Re: Vapor Barrier Sanity Check
If there is exposed soil in the crawlspace, that is where the vapor barrier should be installed -- on top of the soil. The crawlspace should be ventilated to the outside, and your floor should be insulated.
A fairly new concept is the "conditioned crawlspace." In this design, a vapor barrier is placed on the soil/ground of the crawlspace and a thin concrete slab (about 2") is poured on top of the vapor barrier. The foundation is sealed (no ventilation) and no insulation is placed in the floor. The crawlspace is provided with furnace supply and return vents to proved air circulation to prevent moisture buildup.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.