General requirements

07432 Panel Boards
074321 Plywood

Plywood shall be prime quality Kerero, mahogany or other approved material in the thickness specified in drawings and complying with the requirements of ES.C.D1.103.

Joinery plywood shall be selected for the face veneers being fit for smooth finish. Plywood veneers shall be free of joints, overlaps, open defects, depression, etc., on exposed faces. In the instance of joints on faces being unavoidable the plywood shall be selected for uniformity of grain character.
074322 Chipboard (Particle Board)

Chipboard shall be prime quality in the specified thickness complying with requirements of ES C.D.101. Chipboard shall be straight edge and free of visible defects that might impair strength and appearance. The exposed face of chipboard shall be smooth enough to receive further finish application.

074323 Block boards

Block board may be produced from plywood, chipboard or milled timber joined and glued together to form the core. The faces of the core shall be covered with veneer of thickness not less than 3mm glued to the core slab.

The exposed faces of block boards shall have selected surfaces for smooth finish. Block boards shall be free of any surface defects that might impair the appearance of the surfaces.
The edges of block boards shall be lipped in milled timber with the finished timber face width not less than 10mm.
074324 Hard & soft boards for ceiling work shall be in the specified thickness, selected for straight edges and consistency in surface grain.

The surfaces of hard & soft boards shall be smooth or uniformly textured to receive paint finish.

074325 Veneer lamination to core slab other than ordinary plywood used to achieve high standard finish shall be in the specified material glued to the core slab. Veneer for such lamination shall not exceed 2mm thickness and shall have uniform grain.

074326 Formica lining to core slab for the surfaces of counters exposed to moisture shall be of approved colour and not more than 4mm thickness.
074327 Asbestos cement sheet shall comply with the requirement of Specification 062432.