Can the pond have water in it when installing the liner? How mu

 It is always desirable to have a dry pond to install a liner in. In the real world, that doesn't always happen. Yes, we have installed many liners in ponds holding varying amounts of water. Generally speaking, it is not a big deal to span a liner over an area with up to a foot of standing water and leaving enough slack in the liner to settle into the water when the pond is filled. A bigger issue is having standing water in an area where you need to do welding. One can get pretty creative in avoiding this situation! When possible, try to position liner panels so this does not occur. If absolutely unavoidable, you will need to elevate the portion of liner to be welded so that it is dry. The liner should be as dry as possible when welding in order to achieve a proper weld.

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