The foundation walls of this crawl space show clear signs of moisture infiltration. Efflorescence is visible, meaning the stains on the foundation walls are from when water forced its way through the porous cinderblock walls, dragging the sediments and salts from within the blocks to the surface. If a CleanSpace vapor barrier and proper insulation were installed in this crawl space, they would help to mitigate outside air and moisture from impacting the crawl space.