Is rigid foam insulation foam good on basement walls or does it trap moisture?
I'm planning to install and seal 2 inch eps foamboard to my basement foundation walls. From all of my reading it says that your basement foundation walls can only dry to the inside. If I put foamboard on the concrete and seal it everywhere, when moisture comes through the concrete it will have nowhere to go.
Perhaps I am missing something here but seems to me over time behind the eps will be wet as this moisture has nowhere to go?
I have also read attach it directly to the concrete with no air gap, lately I'm reading leave a tiny air gap. Looking for thoughts on these 2 options.