ASTM WK43399

    Revision of C926 - 12a Standard Specification for Application of Portland Cement-Based Plaster

    (What is a Work Item?)

    Active Standard: C926 - 14a

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



    WK43399

    1. Rationale

    The term exterior in the building code describes weather exposed surfaces. The term V-groove is not defined in C926 or C11, not common in contemporary plastering and therefore is not clear. What is clear is that this existing text requires exposed ends and edges of plaster panels, to be sealed against water entry. Exposed ends and edges of plaster panels are defined by casing beads, control joints, expansion joints and similar exposed trim components. This revised paragraph does not nor when revised suggest that stucco is waterproof, but the proposed revision merely provides clarification to the intent of the existing requirements.


    Keywords

    brown coat; cementitious; exterior plaster; fog coat—bond; portland cement; scratch coat; stucco;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    09-12-2013

    Technical Contact:
    Matthew Innocenzi

    Status:
    Draft Under Development