Suspended Floors over Crawlspaces

Materials/Tools Needed

  • Extruded polystyrene
  • Batt insulation
  • Spray polyurethane sealant (spray can or two-part)
  • 15 mil polyethylene sheet and sheathing tape
  • Tape or sealant compatible with polyethylene and concrete
  • Insulation retention system

Homeowner Tip

Protect the polyethylene sheet on the crawlspace floor with carpet or rubber mats if foot traffic is expected in the crawlspace.