Need suggestions on waterproofing slate panels on cmu.

[Shanawa]

Hello,
I don't have a lot of tile/stone work experience. I plan on building a pond/water feature this summer and am trying to find out a way to waterproof the cmu block wall that has a waterfall in it and still be able to support the weight of the slate and be fish friendly. I was going to originally carry the epdm liner all the way up but I don't think the slate will stay attached to it for long.

This is the the slate tile I am planning to use at this point: M. S. International Inc. Golden Honey Ledger Panel 6 in. x 24 in. Natural Slate Wall Tile ( It wouldn't let me post a link but it should come up in google.)

Here is a picture of my current design:



Would something like Kerdi work for me?

Thanks

[cwilde72]

Shan, I would consider a liquid waterproofing membrane for your application such as Laticrete Hydroban.

[Shanawa]

Thanks. That looks like what I need.

[cx]

Welcome, Shan.

Keep in mind that any tile industry direct bonded waterproofing membrane (ANSI A118.10) must be covered with a wear surface after application. I know of none that can be left exposed. And no, your water doesn't count.

Can't tell if you had in mind covering the entire pond surface or not.

My opinion; worth price charged.

[Shanawa]

The pond itself will be covered in a epdm liner from the captsones down ( The black space above the water). It was just from the capstone up is where I needed some waterproofing that the stone would adhere to and not fall down.