05:07AM | 01/12/04
Member Since: 12/27/03
6 lifetime posts
I need to update (replace) the insulation in my crawl space under my house. The crawlspace is maybe 20 inches tall, with solid ground as a bottom. Currently, the insulation is some type of craft paper, lined with what appears to be aluminum foil, stapled to the under-sides of the joists. It is original to the house, built in 1965, and in very many places it has been ripped down or has crumpled. There had also been a plastic sheet laid down on top of the ground, which I need to think about replacing. My questions are:
1. What type of insulation?
2. If I use fiberglass, do I use craft-faced or not? And if so, does the paper go up against the subfloor, or down?
3. I'm worried about moisture in the ground. Do I staple a moisture barrier to the bottom of the joists once the insulation is up?

Any input would be greatly appreciated!!!

plumber Tom

11:01AM | 01/16/04
Member Since: 05/10/03
801 lifetime posts
Don't staple any plastic to the bottoms of the joists. Use this vapor barrier (6 mil thick is sufficient) on the ground, where you have one already. Follow the insulation manufacturers guidlines as to R value. I would leave the paper facing down.


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