Finding my floor deflection rating...


Old 08-22-07, 03:34 PM
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Join Date: Aug 2007
Location: Beaverton, OR
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Finding my floor deflection rating...

I'm installing a new ceramic tile floor in a bathroom and here's what my current floor construction is: 4x4 piers supporting 4x8 beams every 4 feet, beams are spaced 4 feet on center, then 2x6 T&G decking. Currently the project is exposed to the wall studs and the decking.
I will use 1/4" Hardibacker so now I just need to decide how thick of plywood I should install over the 2x6 T&G decking. Hardibacker says floor deflection must not exceed L/360, so how do I find my floor deflection rating? I was hoping to use 3/8" plywood but can go 1/2" no problem.
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Old 08-22-07, 06:48 PM
Join Date: Oct 2004
Location: New Jersey
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Go see your vapor barrier thread.

For anyone else, it's in the Kitchen and bath forum of interior home improvements.

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