Wednesday, March 24, 2010

flagstone in a pool

    What is the formula to make the thinset, to lay flagstone underwater? I am trying to lay flagstone on the bottom and the walls of my underground pool. I would like to mix 1/2 sack of masonary cement and 16 shovels of sand. I would like to know what to mix with it to hold under water to withstand freeze and thaw.
Thank you very much, Wade Gee

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