As humidity builds in the crawlspace it creates an ideal space for mold and wood rot to grow. All wood and wood products in the crawlspace can be damaged including wooden floor boards, girder beams, floor joists, stored products, etc. If left un-addressed, the crawlspace space will begin to have sagging floors, creating uneven flooring, In some extreme cases, the floor may even cave in. Many pests, such as subterranean termites, carpenter ants, lyctid and powder post beetles, etc. look for extremely moist wood to feed on. Wood is treated with a liquid borate to help control wood decay fungi, wood boring beetles, and other insects.

Phillips provides Thermostatic vents to be installed in the foundation blocks in the crawlspace to help elevate the moisture problems. A vapor barrier installed on the floor and walls also helps to improve the humidity.