ASTM WK46047

    Revision of C1780 - 13 Standard Practice for Installation Methods for Adhered Manufactured Stone Masonry Veneer

    (What is a Work Item?)

    Active Standard: C1780 - 15

    Developed by Subcommittee: C15.05 | Committee C15 | Contact Staff Manager


    1. Rationale

    Cement boards complying with ASTM C1325, Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units are a suitable substrate for interior and exterior applications. ICC-ES Acceptance Criteria AC 51 for Precast Stone Veneer has been modified to include ASTM C 1325. ICC ES AC 59 on Direct Applied Exterior Finish Systems also allows cementitious backer units complying with C 1325. Cement boards have successfully been used in exterior applications for years and have demonstrated that they are a suitable alternative to metal lath and scratch coat.


    adhered; backing; cemetitious; masonry; mortar; unit; veneer;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Keith Poerschke


    C15 (14-02)

    Ballot Item Approved as C1780-2015 and Pending Publication