Reply by endgrainy

Good thought, thanks bigblockyeti. The insulation would be good for my long term plans of finishing off the room one day. I’m wondering if it would be bad though to seal on both sides of the metal pan decking – top sealed with epoxy over the concrete, bottom with spray foam – the worry being that rust would continue unseen and one day the rusted floor would give out.

However, I guess if there’s no oxygen and no new moisture then no further rust would occur.

And thanks for the grit recs.

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