I’ve been doing a lot of reading about basement, both on this site and through the BSC articles. I am still a little unclear on basement damp-proofing.
I have a 1960s rambler, below-grade basement made out of cinder block walls. No major cracks. I’ve had no problem with the basement being wet after rain, but I do run a dehumidifier in the summer and I have heavy clay soil. I don’t have any mold issues.
I am in the middle of building a workshop room in an unfinished section. I have already insulated and sealed the rim joists with XPS and spray foam. What I was planning on doing for the walls was to use 2” of XPS, then build my 2×4 in front of it. No plans to use batt insulation. But I was unsure of was whether I need to damp-proof the cider block before I insulate it with XPS. Is that necessary, if I don’t have major water problems? Or is damp-proofing always a good idea?
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