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Expandable foam question
I wouldn't count on just the foam. It's supposedly something like 95%
water-blocking. My experience on a waterfall that cascades through three pools with about 8' of drop substantiates this. In my case, the foam directs MOST of the water over the falls, but not all of it. As far as what WILL work, I have no experience with this, but they make those fake-rock waterfalls waterproof using concrete (textured with a rock-like pad), then painted with waterproofing, then painted. Maybe you could bridge the gap that way. You'd still have a joint between concrete and rock though.You can't jack the flat rock up, and slip liner underneath? "grubber" wrote in message news How waterproof is that stuff? I'm putting in a stream and there are many wide flat limestone rocks that I would like to incorporate, while using EPDM liner for most of the stream. In particular, there is a rock about five feet in diameter, about 4 inches thick that has a nice overhang. I would like to dig the dirt back about a foot, lay liner back under the rock and foam the seam where liner meets rock so I can have the stream flow over the rock and fall to the pool below. Will the foam be good enough to waterproof the seam so I can have standing water there, or only enough to deflect splashing water with the water level lower than the edge of the liner? Is there a better way to do this? I know I can do the Gatorgard spray-in stuff, but that's on the pricey side of things. |
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