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Old 05-17-2012, 05:53 PM   #31
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OSB + Plywood = solid base for tiling?


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Originally Posted by Denisrus
Well, I know I can but those, but for such a big step in flooring height I would have to put two wax rings on top of each other. I used flange extension rings one day and they leaked, I dont know if I did something wrong. In my other bathroom the plumber used two wax rings but now I will go even higher.
Did anybody try to remove glued plywood (to OSB)? I am thinking now to rip it and put exterior grade 1/2", then I will not have that many issues.
You might be able to take the glued ply up with a roofing shovel once all screws are out.

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Old 05-17-2012, 07:41 PM   #32
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OSB + Plywood = solid base for tiling?


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I used flange extension rings one day and they leaked, I dont know if I did something wrong.
Well, apparently you did something wrong. Maybe you didn't caulk between the rings? There's a limit to how much you should raise it off the flange. You'd have to get some real long bolts. You may have to raise the flange itself.

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Old 05-18-2012, 03:39 PM   #33
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OSB + Plywood = solid base for tiling?


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I recommend Ditra though, so make sure you get both types of thin set. Ditra will save you a little over 1/8", so you will be at about 1 1/4" higher than the subfloor.
I decided to go with Ditra: easy to work with, less mess, and save 1/8" on the final floor height.
What is the best unmodified mortar? Do I have to mix into it anything else?
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Old 05-18-2012, 08:53 PM   #34
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OSB + Plywood = solid base for tiling?


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What is the best unmodified mortar? Do I have to mix into it anything else?
Lots of good ones around, but what brands & specific items can you get near you? You mix with water only. If you mix it with latex, it'l become modified.

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Old 05-18-2012, 10:39 PM   #35
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OSB + Plywood = solid base for tiling?


Not many, home depot carries two types and both grey, I think Lowes has way better option, I will get when I am ready for tiling. I have 1/16" step between two pieces of plywood, want to make them at the same level first and can't find my sander.
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Old 05-18-2012, 11:13 PM   #36
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OSB + Plywood = solid base for tiling?


HD Canada probably has Custom Blend and Premium Plus. Custom Blend, although meets min. specs, is not considered a quality unmodified. I think it's one notch above dirt, but HD wants a $6 bag of mortar. Custom Building Products Canada still makes Premium Plus which is a very decent unmodified mortar. (It's not available in the USA).

Lowes may carry Mapei or Laticrete brands. You tell me.

Not sure about the reference of the 1/16" & ply. If it's t&g and for some reason one side is 1/16" higher, it needs to be fixed. 1/32" is the max variation for ply differences.

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