June 18, 2007


Heat loss through uninsulated basement walls can account for up to one-third of the heat loss from an average home. Installing insulation on basement walls is often inexpensive, easy to accomplish and frequently combined with “finishing the basement.” Unfortunately, basement walls are often damp or are only dry on the surface because of evaporation of water into the basement air. Installing wood framing or fiberglass batts directly against basement walls subsequently leads to mold growth and decay of the wood due to fungal growth. Insulating basement walls can be safely accomplished by assessing the moisture conditions of these walls and applying some basic "building science" to the design process.