Finding my floor deflection rating...

Old 08-22-07, 02:34 PM
Thread Starter
Join Date: Aug 2007
Location: Beaverton, OR
Posts: 13
Received 0 Votes on 0 Posts
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.
Old 08-22-07, 05:48 PM
Join Date: Oct 2004
Location: New Jersey
Posts: 1,131
Received 0 Votes on 0 Posts
Go see your vapor barrier thread.

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

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: