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imoutohere t1_iycvv7j wrote

Reply to comment by windy496 in Plan to frame part of basement and have a few questions by Ad-Nauseam91

Okay air space? A gap? Void? Chose one. The point is you don’t want fiberglass insulation touching the concrete.

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windy496 t1_iydk71b wrote

Why?

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imoutohere t1_iydknt9 wrote

It's not recommended that you apply fiberglass insulation directly to a concrete wall. If you must use fiberglass, there needs to be a space between the insulation and the wall. If not, the place where the insulation touches the concrete will be overtaken by mold and mildew.

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