Homeowners often ask if a vapor barrier is necessary for optimizing attic insulation and protecting their homes from moisture ...

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.

above eaves). This can be reduced to 1/300 if a vapor barrier is on warm side of attic insulation. Under-floor crawl space should have a net free vent area of 1 SF for each 150 SF of crawl space (or 1 ...

Adding blown-in insulation to your attic space is a popular way to improve ... Adding excessive layers can compress the vapor barrier or block the ridge vents which can trap water vapor and ...