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Old 08-06-2011, 08:49 AM   #1
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Expansion of porcelain tile on bathroom backerboard flr and walls?


Hi, I have a 6' x 7' bathroom that I am remodeling. I have backerboard on the flr and also going up 42" on the walls. I am about to lay porcelain tile on the backerboard flr and walls.

Question: is there an expansion issue to consider? TI was surprised to hear the guy at the hardware store who said to leave 1/4" space between the flr tile and the wall for the porcelain tile expansion. I guess the wall tile might have the same issue, leave 1/4" between the bottom of the wall tile and the flr? That kind of does not make a lot of sense, that would leave a space between the wall and flr tiles. I would want to have them butted up against each other and grouted and or sealed at that 90 degree intersection.

Thanks for any insights!

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Old 08-06-2011, 09:55 AM   #2
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Expansion of porcelain tile on bathroom backerboard flr and walls?


you should have a flexible expansion joint where two different surfaces intersect. i dont think that you will need 1/4" in a room that small 1/8" should be good.

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Old 08-06-2011, 12:24 PM   #3
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Expansion of porcelain tile on bathroom backerboard flr and walls?


thx, will do that..

-D
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Old 08-06-2011, 12:55 PM   #4
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Expansion of porcelain tile on bathroom backerboard flr and walls?


You should not grout the connection between the wall the floor, use a siliconized acylic grout caulking, which can be purchased where you get your grout.

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Old 08-06-2011, 04:04 PM   #5
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Expansion of porcelain tile on bathroom backerboard flr and walls?


Thanks, will do that as well..

-Dave

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Old 08-08-2011, 10:12 PM   #6
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Expansion of porcelain tile on bathroom backerboard flr and walls?


Quote:
Originally Posted by dvarga View Post
Hi, I have a 6' x 7' bathroom that I am remodeling. I have backerboard on the flr and also going up 42" on the walls. I am about to lay porcelain tile on the backerboard flr and walls.

Question: is there an expansion issue to consider? TI was surprised to hear the guy at the hardware store who said to leave 1/4" space between the flr tile and the wall for the porcelain tile expansion. I guess the wall tile might have the same issue, leave 1/4" between the bottom of the wall tile and the flr? That kind of does not make a lot of sense, that would leave a space between the wall and flr tiles. I would want to have them butted up against each other and grouted and or sealed at that 90 degree intersection.

Thanks for any insights!
"Porcelain tile expansion" is a nonsensical phrase. It (tile expansion) does not exist.
I'd leave an 1/8" gap at the floor and caulk it.
Before you tile the floor, tell us about the floor support and cement board attachment.

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