Amazingly, over 50% of your home's air comes from your crawlspace!
Depending on where you live, critters from snakes and rodents to spiders, bugs, and may have taken up residence in your crawlspace. Add a little water—or even a lot when flooding occurs—and mold and rot create indoor air quality (IAQ) problems and structural deterioration. Oh, and did I mention that soil gases like radon or methane can find their way into your house through the crawl space? Research has shown that whenever it’s warmer inside your house than outside, the buoyancy of the rising warm air in the house sucks air into your home from the crawlspace. In heating-dominated climates, 50% or more of the air you breathe in your home originated in your crawlspace. Definitely scary—and it’s dark down there.