We live in an older home that is raised a couple of feet off the ground with a crawlspace under it. In the past few years, the hardwood flooring in several rooms has started to warp and cup. What could be the problem?-Mary
It sounds like you may have excessive moisture and humidity in the crawlspace under your home. Here’s what you can do to correct it:
Make sure the ground around your foundation slopes away from the house (1/2″ per foot or more).
Divert rainwater run-off from the roof away from the foundation by installing gutters and extending the downspouts so water is diverted beyond the planting beds and out into the yard.
Check your air conditioner unit to be sure the AC drain pipe isn’t clogged and extend it if needed to direct condensation water away from the foundation of your home.
Inspect the crawlspace under your home. While the soil may be moist, it shouldn’t be saturated or have standing water.
Look for any plumbing leaks as well as excessive dampness, mold, and mildew.
If mold or mildew are present on the joists or bottom of the subfloor, treat under the house with a product such as Wet and Forget
Clean out any debris and stored items under your house, and fill in any holes or depressions.
Cover the entire crawlspace with thick, black plastic sheeting (6 mil or higher). Overlap the seams by a foot or more and run the plastic up the sides of the foundation.
For extreme moisture problems, consider taping the seams in the plastic together, block the outside vents, and install a dehumidifier in the crawlspace to remove excess moisture from the air.