- 1). Clean the wall with soap and water to remove any dust. Scrub with a bristle brush, then let it dry out for at least two days.
- 2). Check for any fine cracks along the wall. Squeeze a bead of waterproof caulking along the crack. Smooth it flat with your finger. Seal cracks or gaps along the bottom and top of the wall as well.
- 3). Paint the wall with a water sealing concrete paint. Use a paintbrush instead of a roller. Concrete blocks are rough and a roller will not get down in the pores. Paint in long even strokes, but use the bristles to dab paint into spots that don't seem to be getting covered. Let the paint dry for one or two days depending on the wall location. More humid areas require more drying time.
- 4). Squirt construction adhesive on the back of insulation foam board. Make a zig zag pattern with the bead of glue to that there is a wide coverage. Let the glue dry on the board for at least three minutes before placing it on the wall. This lets the glue get tacky, which will help the boards stick.
- 5). Raise the foam insulation to the wall and press it to it. Hold it there for a couple minutes to allow it to set, then you can let go. Continue placing more insulation boards on the wall until it is covered.
- 6). Put each piece right next to the one before, leaving not gaps.
- 7). Cut the insulation if needed with a utility knife. Measure the space where the board needs to fit and transfer the measurements to the insulation board. Score the board with the utility knife, then snap off the unwanted part. If there is an outlet on the wall or vent opening, rub chalk on the item, then press a foam board in place where it should go. Remove the panel and look at the back. There should be a clear outline in chalk of the protrusion. Use the utility knife to cut out the hole.
- 8). Seal all seams as well as the top and bottom of the insulation with caulk. Squeeze the tube and run a bead along the seams and edges, then flatten it down with your finger.
SHARE
