Foam board / Discussions

...foam board to the inside of the wall or leave a gap for air? I understand mold will not grow on the board but I am afraid that there are very small cracks in the mortar in-between some of the blocks and don't know if this will affect anything.. I found a tiny stream of light coming through only one block and had to sea...

...foam board and new siding. We need a cost effective solution to create a thermal and air barrier on our 1970s raised bungalow. We have a fully insulated (with spray foam) basement up to the rim joists. This space is now wonderful to live in.    However, at -40, we experience frost and freezing temperatures on the main ...