Energy · IECC 2021 §R402.2.4
Attic Access Hatch Insulation and Weatherstripping
Ceiling access hatch section: insulate to the surrounding R-value, plus the pull-down stair exception for zones 0 through 4 with its U-factor, R-value, opening area and weatherstripping limits.. Referenced to IECC 2021 §R402.2.4.
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