Haw. Code R. § tit. 3, Building Code Council, State Energy Conservation Code, subch. 2, 9

Current through November, 2024

Above-grade walls

IECC Section C402.2.2 is amended to read as follows:

C402.2.2 Above Grade Walls. The minimum thermal resistance (R-value) of materials installed in the wall cavity between framing members and continuously on the walls shall be as specified in Table C402.1.3, based on framing type and construction materials used in the wall assembly.

Exceptions:

Continuous insulation for above grade walls and mass walls are not required when one of the following conditions are met:

1. Walls have a covering with a reflectance of = 0.64; or

2. Walls have overhangs with a projection factor equal to or greater than 0.3. The projection factor is the horizontal distance from the surface of the wall to the farthest most point of the overhang divided by the vertical distance from the first-floor level to the bottom most point of the overhang.

3. Concrete, CMU and similar mass walls are 6 inches or greater in thickness.

Haw. Code R. tit. 3, Building Code Council, State Energy Conservation Code, subch. 2, 9

[Eff 12/15/2020]