When winter rolls around, close or cover foundation vents. We explain how to seal up crawl-space vents in winter for a more energy-efficient home.

Q: I am planning to build a new home on a crawl space foundation. I’ve been hearing a lot lately that conditioned crawlspaces — as opposed to vented crawlspaces — are the way to go. Are they? A: Here ...

Q: I’m building a crawl space foundation for a small add-on to my home and was told I’d have to ventilate it. Since it is mostly dirt and concrete, is venting it really that important? What are my ...