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.

Features and benefits:

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

General information


1200 x 2400 mm

Uniclass 2015

Pr_25_71_97_12 Cement-bonded particleboardsPrimary


K11/145 Battened cement-bonded particleboard floating floor

K11/245 Cement bonded particleboard floating floor

K11/345 Cement-bonded particleboard flooring

K11/485 Wall sheathing

K11/585 Roof decking

K11/60 Board

K11/795 Wall lining on metal framing

K11/845 Cement-bonded particleboard

K11/890 Board

Specification data - Cement-bonded particleboards

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.

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/m·K.
  • Fire rating (BS 476-6 and -7): Class 0.
  • Fungus and termite attack: Highly resistant.
  • Durability (minimum): 30 years.

Product Options

Recommended fixings:

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