environment and can result in lower monthly energy bills. Installing the correct insulation required for your building can also improve energy efficiency. Specific loft insulation materials can also be provided for moisture resistance to prevent mould or rot and other insulation materials can increase safety by improving fire resistance.

Building Regulations:
Relevant building regulations will need to be met when applying a new layer or replacing an existing layer of wall insulation. Installers will usually arrange this however it is your responsibility to assure you are complying with regulations.
The wall should achieve a U-value of no more than 0.3 W/m2K, if possible. The U-value is calculated by measuring how quickly heat will travel through the wall.

Knauf Loft Roll 44 Combi-Cut

Earthwool Loft Rolls are non-combustible, Glass Mineral Wool rolls. They are flexible, easy to cut, quick to install, and lightweight. They come in sizes 100mm, 150mm, 170mm and, 200mm, and are ready to fit in between joists of 400mm or 600mm centres. They have a thermal conductivity of 0.044W/mK.

Isover Spacesaver Loft Roll

Isover Spacesaver is a glass mineral wool that is strong, resilient, and flexible. They are now supplied in longer-length rolls to help speed up the insulation process and ensure more efficient deliveries and storage. They come in widths 386mm of 580mm and have thicknesses available between 100mm and 200m. they have a thermal conductivity of 0.044W/mK.