Glass Mineral Wool - Knauf Insulation OmniFit® Roll 40

Knauf Insulation OmniFit® Roll 40


Multi-Application, Ground floors, Internal floors, Pitched roofs at ceiling level, Internal walls / partitions


Glass Mineral Wool


OmniFit® Roll 40 is a glass mineral wool roll, designed for use in multiple applications in both timber and steel frame construction. It offers thermal conductivity of 0.040 W/mK, combined with acoustic performance. 

OmniFit® Roll 40 is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique bio-based binder, ECOSE® Technology.


  • OmniFit® products come with a range of sustainability credentials, including lower embodied carbon than alternative low density rock mineral wool products.
  • Multi-purpose product that can be used to insulate a wide range of applications, reducing the need to purchase multiple products.        
  • Partially perforated rolls for use in either timber or steel frame applications at 400mm or 600mm centres.   
  • 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 products.  
  • 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
100 6800 1200 (2x600 or 3x400) 0.040 2.50 8.16 A1 Combi-cut 1 40
150 4550 1200 (2x600 or 3x400) 0.040 3.75 5.46 A1 Combi-cut 1 40
200 3400 1200 (2x600 or 3x400) 0.040 5.00 4.08 A1 Combi-cut 1 40

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

Product Videos