While using dehumidifiers is one way to address excess moisture in the air, they don't fix the underlying issue, so if you're dealing with persistent high humidity, you may need to add a vapor barrier ...
One way to lower the humidity in your crawl space is by installing vapor barriers, a thick plastic sheet often made from polyethylene that blocks ground moisture. If you have a dirt-floored crawl ...
Otherwise, your home's crawl space could be affecting the interior's humidity as well. Essentially, any areas where moisture could come up from underneath can benefit from a vapor barrier.
A crawl space is a hollow, unfinished area beneath ... Instead of using spray foam insulation, opt for a polyurethane vapor barrier. Fully encapsulate the entire area, sealing off any air gaps ...
Once the old insulation is gone, inspect every inch of the attic space or ceiling crawl space for air leaks ... Adding excessive layers can compress the vapor barrier or block the ridge vents ...