Spray foam insulation particularly closed cell will provide an effective barrier against humid air between the home’s subfloor surface and the ground. Furthermore, it is able to prevent the upward movement of the moist air further into the attic, which could potentially lead to more trouble.
Low-energy structures and buildings located in very cold climate areas should be insulated using spray foam insulation below the ground cover. Once the slab is applied above ground, the temperature and humidity in the house become much more bearable. In addition, an air barrier is created that protects the rim joists from adversities in the summer and winter.
Since the insulation in the crawl spaces should be non-water sensitive, spray foam insulation is the ideal choice because of its water resistance qualities. The foam insulation layer is vapor impermeable, and is therefore very ideal in keeping the interior walls dry and home conditions perfect, especially because rim joists are always cold regardless of the season. Other disadvantages of insulation that may be visible in other insulation types are overcome by spray foam, and your crawl space is guaranteed to be dry and in a healthy state.