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, that offers good thermal performance.

It is non-combustible insulation with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation's 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.
  • Ready-cut to allow quick and simple installation, maximising on-site efficiency when compared with alternative insulants.
  • Rolls are fully cut into 2x570mm and 3x380mm to suit commonly used timber stud spacing.



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 Facing Packs per pallet Quantity per pack
90 12500 1140 (2 x 570mm) 0.040 2.25 14.250 A1 Ready-cut Unfaced 24 2
140 8020 1140 (2 x 570mm) 0.040 3.50 9.140 A1 Ready-cut Unfaced 24 2

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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