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Unread 10-25-2021, 02:48 PM   #1
Silentmdrummer
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Quartzite slab over tile

Looking for a bit of advice here. Doing my first shower and I tiled the top of the corner bench with a tile I now don’t care for. I have a quartzite piece I want to use instead but I’ve already installed the tile (tile is ceramic). The corner bench is a prefab kerdi bench so I’m not keen on trying to take the tile out as I think that will cause me more headache. The plan was to try and remove most of the finish from the tile and use laticrete 254 platinum the adhere the the quartzite piece. I know this isn’t ideal but I think this is better than the alternative. Am I way off here?
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Unread 10-25-2021, 02:50 PM   #2
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Welcome, Mike.

This is a glazed or an unglazed tile?
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Unread 10-25-2021, 03:08 PM   #3
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The tile is unglazed
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Unread 10-25-2021, 04:59 PM   #4
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I think you could just rough up the surface of the tiles a bit and bond your stone top directly to them with that 254.

Bonding a test piece to an extra tile, if possible, should tell you right quick whether that's the case.

Worst case, there are primers available from the thinset mortar manufacturers that would give you a greater certainty of bond.

I hope your bench top is properly sloped and I'd want as close to a 100 percent mortar coverage as you can achieve.

My opinion; worth price charged.
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Unread 10-25-2021, 05:13 PM   #5
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Thanks for the response. I probably have a test piece of tile but I don’t have a scrap piece of the quartzite. I think I’ll try the method you mentioned and make sure I get 100 percent coverage. The bench is already sloped so I should be good there. Here’s a picture of the new quartzite piece. Much better in my opinion.
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Unread 10-25-2021, 06:22 PM   #6
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Doesn't matter that you don't have extra quartzite, Mike. We know your mortar will adhere adequately to the clean stone, it's bonding to the face of the tile you're concerned with, if concerned at all. Bond a couple pieces of tile face to face and let it sit for week. Break them apart if able. Result will tell you all you need to know.

My opinion; worth price charged.
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