Home > Companies > Knauf Insulation Ltd > Earthwool® OmnifFit Slab 400 mm

Multi-purpose, non-combustible, glass mineral wool slab. Specifically designed for installation by friction fitting.

Features and benefits:

  • Provides thermal and acoustic performance.
  • Flexible and robust.
  • Manufactured with ECOSE® technology, an innovative, bio-based binder that helps make the product soft and easy to handle.
  • 'A+' generic BRE Green Guide rating.


Suitable for the thermal and acoustic insulation of a variety of constructions, including:

  • Rafters.
  • Timber frame walls.
  • Steel frame walls.
  • Internal partitions.
  • Internal floors.
  • Separating floors.
  • Ground floors.

Standard product features

Size (l x w):

1200 x 400 mm.


  • Thermal conductivity (K-value): 0.035 W/mK.
  • Fire resistance (to BS EN 13501-1): Euroclass A1.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-70/355 Mineral wool insulation

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Knauf Insulation Ltd


+44 (0)1744 766 666

Product reference

Earthwool® OmnifFit Slab 400 mm


[50 mm]
[100 mm]
[140 mm]

Manufacturer details

Knauf Insulation,
Stafford Road,
St Helens,
Merseyside, WA10 3LZ
Tel +44 (0)1744 766 666
NBS Plus