Replies

1. 
   Robert Riversong | Oct 12, 2009 10:11pm | #1

   The thickness is irrelevant. What matters is that it is continuous and sealed at all laps, edges and penetrations, and that it is tough enough to withstand the abuse it will receive during the pouring of the slab.

   I use Tu-Tuff #4: 4 mil white highly puncture-resistant and tear resistant polyethylene made specifically for sub-slab applications, available in 9' and 12' wide rolls.

2. 
   Claire Anderson | Oct 12, 2009 10:50pm | #2

   Terrific, Robert. I'll see if I can find that locally. Do you use Gorilla Tape or something like it to seal seams, etc.?

3. 
   Claire Anderson | Oct 13, 2009 02:59pm | #3

   Robert: I'm not able to find this product locally. Do you order it online?

   Thanks,
   Claire

4. 
   Robert Riversong | Oct 13, 2009 07:40pm | #4

   I usually use the red 3M housewrap tape, which pulls off a tape dispenser more easily than Gorilla. The alternative to tape would be Tremco acoustical sealant.

   Both Tu-Tuff and Tremco are available from Energy Federation, which is one of my main suppliers for energy efficiency equipment and supplies. http://www.efi.org/ (they don't show Tu-Tuff or Tremco in their on-line consumer catalog, but they carry it in their commercial division)