Related: How to Insulate Your Basement Rim Joists If you ... vapor retarders allow for some level of vapor permeability, whereas plastic vapor barriers are designed to be impermeable.

Like a traditional basement, dampness from the ground ... Cover the floor and foundation walls with a plastic vapor barrier, and use a dehumidifier to remove remaining moisture from the air.

Moisture related issues in a basement are ... tape a piece of plastic to the floor and leave it for 24-48 hours. If condensation forms under the plastic, water vapor is seeping through the ...

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.

The barrier typically comes in the form of sheets of plastic or foil-backed fiberglass insulation and is used during insulation installation to block vapor transmission. In many cases, vapor ...