ASTM WK72250

    Revision of C926 - 20 Standard Specification for Application of Portland Cement-Based Plaster

    (What is a Work Item?)

    Active Standard: C926 - 20b

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



    WK72250


    Keywords

    bond; brown coat; cementitious; exterior plaster; fog coat; portland cement; scratch coat; stucco;;

    Rationale

    Section X1.3 of ASTM C926 allows for acrylic finishes as an alternate to portland cement-based finish coats. The proposed change clarifies the constituents of the base coat and establishes the appropriate means to measure by the summation of the first and second coats. For example, should a user desire to use an acrylic finish as permitted by X1.3, the nominal thickness of the conventional portland cement-based stucco is really , not 7/8 because the portland cement-based finish coat should not be included in the stucco thickness.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    03-12-2020

    Technical Contact:
    Matthew Innocenzi

    Item:
    005

    Ballot:
    C11 (20-05)

    Status:
    Approval On Hold