How to Install Extruded Polystyrene Foam For a Basement Wall

Extruded polystyrene foam panels simplify the process of finishing a basement wall. Rather than having to build a wooden frame wall and install it on the basement wall, you can apply these panels directly to the basement wall. Pound for pound they provide excellent insulation and effectively block moisture -- more so than standard roll insulation in a frame wall. You won't need many tools to get started on this job.

Tape measure
Utility knife
Construction adhesive
Furring strips
Drill
Masonry screws
Power screwdriver

Instructions

- 1
  Measure the height of the basement wall with a tape measure. You'll be checking to make sure your foam sheets will fit. If they're too long, score them with a utility knife and snap off the excess. If they're too short, you'll need to cut pieces from additional foam boards to add to the top.
- 2
  Place construction adhesive on the back of the first panel. Place it in the corner and push the panel firmly against the wall until it stays in place.
- 3
  Place the next panel so that it butts directly against the first panel, and continue until the wall is covered with foam panels.
- 4
  Place a furring strip vertically at the intersection of the first two panels. Drill holes in the furring strip and into the masonry behind it every 12 inches, starting a couple of inches up from the bottom.
- 5
  Insert screws into the holes and drive them into the masonry with a power screwdriver or drill with a screwdriver attachment.

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