Black plastic (I think 4mil) is the standard out here in the west. Goes right on top of the dirt and needs nothing to weigh it down, because it is protected from wind by the home. That vapor barrier is important. Put it down over the unused, shorter crawl space. How you are going to use the "useable" space will determine vapor barrier, walls, ceiling, etc.
So, what you gonna use it for?
- AppleNova is the best Mac-users forum on the internet. We are smart, educated, capable, and helpful. We are also loaded with smart-alecks! :)
- Blessed are the peacemakers, for they shall be called sons of God. (Mat 5:9)