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Knauf Earthwool Loft Roll 40 Combi-Cut Insulation 11250x1140x100mm (12.83m2)

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For pitched roofs at ceiling level and suspended timber floors.


Earthwool Loft Roll 40 has a thermal conductivity of 0.040W/mK.

Earthwool Loft Roll 40 is classified as Euroclass A1 to BS EN 13501-1.


Earthwool Loft Roll 40 insulation is a flexible low density glass mineral wool quilt which is lightweight, resilient and non-combustible. The rolls are 1140mm wide and partially perforated to produce either 2 rolls 570mm wide or 3 rolls 380mm wide or available in ready-cut version (2x570mm only).


  • Lightweight and economic insulation quilt
  • Produced for use with timber joists at 400mm and 600mm centres
  • Partially cut perforations
  • Provides thermal, acoustic and fire performance


Earthwool Loft Roll 40 is primarily used for the thermal insulation of pitched roofs at ceiling level, it can also be used to thermally insulate floors. When used at ceiling level it is usually laid in two layers, with the first layer between the joists and the second layer over, and at right angles to the joists.

More Information
EAN 5012061816624
Manufacturer's Part Number 2404167
Brand Knauf Insulation
Length 11250mm
Width 1140mm
Thickness 100mm
Type Glass Mineral Wool
Thermal Conductivity 0.04
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