Homeowners often ask if a vapor barrier is necessary for optimizing attic insulation and protecting their homes from moisture-related damage. The answer, however, isn’t one-size-fits-all.
Carefully roll or lift fiberglass batt insulation, starting at one corner ... Adding excessive layers can compress the vapor barrier or block the ridge vents which can trap water vapor and ...
place a vapor barrier to prevent moisture issues, install the foam over that, and your choice of flooring over that.' Fiberglass batts are a popular, cost-effective choice for basement insulation.