I was planning on putting foam board insulation on my basement walls before finishing. Then I realized that on the other side of the wall isn’t earth, but a poured foundation for my covered porch. Does the concrete provide enough insulation? Is there any point to adding foam board insulation to the interior of this wall?

basement wall

1 Answer 1


The concrete provides almost no insulating valve. Walls 3 feet below grade are usually figured as being about 55 degrees all year long. Above that 3 feet line they are usually considered to be outside exposed walls. When I finished my basement (near Pittsburgh, Pa.) I insulated all the walls with 1" styrofoam (pink board) and studs. It worked for me

  • Thank you! I am near PGH too coincidentally and I have been using 1-inch foam board on the other walls. I'll do the same here
    – Jack B
    Commented Dec 20, 2018 at 15:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.