Standing water in the crawl space. No insulation on water pipes. Crawl Space Moisture Barrier Placement Guide Crawlspace Crawl Space Insulation Foundation Repair In this instance we focused on foil faced r-13 insulation on. How to insulate crawl space floor . With Kraft-faced insulation the facing is generally against the subfloor. Pairing SilverGlo with our TerraBlock padded floor insulation will keep out all outdoor air so your crawl space can stay warm in the winter and cool in the summer. This may be done before or after the subfloor has been installed. In a vented crawl space the underfloor should be insulated similar to how it is in ceilings. Gaps between sub floor and insulation. Fiberglass insulation on the floor joists in a crawl space will help keep the floor above warm. JM ComfortTherm Kraft-faced and unfaced insulation are all possible products to use for this application. In this video home renovation brothers Dave and Rich demonstrate how to insulate...