Water wicking

[Ronfire]

How high will water wick between two layers of liner. I will have 2 or 3 joints with waterfalls and wondering how to deal with water wicking.
Will 6" or 12" be enough or should I try some sealer between. Thought about some underlay between but I think that will be worse.

 

[Lisak1]

Underlay is definitely going to wick water, so I would avoid that.

I'm not sure what you mean by "2 or 3 joints" - do you mean areas where the waterfall liner meets the pond liner? In any case, your biggest issue is the liner coming down the falls - if you can overlap 12", you should be fine. Make sure the pond liner coming up the wall is securely in place at the top. And, as much as possible, avoid folds in the liner as I find those are where the water tends to travel.

 

[Ronfire]

I will have 2 or 3 water falls with an overlap. 12" should work.

 

[Lisak1]

Ah! gotcha! Is it possible to use one piece of liner for the whole waterfall and avoid the overlaps all together?

 

[Ronfire]

Not with my setup.I have 1 upper pond 7' around flows into a bog and then into another 7' pond. Check out the tread of my build under " Finally time to rebuild the pond"