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

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 ...

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 ...

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.