Q: My house is built on a crawl space, like most of the houses in my area. Only part of the dirt floor of the space is covered with plastic. Do I need this plastic cover, and if so, what thickness do ...

Q: Since the summer of 2006 I have lived in a 1943 cape with cement floor in the basement. During the summer the 3-year-old wood flooring curls up from the moisture that seeps through the floor. The ...

Years ago, when few homes had insulation in their outside walls, no one worried about vapor barriers–there was no need for them. But now homes are better insulated, making it necessary to install a ...

Q: I would appreciate your opinion on whether I should hire a company to line the crawl space of my house. It's about 2,400 square feet, and I suspect the work would be pretty pricey. Is it worth it?

The placement of a water vapor retarder directly below concrete floor slabs on the ground has become common practice for buildings where floor coverings or coatings are to be installed. Such use has ...