How to Remove Cured Foam Insulation

Spray foam insulation is widely used to fill gaps around homes. The super-expanding insulating foam comes in a can. The foam is dispensed in a semi-liquid state; as soon as it comes out of the nozzle, it expands rapidly and in just a moment hardens into a soft solid. Spray foam insulation sticks very well to most surfaces, including your fingers, and can prove to be difficult to remove. If you accidentally get this foam on a surface you do not want it on, there is a way to successfully remove it.

Step 1

Cut away as much of the sprayed, hardened foam as possible with a utility knife or hacksaw. Try to get it down to a thin residue over the surface without marring the surface.

Step 2

Scrub the remaining foam with a nonabrasive cleaner. Follow the directions for the specific cleaner to ensure proper use.

Step 3

Remove stubborn areas of cured foam using sandpaper. Start with fine grit and work your way up to coarser grit until you come to the finest grit that will successfully remove the foam.

Step 4

Brush any remaining loose residue from the surface and repaint as necessary to restore the surface to its previous condition.


Elizabeth Knoll

Elizabeth Knoll has been writing full-time since 2008. She has a deep love for gardening and has spent a vast amount of time researching that subject. Her work appears on various websites. Knoll received a certificate in Early Childhood Education from Moraine Park Technical College.