spencerin
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# Posted: 17 Sep 2021 21:56 - Edited by: spencerin
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I added metal skirting to my cabin recently, and only after that was done (of course) did I learn that vapor barrier underneath is often advised. On the one hand, I have no ventilation under it, but on the other hand, the cabin is on a grade and on piers (no standing water) and in a wide open space (good sun and wind exposure). I also have a vapor barrier between the floor joists and subfloor (Reflectix) with the seams taped and no actual insulation (which would retain moisture).
Does a vapor barrier seem necessary here? Or more like something to do if I want to?
This question reminds me of my dad's place. It's on a cinderblock crawlspace with vents and a vapor barrier, but his cabin is in the middle of the woods and on flat land with fiberglass batt insulation underneath. I think those factors could be why it's always been humid under there. But even so, there's been no mold or other damage to the place over 50+ years beyond some disintegrating insulation.
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