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 Knauf Insulation’s unique bio-based binder, ECOSE® Technology.


  • Best thermal performance in the range.
  • Manufactured size allows friction fitting between 600mm stud centres in light steel framing system without any cutting and waste on-site.
  • Friction fitting between studwork provides an optimum seal and prevents gaps which can otherwise lead to unwanted heat loss.
  • Features a range of sustainability credentials, including lower embodied carbon than alternative low density rock mineral wool products.
  • Exceeds acoustic requirements for Part E of Building Regulations.



Thickness (mm) Length (mm) Width (mm) Thermal Conductivity (W/mK) Euroclass Reaction to Fire Classification Area Per Pack (M²) Packs per pallet Quantity per pack Thermal resistance (m²K/W)
90 1200 600 0.032 A1 4.32 24 6 2.80
100 1200 600 0.032 A1 4.32 24 6 3.10
120 1200 600 0.032 A1 3.60 24 5 3.75
140 1200 600 0.032 A1 2.88 24 4 4.35
150 1200 600 0.032 A1 2.88 24 4 4.65

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
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