3.2 mm CH Building Board is strong and dense and offers high impact resistance. The board will not support mould growth, and resists insects and micro-organisms. It is a smooth, versatile board, and is ideal for the following applications:

Class O to BS 476: Parts 6 and 7: 1981

Class 1 surface spread of flame

Board size 3050 x 1218 mm Thickness 3.2 mm Density 1700 kg/m³ Weight 5.7 kg/m² Temperature range maximum 150°C

When 3.2 mm CH Building Board is used for exterior cladding that requires laminating, there must be a cavity behind the board to ensure adequate ventilation. An air gap of at least 20 mm is needed to remove the condensation created by internal heat build-up. The air gap must not be blocked at any point, and must be open to the air at both top and bottom.

The Cembrit 40 x 2.3 mm nail is ideal for timber studs, and the 35 x 4.2 mm countersunk cutting head screw for steel studs.

Fittings are easily attached to 3.2 mm CH Building Board. However, satisfactory results will depend on the weight of the object and the type of fastener used. The strength of 3.2 mm CH Building Board allows all kinds of attachments to be fastened. Heavy attachments should be centered on internal studwork. Alternatively, fastenings should be reinforced with a backing piece behind the board.

Contact the Cembrit Technical Support Department for advice and recommendations on specific applications.

For exterior applications requiring screw-fixing, pre-drilled holes 2mm larger than the screw size are required.

For a health and safety data leaflet concerning the Cembrit  product range, please contact the Cembrit  Technical Support Department at the address below.

Dust is minimised when the following tools are used: circular saw with dust cover and collector keyhole saw/jigsaw for cutting large holes universal saw for cutting small quantities hole saw for drilling holes for sockets hand-scriber with hard metal point carbide tipped masonry drill.

Face masks are recommended when there is no vacuum extractor or when large areas of boards are being cut.

For technical support and applications advice, you will always find your supplier anxious to help. If he has no instant answer to your query, you can easily access the technical knowledge of Cembrit’s own technical support staff to answer queries of a more fundamental nature and to advise on the suitability of particular products in specific applications.

Tel: 020 8301 8900
Fax: 020 8301 8901