How to install a residential crawlspace vapor barrier; don't skimp on overlaps and edge sealing.

If a residential crawlspace isn't done right, you'll end up dealing with moisture, moldy odors, and warped flooring later on. On a previous project, we just laid the plastic film on the ground without sealing the edges; it looked fine during inspection, but once the rainy season hit, the moisture still seeped up. My on-site method is to first clear away sharp rocks and wood chips, and level the…