INSULATION
As a general rule, avoid insulating the interior side of your basement walls.
It is best to leave breathing space for the concrete or block so moisture that
enters through the walls is not trapped. If your exterior basement walls
meet the definition of a dry wall however, adding some
interior insulation can increase the comfort level in your basement. If you
are building a stud wall for hanging wallcovering materials, you can
insulate between the studs with rigid foam—do not use fiberglass batts and
do not install a vapor barrier. If you are building a stud wall, it’s a good
idea to keep the wall away from the basement wall so there is an air
channel between the two.
