In this episode of HomePro, Judy and Layne discuss high relative humidity levels in the crawl space. What causes the problem, how it affects your home, and what are the solutions to keep RH levels under control?
Layne explains that every time the RH levels in a crawl space are above 50%, you have a big problem. One, that if not treated soon enough, can compromise the structural integrity of your home, decrease the value of your property, affect indoor air quality, the health of your family, and significantly increase the cost of home ownership.
Relative humidity levels above 50% in any environment are known to support mold growth. In the crawl space, the wooden structures alone provide enough organic matter for mold to feed on, leading to dry rot and structural decay. The moist, soft wood is also very attractive to termites, carpenter ants and other pests. Because the air in a building is always moving upwards, air from the crawl space is constantly being sucked into the living space, along with all the mold spores, allergens and pollutants found in the crawl space. At least 1/3 of the air you breathe is coming straight from under your home.
Layne explains the importance of controlling humidity in the crawl space and the steps you need to take to keep moisture under control. These steps include: providing adequate drainage to keep water from pooling in the ground, sealing the vents to keep outside air from carrying moisture into the crawl, isolating the entire space from the ground and outside air by encapsulating the crawl space, and finally conditioning the area with a good dehumidifier so mold won’t be able to survive and grow.
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