Spray foam insulation is a popular choice for many home and business owners as it is easy to apply, fills a space without creating pockets for drafts to sneak into and generally keeps energy costs low. However, from time to time you will need to gain access to the interior of a wall, be it a plumbing or an electrical issue. Once the wallboard has been removed, the insulation will be the next challenge. When this issue arises, the spray-foam insulation will need to be removed.
Locate the fuse box or circuit breaker box and turn off the power to the room. Scraping out the foam will be messy, so remove any furniture that is feasible to move and lay drop cloths over the rest of the furniture and floor.
Remove as much of the spray foam insulation as possible by hand while wearing protective rubber gloves. Begin the process by hand in order to locate and avoid damaging any wiring inside the wall.
Take a plastic putty knife and scrape in a downward motion to remove the foam that remains stuck in the wall. Use plastic in case of accidental contact with wires. If possible, push the knife down and behind the foam, allowing you to peel off thin layers in sheets.
Soak a clean rag in denatured alcohol. Wipe down the wall with the solvent to remove any remaining foam residue.