Wash the walls with a power washer and allow the walls to dry.
Spread the Styrofoam adhesive on the back of the first sheet.
Push the sheet firmly against the wall in the bottom corner, positioning it vertically.
Install the bottom row of sheets along the rest of the walls, using the same process. Measure and cut the sheets with a utility knife as needed.
Measure and cut sheets to fit the space between the top edge of the first row of sheets and the ceiling joists.
Apply the Styrofoam adhesive to the back of the first sheet, and place it on the block wall above the first Styrofoam sheets. Stagger the sheets in the second row so the seams don't line up with the sheets in the first row. Install the sheets until the walls are complete.
Cover the seams between the sheets with installation tape.