Insulation, Partitions & Walls

Concrete foundation walls in finished rooms/areas shall be furred out and insulated with a minimum of R-8 insulation extending down to the basement floor slab on basement walls less than 50% above grade and a minimum of R-13 insulation on basement walls that are more than 50% above grade.

Exception: Basements having concrete foundation walls with less than 20% exposure above finished grade (based on height of wall times basement perimeter excluding unheated basement garages) may be uninsulated walls.

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