ASTM WK67471

    Revision of C1063 - 19 Standard Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster

    (What is a Work Item?)

    Active Standard: C1063 - 21

    Developed by Subcommittee: C11.03 | Committee C11 | Contact Staff Manager



    WK67471


    Keywords

    control joint; expansion joint; lath; plaster; screed; suspended ceiling; walls;;

    Rationale

    C1063 Lath Fasteners Located Between Framing Members 1.The term, shall, is causing inspectors to interpret this statement as prohibited rather than avoided. In many cases, lathers are being required to remove any shiners and sometimes to seal the penetrations created. In other cases, removal is the only requirement which then leaves an open hole in the WRB, a water entry path. This ballot item addresses the negative impacts and consequences of this mis-interpretation. 2.The current language was never intended to prohibit lath fasteners located between framing members. It was intended to stop the practice of inspectors using their hands to define where and how many lath fasteners should be applied and because of the failure rate of over-fastened lathing in corrosive climates, due to reduced lathing embedment. 3.7.3.1.2 states lath fastening requirements applicable to all generic framing member types. Unexplainably, 7.3.3.1 repeats identical requirements as applicable to wood framing members, which are redundant with 7.3.1.2. This ballot item deletes 7.3.3.1 because of the redundancy with 7.3.1.2.

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    Work Item Status

    Date Initiated:
    03-14-2019

    Technical Contact:
    Jeff Bowlsby

    Status:
    Draft Under Development