The Dehumidifier That Finishes an Encapsulation Project

Crawl Space Dehumidifiers: how it works and when it's the right call.

Once a crawl space has been sealed with a vapor barrier and its vents have been closed, the space still holds some residual humidity from the soil, the framing, and the air trapped inside during installation. A dehumidifier pulls moisture out of that sealed air and either drains it through a condensate line or pumps it to a discharge point outside the crawl space. Epp Foundation Repair sizes the unit to the square footage and moisture load of the specific crawl space, since an undersized unit will run around the clock without keeping up. The dehumidifier only works as intended once the vapor barrier and vent sealing are in place. Installing a dehumidifier in an open, vented crawl space means it is fighting outdoor humidity continuously, which is a losing effort in the summer months across the Midwest. That is why Epp Foundation Repair treats the dehumidifier as the final piece of a complete crawl space encapsulation system rather than a stand-alone fix for a humid crawl space.