sub floo for granite


Old 04-08-10, 10:03 PM
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sub floo for granite

Can someone advise me if I can lay 12" square granite tiles on the following 8'x10'sub floor.
The floor is solid cement it's framed with 2x3's every 12" placed on their sides running 8' long. (The floor was raised to allow for a drainage pipe) I have 3/4" plywood laid over the "Joists"
The tiles are from a big box store and appear to be only about 1/4" thick. Also what type of thinset should I use with granite?
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Old 04-08-10, 11:00 PM
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Hi Linda, Since you did say that you laid plywood down, you will need to use either hardibacker or cement board. I also recommend that you spread your thinset and then screw down the hardibacker, and since the granite is a 1/4 thick, make sure that you tape the joints. Use a good quality thinset with latex. If your tile is light I would recommend using a white base thinset. Good luck and hopefully the tile pro guys will pitch in!
Old 04-09-10, 11:04 AM
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You are gonna want at least a layer of 5/8" plywood on top of what you got now I believe and then a cement board or membrane.

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