Crawl Space Vent Insulation
In those days common building practice was to insulate the floor above the crawl space and to leave the crawl space s wall vents open so any moisture buildup would vent to the outside a.
Crawl space vent insulation. For this type of insulation system crawl space ventilation to the exterior is sealed off. Insulating your crawl space depends on the general climate in the area. An airtight insulated crawl space will make your house as a whole more energy efficient by keeper your floors warmer in cool months and thus reducing your heating bills.
However in subfreezing temperatures insulating the walls and sealing off the crawl space is most effective. All avenues to the outside are shut off or sealed with caulk.
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