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?
Best Answer
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