May be unnecessary if ventilation is adequate. Related: How to Insulate Your Basement Rim Joists If you’re unsure about adding a vapor barrier, enhancing attic ventilation might be a more ...

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.

Applying a sealant can block some of this moisture and even prevent minor leaks or water vapor from rising into the space. This can reduce humidity levels and protect the basement from small ...