Do I Need a Vapor Retarder?

Vapor retarders are typically recommended for the interior side (i.e., the “warm in winter” side) of above-ground framed walls in your home, such as bedrooms, bathrooms, garages and attics. A vapor retarder is not required for basement walls, walls made of materials that can't be damaged by moisture or freezing, or any parts of walls that are below ground.