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October 22, 2009
Installing Wood Floors
We removed the rotting subfloor and installing new plywood right unto the joists before installing oak strips. Advice whether to use 1/2 or 3/4 in plywood?
Comments
Be sure to use toung and groove plywood for the subfloor and screw twice as many screws as you may think necessary. - keep the subfloor "tight" to the joists - do it now, can't later.
Posted by: SenatorStreet at October 22, 2009 10:04 AM
You've removed the existing subfloor, right? Then 3/4" plywood is recommended
Posted by: bessie2 at October 22, 2009 10:30 AM
3/4" subfloor. Glue the subfloor to the joists in addition to screws to avoid "creaking" noises developing over time. Also for more acoustic separation, lay down a layer of 1/4" cork (or similar) between the hardwood and the subfloor. Not sure about T&G - thought that was more for a roof or if the floor was treated as a structural diaphragm or to prevent racking. I thought you use straight edge plywood and leave 1/8" gaps at joints (could be wrong). Oh yeah - make sure you get PLYWOOD and not OSB or particle board.
Posted by: wilso26941 at October 22, 2009 2:03 PM
1/2 is too flexible and SS is right, tongue and groove is best if you can get it
Also, a heavy duty construction adhesive on each of the joists as well
Posted by: daveinbedstuy at October 22, 2009 2:03 PM
3/4"
Ed Kopel Architects
Posted by: edkopel at October 22, 2009 2:35 PM
Lots oh glue... well, yeah, adhesive if you want to get all technical. sticky stuff that dries.
Posted by: tybur6 at October 22, 2009 4:01 PM
From my recent renovation experiences, 3/4" plywood subfloor (no pressboard or particleboard to cut cost or corners!)
Posted by: LNBlog at October 22, 2009 5:17 PM
I would do two layers of 1/2" in alternating directions or one layer diagonal to avoid squeaks (from seams overlaping) with a spread of adhesive or green glue between. but i've been told that i overbuild things.
Posted by: southslope at October 22, 2009 8:41 PM
I think 3/4" plywood subfloor would be better.Use screws to tight the subfloor and apart from it glue it to the joist.
Posted by: beesondirect at October 23, 2009 1:16 AM
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