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 Knauf Insulation's 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.   
  • Friction fitting between studwork provides an optimum seal and prevents gaps which can otherwise lead to unwanted heat loss.       
  • Compression packed with more product on a pallet than alternative products.  
  • Exceeds acoustic requirements for Part E of Building Regulations.



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 Area Per Pack (M²) Packs per pallet Quantity per pack
100 6800 1200 (2x600 or 3x400) 0.040 2.50 8.16 A1 Combi-cut Unfaced 8.160 40 1
150 4550 1200 (2x600 or 3x400) 0.040 3.75 5.46 A1 Combi-cut Unfaced 5.460 40 1
200 3400 1200 (2x600 or 3x400) 0.040 5.00 4.08 A1 Combi-cut Unfaced 4.080 40 1

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

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