I'll be pouring a basement slab shortly and am looking for a good source for vapor barrier material. I'd like to avoid regular polyethelene sheet (regardless of mill thickness) as I've seen too many 15 or 20 year old slabs come up with deteriorated sheet under them. Anyone have a good source? I'd prefer to just order it on line but can't seem to find a supplier.... Thanks

What material are you proposing to substitute for the poly sheeting?

Tu-Tu by Sto-Cote Products, Stego Wrap or SlabShield are some options.

One contractor I talked to said plastic vapor barriers for a slab-on-grade in Arizona are a waste of money. He pours his slabs directly on raw compacted earth.

You want something that meets ASTM E-1745 standards.

I used Americover 10 mil vapor barrier under my basement slab. I ordered mine online and had it delivered to work which has a loading dock.

http://www.americover.com/10_mil_vapor_barrier_761_prd1.htm

Right. I want to meet the ASTM 1745 - which garden variety 6 mil poly doesn't. The Americover looks good to me with a perm rating of 0.14 - pretty close to being a vapor barrier (<0.1) That should do it - thanks!

Check out http://www.barrett-inc.com/thebarrier.php

I did not see ASTM 1745, but it may comply and be something for you to add to your list of possibilities.

My interest is in the radon reduction.