Glass Mineral Wool - Knauf Insulation OmniFit® Slab 32

Knauf Insulation OmniFit® Slab 32


Light steel frame walls


Glass mineral wool


OmniFit® Slab 32 is a glass mineral wool slab, designed primarily for use as the inner leaf insulation between light steel frame studwork in a rainscreen façade system or in a steel frame construction with masonry outer leaf. It offers the best thermal conductivity of 0.032 W/mK in our range, combined with acoustic performance.

OmniFit® 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.
  • Manufactured size allows friction fitting between 600mm stud centres in light steel framing systems without any cutting and waste on-site. 
  • Designed to friction fit between studs, which prevents air movement and infiltration around the edges, minimising heat loss.
  • Compression packed with more product on a pallet than alternative rock mineral wool products.
  • Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants.
  • Features a range of sustainability credentials, including lower embodied carbon than alternative low density rock mineral wool products.

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) Euroclass Reaction to Fire Classification Quantity per pack Packs per pallet
90 1200 600 0.032 A1 6 24
100 1200 600 0.032 A1 6 24
120 1200 600 0.032 A1 5 24
140 1200 600 0.032 A1 4 24
150 1200 600 0.032 A1 4 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
Made in Britain Made in Britain
DECLARE 'Red List Free' DECLARE 'Red List Free'