Inside a crawl space, cover exposed foundation walls with 1-1/2 inches of rigid, moisture-proof insulation. Cover the floor and foundation walls with a plastic vapor barrier, and use a ...

‘A vapor barrier is essentially a shield made of heavy-duty plastic or foil that blocks moisture from seeping into areas like crawl spaces or walls. ‘Moisture might not seem like a big ...

Start with the crawl space. The floor should be covered with a vapor barrier material that will block the moisture flow from the ground floor. The vapor barrier film should cover the entire floor ...