Crawlspace Insulation: Interesting result thanks to mother nature: I had to put insulation directly on top of vapor barrier
We recently experienced light ‘flooding’ of my unfinished basement that I was in the middle of framing. In order to get items away from potential water damage, I moved 10+ rolls of unfaced batt insulation into my crawlspace (which is 3 feet above the height of the floor of my unfinished basement). Well to get the rolls in the crawlspace, I had to open the rolls and layout it out directly on the dry vapor barrier. I proceeded to take care of the water on the unfinished basement and left the insulation on the floor of the crawlspace.
A week later, I returned to pull out the insulation from the crawl space – and I was AMAZED! The crawlspace was noticeability warmer – to the point where I am wondering, why don’t I just leave it there on the floor?
Let me describe my crawlspace: I have a sealed conditioned crawled space with the follow layers from ground up to the subfloor:
-thick Vapor Barrier
-2 to 3′ crawl/air space
-unfaced R-19 batt insulation
-radiant barrier, radiant floor pipes
So if I am confident that I can keep water and pests out of the crawlspace, why wouldn’t I keep unfaced insulation on the ‘floor’ of the conditioned crawlspace? Again, it was an amazing improvement. Thoughts?
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