Basement slab perimeter insulation
I was told that the updated code for Zone 5 required R-10 Foam for 2′ around the perimeter of my basement. Local code has not updated to the modern one that states this, but I would like to do this anyway. My question is…does this mean 2′ of foam going vertical against the footing, or 2′ of foam horizontal butted up against the footing that goes around the inside perimeter of the basement? I am trying to understand what the benefit of just 2′ does?
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A collection of one thousand construction details organized by climate and house part