Here's what you do.

Place the liner.

Spray the foam onto the liner and then place the rock over the foam. It
won't be 100%, but pretty close. The foam works better this way than trying
to lay a "bead" of it afterwards.

FYI, This past weekend I reworked my stream a bit and tried the cheap stuff
from the home depot rather than the black stuff hawked by the pond industry.
Worked like a charm. Kind of ugly though. But others on this list seem
assured it will turn a less offensive color soon (If not I can always go
back to the black stuff later)

Joe


On 3/15/04 3:23 PM, "grubber" wrote:

How waterproof is that stuff? I'm putting in a stream and there are many
wide flat limestone rocks that I would like to incorporate, while using EPDM
liner for most of the stream. In particular, there is a rock about five
feet in diameter, about 4 inches thick that has a nice overhang. I would
like to dig the dirt back about a foot, lay liner back under the rock and
foam the seam where liner meets rock so I can have the stream flow over the
rock and fall to the pool below.

Will the foam be good enough to waterproof the seam so I can have standing
water there, or only enough to deflect splashing water with the water level
lower than the edge of the liner? Is there a better way to do this? I know
I can do the Gatorgard spray-in stuff, but that's on the pricey side of
things.



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