Specifies composition and physical requirements for cellulose cement corrugated sheets primarily for use as roofing and cladding. It also applies to autoclaved sheets where the cement is partially replaced by ground silica. Sheets may be finished with their natural colour, with colouring matter added to their composition or with adherent coatings. Appendices include a suggested procedure for verification of compliance, and methods of testing strength, watertightness and resistance to hot water soaking.