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I was wrong - R19 is only 6in. How deep is the bay? If the depth is 10in, then it would take R30 batts to fill all without compressing. I would like to know if there is a reason he is using R19 and sticking it to the top. It looks like it will sag and drop down.

This is not a crawl space, it looks like a lath and plaster ceiling, Some of the keys are still in place, but the plaster has been removed and probably replaced with sheet rock. What I don;t understand is the insulation. It looks like he put a very thin layer on top below the floor. How is it...