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About This Item
Full Description
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), the Application of Direct-Applied Finish Systems (Practice C 1516), and the Application of Exterior Insulation Finish Systems Class PI (Practice C 1535).
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); non-asbestos fiber cement flat sheets for exterior applications such as claddings, facades, curtain walls, and soffits (Specification C 1186); gypsum backing board, coreboard, and shaftliner (Specification C 442); water-resistant gypsum backing board (Specification C 630); glass mat gypsum backing board (Specification C 1178); particle boards (Definitions D 1554); and discrete non-asbestos fiber cement interior substrate sheets (Specification C 1288).
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.
Document History
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ASTM C1325-22e1
Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units- Most Recent
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ASTM C1325-22
Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-21
Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-19
Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-18
Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-17a
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-17
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-14
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-08b
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-08a
viewing
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-08
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units- Historical Version
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ASTM C1325-04
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cement Substrate Sheets- Historical Version
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ASTM C1325-99
Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cement Interior Substrate Sheets- Historical Version