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Old 02-17-2012, 10:54 PM   #31
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Is this joist combo sufficent?


Wow. I know next to nothing about floor prep for tiling, but I sure just learned something. It does make sense to me the way Jaz describes it. I never thought about it before, especially regarding the different plies in a sheet...but I can picture in my head what you're explaining about the second layer covering seams. In the future I'll be gutting my bathroom and doing a tile floor, and I know where to come for help!

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Old 02-18-2012, 11:00 AM   #32
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Is this joist combo sufficent?


I am grasping what you are saying Jaz
I'm not a flooring pro, I do capital maintenance for a living and I know what works and doesn't it take engineers to figure out load span with grain deflection you would never suggest to tile on ply anyway Jaz so this is really a pointless disagreement I do apologies for bringing it up but glad that the OP has more information to work with now.
It's some times better to see it both way
But seniority wins no offense Jaz.


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Old 02-18-2012, 11:16 AM   #33
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Is this joist combo sufficent?


OH Boy..........

Seniority? Most would instead say; experience - knowledge - & common sense.

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you would never suggest to tile on ply anyway Jaz so this is really a pointless disagreement
Absolutely not. The subfloor under the CBU or membrane is supported by the floor framing system and so it is imperative how it is constructed. We add underlayment mainly to add strength, may as well install them to gain their full advantage.

Jaz

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