Should a vapor barrier be put under a house?
On One Hand: Install a Vapor BarrierWater vapor evaporating from the soil and condensing on a house can lead to water damage and mold buildup. As such, you should install a vapor barrier beneath your house in most U.S. climates. Vapor barriers and vapor diffusion retarders can significantly reduce the amount of water vapor that reaches your house from the soil.On the Other: Not in All ClimatesA vapor barrier can be difficult and expensive to install, so you should probably omit it if you live in a drier climate. If you live in a location with arid, desert-like weather or an area with warmer temperatures, you need not install a vapor barrier.Bottom LineUnless your home is located in a drier, warmer climate, you should install a vapor barrier beneath the house.
