Our crew at Reed’s Sprayfoam Insulation firstly lined most of the ground of the crawl space with a 12 ml liner, treated with an antimicrobial finish that protects against mold and mildew growth on/under the liner. Secondly, the foundation walls were insulated with 2 inches of closed cell foam insulation which created an airtight seal to the liner. Lastly, the rim joists were lined with 4 inches of open cell foam, preventing any mold pores from escaping from the liner onto the rim joists.