Insulating concrete walls

Building Science.com contains many of the most recent advancements in building techniques. It even provides complete residential designs depending on which climate zone your house is located at.

My house is located in a mixed-humid climate, and one of the recommendations is to use foam insulation on bare concrete walls, with thickness of at least 1.5 inches (especially if this was not done on the outside of the house).

A money saving tip - using 2 layers of 3/4 inch foam is considerably cheaper than 1.5 inch foam. Apply foam such that no seams overlap. Use glue specifically for foamboard. On the final layer, tape seams with Tyvek tape.

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