Foundation vents are openings that allow air to passively move in and out through your crawl space. Vent covers are placed ...

Q. My house has four crawl space foundation vents that have flaps that can be opened or closed. The furnace people said to keep the vents closed all the time to prevent condensation from forming ...

Q-We have a crawl space under our house that we use for occasional storage. A number of vents were installed that go through the foundation to allow cross ventilation in this crawl space. We were t… ...

ADEAR CHAD: Closing subarea vents is a widespread problem. It misses the entire purpose of ventilating the crawl space. Winter is when ground moisture most commonly occurs under a building.

I insulated the crawl space under the newer part of my kitchen a couple of years back, and it seems to me to have made a bit of difference in temperature control in both summer and winter. As the ...

Q: My dad tells me I should cover my crawlspace vents when the temperature drops below 25 degrees. My concern in so doing is that we might be inviting problems.

The International Building Code requires vented crawlspaces to have one square foot of ventilation per 150 square feet of crawl space area to obtain a 1/150 net free ventilation area, or NFVA.