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Earthwool® Loft Roll 40 is a lightweight, flexible, resilient and non-combustible glass mineral wool roll installed between and over ceiling joists in pitched roof constructions. Earthwool® Loft Roll 40 is made with ECOSE® Technology, a no added formaldehyde binder derived from rapidly renewable materials instead of traditional petro-based chemicals used in other insulation products and is classified as Zero ODP and Zero GWP.

Related literature

The following content references this product:

Standard product features

Thermal conductivity:

0.040 W/mK.

Fire performance:

Euroclass A1 to BS EN 13501-1.


A+ generic BRE Green Guide rating.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-70/355 Mineral wool insulation

Product specification

An important note about specifying



Knauf Insulation Ltd


+44 (0)1744 766 666

Product reference

Earthwool® Loft Roll 40


[100 mm]
[150 mm]
[200 mm]

Roll width

[380 mm]
Three required to make up 1140 mm for 400 mm centres.
[570 mm]
Two required to make up 1140 mm for 600 mm centres.

Manufacturer details

Knauf Insulation,
Stafford Road,
St Helens,
Merseyside, WA10 3LZ
Tel +44 (0)1744 766 666
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