ASTM WK70955

    New Guide for Standard Guide for Evaluation of Existing Steep Sloped Roof Assemblies for Changes to Thermal, Moisture, and Ventilation Performance

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    Developed by Subcommittee: E06.24 | Committee E06 | Contact Staff Manager



    WK70955

    1. Scope

    1.1 This guide addresses the evaluation of impacts to existing steep sloped roof assemblies resulting from addition of insulation or other alterations in the drying potential, ventilation, thermal or vapor resistance of the roof assembly or changes to the interior environment beneath the roof assembly. 1.2 This guide is intended to address the retrofit of existing, steep sloped roof assemblies which were originally constructed over naturally ventilated attic or unconditioned spaces.


    Keywords

    Continuous insulation, retrofit, moisture damage, hygrothermal analysis, slate roof, metal roof, shingled roof, attic space, energy code, steep sloped roof

    Rationale

    Energy conservation is being addressed more often on existing and/or historically significant buildings originally constructed with uninsulated and/or unconditioned attics and roofs. Without proper evaluation, changes to the thermal and moisture properties of the roof assemblies or changes to the conditioning of the space below the roof deck could have serious negative impacts, particularly on the integrity of the existing roof deck or structural support members and the potential for condensation and other moisture accumulation related issues. This standard seeks to provide guidance on how to properly evaluate such changes and alterations.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    12-09-2019

    Technical Contact:
    Rex Cyphers

    Item:
    001

    Ballot:
    E06.24 (20-01)

    Status:
    In Balloting