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We live in the SF Bay Area where it never freezes and, basically, has a year around temperature range of 36 to 80 degrees. I’m looking to install insulation under my floor that’s over an vented, enclosed crawl space. There is currently almost no insulation in the walls and floors and no vapor barrier anywhere.
Does this new floor insulation require a vapor barrier? And, if so, which way should it face — up toward the floor or down toward the exposed dirt in the crawl space. I could see arguments for either strategy or even no vapor barrier at all. I was considering just installing some unfaced Corning Miraflex an calling it a day.
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We live in the SF Bay Area where it never freezes and, basically, has a year around temperature range of 36 to 80 degrees. I'm looking to install insulation under my floor that's over an vented, enclosed crawl space. There is currently almost no insulation in the walls and floors and no vapor barrier anywhere.
Does this new floor insulation require a vapor barrier? And, if so, which way should it face -- up toward the floor or down toward the exposed dirt in the crawl space. I could see arguments for either strategy or even no vapor barrier at all. I was considering just installing some unfaced Corning Miraflex an calling it a day.