Is there any problem with installing 2" polystyrene on both sides of a poured concrete basement wall.

Asked by gene somers
Presque Isle, WI

outside of wall is waterproofed. Inside is bare concrete. I had heard also that PL200 softens polystyrene, and that one has to use PL300 to attach boards to wall.


Answered by Peter Coates

Davis, CA

Davis Energy Group

December 18, 2011

Considering the waterproofing on the exterior surface there should not a be a problem other than using the appropriate adhesive. The application would basically mimic the ICF (Insulated Concrete Form) systems that are currently in use to a very large extent in the building industry. There may be a challenge in fastening a wallboard finish product to the poly styrene. One might consider furring strips depending on the application.

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