Glass Mineral Wool - Knauf Insulation FrameTherm® Slab 32

Knauf Insulation FrameTherm® Slab 32


Timber frame walls, Pitched roofs at rafter level


Glass Mineral Wool


FrameTherm® Slab 32 is a glass mineral wool slab, designed for use in timber frame applications between studwork. It offers the best thermal conductivity of 0.032 W/mK in our range.

FrameTherm® Slab 32 is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique bio-based binder, ECOSE® Technology.


  • Best thermal performance in our range.
  • Designed to friction fit between timber studs, which prevents air movement and infiltration through or around the insulation, minimising heat loss.
  • Slabs are manufactured in 1170x570mm 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) Euroclass Reaction to Fire Classification Quantity per pack Packs per pallet
140 1170 570 0.032 4.35 A1 4 16

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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