![]() Moisture can enter a crawlspace from sources other than vapor from the ground. This task should be included in the contract for the appropriate trade depending on the workflow at the specific job site. This plastic covering will also help keep soil gases from entering the home. This plastic ground cover should be installed regardless of whether the crawlspace is vented or unvented. To prevent water or water vapor from entering the crawlspace, the crawlspace floor should be covered with a heavy polyethylene plastic capillary break that is sealed to the walls and piers to provide a continuous vapor barrier. Moisture can enter a crawlspace if it migrates into the soil beneath the crawlspace then enters the crawlspace as liquid water or water vapor from the soil, which can then condense on floor joists. Moisture in crawlspaces can cause harm to the home by promoting mold and rot along floor joists and rim joists. ![]()
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