What is the best insulation for basement concrete walls?
The floor is gravel/stone and usually damp, even with windows open and dehumidifyer on. The walls do not sweat.. The humidity in summer is rarely below 80. I am in Northern VT and the temp now is 58 in the basement and humid 63. I have not seen any mold yet. Spray foam out - toxic. So are some rigid foam boards. Family very concerned. You mention a new type of friendly board. What can I use that is safe, R-20 at least ? Thank you.
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