The crawl space of this Washington, CT home had uncovered vents. These were designed to circulate air in the home and dry out the crawl space. We now know that this does not work, and vents only allow more humid air, musty odors, and mold spores to enter the home. To seal off this crawl space, we installed our CleanSpace vent covers. They are made of durable plastic that will not rust or rot, and they will seal the crawl space from outside air completely.