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roof ceiling construction

  1. jar546

    Roof Ceiling Construction Chapter 8 of the 2021 IRC Question

    Per Section R806.5 of the 2021 IRC, when a vapor retarder is installed on the ceiling side of unvented attic assemblies, what minimum requirement is stipulated regarding the air-impermeable insulation applied in direct contact with the underside of the structural roof sheathing?
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