On Oct 2, 9:56*am, Greg wrote:
My street was cut from the side of a hill, so my back yard is level
for about 20 yards, then shoots up at about 30-45 degrees well into my
backyard neighbor's yard. I am putting a retaining wall into the slope
to have a pond, half walled by the retaining wall and half walled by
the rising slope of the ground.

My question relates to the flexible liner for the pond, and how to
connect the liner and the retaining wall. My working assumption is to
trim the edge of the liner so there is a little (2-3") lip that will
rest on the top of the retaining wall. The wall blocks are about 10"
deep, so I would have 8" of reatining wall top free and clear. I would
glue the underside of the liner to the top of the retaining wall, then
glue the retaining wall caps on top of that. The retaining wall blocks
and caps are concrete (Country Manor). Any problem with that idea? I
presume I can call the liner manufacturer when I buy it to find out
the appropriate adhesive to use on the liner-wall connection, and I
would use standard landscape adhesive on the retaining wall-cap
connection. Caps are 3" high, so the pond water level would be at
least 3" below the top of the caps. The liner would lay against the
sloping (up) ground and I would use large layered stone as the "cap"
on that side.

sound right?

Why glue it? I have a similar pond. The EPDM liner lays over the top
of the last course of blocks and is held down by the cap stones. If
you glue and the liner pulls as the pond settles you could tear the
liner.