day 31
I finished setting up the underlying structure of the waterfall and then cut the weir opening in the skippy. The liner in the pond wasn't quite long enough to reach the skippy, so I pulled a second piece of liner up to the skippy and put an accordion fold in it in front of the weir to prevent pulling where it will be attached. I glued the liner to the skippy using Sikaflex adhesive. It would probably be a good idea to use a more mechanical attachment method in addition to the gluing, such as Kent's (Koiphen.com - Pond retro "Charles" pond: post #65 and 66). Then I laid the large cement pieces and filled in a bit with smaller pieces. I chiseled some of the pieces so the visible straight sides would look more like natural stone rather than pieces of sidewalk. It's better to do this before the pieces are in place, but I had to do one after I placed it (used a piece of liner to catch shards, but some still flew out of bounds so had to pick them out of the pond - might have been easier to move to rock and chisel in the grass). Finally, I squirted Great Stuff expanding foam into cracks to prevent water from going behind the rocks and backfilled a bit on both sides of the waterfall with dirt.
