Historical
ASTM C1325-08b
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units
1.1 This specification covers non-asbestos fiber-mat reinforced cementitious backer units manufactured to be dimensionally stable and suitable as either an unfinished substrate (see Note 1) or as a substrate for decoration such as natural stone or tile on walls, floors, or decks in wet and dry areas. It is also suitable to be used as a substrate in the Application of Class PB Exterior Insulation Finish Systems (Practice C 1397 Note 1—When used as an unfinished substrate, consult the manufacturer's written installation literature for proper application details.
1.2 This specification is not applicable to asbestos-cement flat sheets (Specification C 220
1.3 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
ASTM International [astm]