On Jun 17, 11:12 am, wrote:
On Jun 17, 10:15 am, "Greg" wrote:

When I did mine I rolled on the foundation tar coating and while still wet
stuck 6 mil plasic up against it, that plastic is never going anywhere now.

One concern is the plastic may get brittle in a few years, no?
Whereas tar paper may not. Now granted, tar paper would not be water
"proof." It would just make it difficult to go through the wall and
encourage the water to go down to the perforated perimeter drain.

Plastic would not get brittle below grade. But if you want to
encourage the water to go down and into the drain tile, as another
poster is suggesting, you use a dimple membrane in addition to
dampproofing. http://www.systemplaton.com/. What this product
accomplishes is reduces hydrostatic pressure against the foundation.
Backfilling with sand accomplishes the same thing.