Rigid, medium density, high performance wood/ cement particle bonded building board which combines the strength and durability of a concrete product with the workability of timber.

An excellent sheathing and acoustic building board. Can be used as an outer sheathing board onto metal or timber frame structures, behind the outer cladding finish. They are manufactured from chemically treated rubber wood chips mixed with Portland cement.

Fully tested to BS EN 634-1 and BS EN 434 2 and meets the correct pullout and performance levels to carry EWI and rainscreen systems. Conforms to BS EN 13986, BS EN 89/106/EC and BS EN 594.

Material available with BM Trada FSC Chain of Custody. CE marked.

Key applications:

  • Sheathing board on metal and timber frame.
  • Acoustic roofing and flooring.
  • High impact partitioning.
  • Shuttering.
  • OEM Application where improved strengths and density are required.


  • Provides excellent acoustic properties.
  • Good water repellence properties.
  • Improved fire performance over timber products.
  • High impact resistance.
  • Formaldehyde free.

Standard product features


1200 x 2400 mm.


Light Grey.


  • Smooth front and back face.
  • Nominal density: 1250–1300 kg/m³.
  • Bending strength (Modulus of Rupture): 9.0 Mpa.
  • Modulus of Elasticity (MoE): 4.5 Mpa.
  • Thermal conductivity: 0.26 W/mk.
  • Fire rating (BS 476-6 and -7): Class 0.
  • Fungus and termite attack: Highly resistant.
  • Durability (minimum): 30 years.


Recommended fixings:

4.8 x 38 mm wing tip self-drilling fixing, 15 mm from edge.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-95/410 Cement-bonded particleboard

Product specification

An important note about specifying



RCM - Roofing and Cladding Materials Ltd


+44 (0)800 6124662

Product reference



[8 mm]
29 dB sound insulation.
[10 mm]
31 dB sound insulation.
[12 mm]
32 dB sound insulation.
[16 mm]
33 dB sound insulation.
[18 mm]
33 dB sound insulation.
[20 mm]
33 dB sound insulation.
[24 mm]
35 dB sound insulation.


[RCM Foil Tape]
Waterproofing seal.
[RCM Intusil]
Neutral cure sealant for use in gaps and joints.
[RCM Joint Seal]
Air tightness seal.

Manufacturer details

Units 25-26 Rosevale Road,
Parkhouse Industrial Estate West,
Staffordshire, ST5 7EF
Tel +44 (0)800 6124662
Fax +44 (0)845 1303726
NBS Plus
NBS National BIM Library