QUESTION ABOUT PIECING A LINER.....

[Mmathis]

My hubby doesn't want to go the extra $$ to get a liner long enough for pond & waterfall. He says we can "piece" it together over the waterfall area & it will be OK. I've read enough on this forum to be leery of piecing, but wondering if you had the waterfall section overlap the pond section, is there a way to make this work?

We're just drying things out right now, and there hasn't been a chance to construct the falls area, so don't have exact measurements / dimensions or a design yet. But we need to order a liner soon, or we'll be spending the rest of our weekends sucking rain water out of our pond-hole.

 

[koiguy1969]

the best way would be to seam it together with the seam tape made for doing so. i did my first pond with a seam all the way across the pond 1/3 of the way in. never had an issue.

 

[Waterbug]

I like simple. If you seam and don't get it right you'll have a perfect gap for wicking water.

So I would only overlap. There is one trick, you want to create a gap between the 2 liners to stop wicking. If you go with caulk you have to let the bead caulk dry before putting the top liner down. Human nature is to want to "glue" them together, but that's the worst thing you could do. It is the gap that stops the water, not the bond.

 

[addy1]

due to the twists in my stream, like switch backs with ponds at each turn, the stream liner is pieced together. I started at the bottom, made sure the lower piece of liner came up high enough under the upper piece of liner that no water would flow that far up hill to leak out. A lot of the pieces have no tape, glue etc putting them together, just gravity. No leaks. The only leak I had was one of the small ponds, filled higher than I expected on the down hill side, so had to build up one edge. Anywhere I could not bring the lower liner up high enough, I did the double sided tape between the liners and single sided tape over the liner edges. It all worked fine for me.

 

[Mmathis]

Thanks! That seems simple enough and the reasoning is sound. After thinking about the way we've planned it, the waterfall is going to be a little off-center and not directly in-line with the length of the pond, so it would be almost impossible to have one continuous piece of liner.

 

[Mmathis]

Waterbug (I hit "post" before I was through...), about the spacer? How big (long, wide, etc.) are you talking about? Looks like just to keep the 2 pieces of liner from touching, right? Do you have to adhere the spacer to anything?

 

[addy1]

I have never used a spacer, but it is an interesting idea. So far no need to use one.

 

[noobfisher]

When i seamed my liner all i used was p&l roofing caulk. The seam is about 6inches under water at all times i have never lost water in my pond. I overlapped the sections slathered some on and pushed them together gave 1 day to dry and voila watertight. Easy and simple.

 

[addy1]

That stuff does work well