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Unread 04-22-2021, 04:06 PM   #4
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Join Date: Apr 2021
Posts: 2
I contacted product manufacturers, those who've set this particular stone in the past, as well as the quarry it comes from. Because we back-buttered with epoxy mortar, then added the sand as an aggragate for the modified thin-set to adhere to, we received an ok from everyone. We felt comfortable with this route.

There were a plethora of reasons we decided against epoxy mortar. Cost, and timeframe were of the main concern, as the previous installers left the job late in the game.

Thank you for the responses.
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