Glass Mineral Wool - Knauf Insulation FrameTherm® Roll 40

Knauf Insulation FrameTherm® Roll 40


Timber frame walls, Pitched roofs at rafter level


Glass Mineral Wool


FrameTherm® Roll 40 is a glass mineral wool roll, designed for use in timber frame applications between studwork. It offers thermal conductivity of 0.040 W/mK.

It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique bio-based binder, ECOSE® Technology.


  • Designed to friction fit between timber studs, which prevents air movement and infiltration through or around the insulation, minimising heat loss.
  • Rolls are ready-cut into 2x570mm to suit commonly used timber stud spacing.
  • Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants.

For historical versions of product documentation, or documents relating to any discontinued products, please contact us with your requirements at [email protected].



Thickness (mm) Length (mm) Width (mm) Thermal Conductivity (W/mK) R-value (m²K/W) Area per roll (m²) Euroclass Reaction to Fire Classification Roll Type Quantity per pack Packs per pallet
90 12500 1140 (2 x 570mm) 0.040 2.25 14.250 A1 Ready-cut 2 24
140 8020 1140 (2 x 570mm) 0.040 3.50 9.140 A1 Ready-cut 2 24

Certification & Memberships

Eurofins Gold Eurofins Gold
Euroclass A1 Reaction to Fire Classification Euroclass A1 Reaction to Fire Classification
Green Guide Rating A+ Green Guide Rating A+
CE Marking CE Marking
EN 15804 EN 15804
Made in Britain Made in Britain
DECLARE 'Red List Free' DECLARE 'Red List Free'

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