Crawl space insulation soaked by ground moisture
Why it happens here
Grove Creek sits in a riparian zone, so the soil stays wet longer and groundwater wicks into crawl spaces. Fiberglass batts act like a sponge, and once they are wet they lose R-value and become a mold risk. Homes closest to Grove Creek Trail see this first.
Our approach
We remove the wet material, install a sealed vapor barrier on the floor, and switch the walls to foam board that will not absorb water. We check the joists with a moisture meter before we close up.