Crawl Space Repair - Fiberglass Insulation

The fiberglass insulation in this crawl space is sagging and falling to the dirt floor in large chunks. This is a major indication of excessive moisture within the crawl space. The fiberglass acts much like a sponge, absorbing the moisture in the crawl space air. This tells us that the relative humidity is too high and needs to be controlled. When the relative humidity becomes too high, the water droplets pull apart the fine glass fibers of the insulation, and the weight of all the excess moisture causes the fiberglass to become too heavy to sit in place between the floor joists.