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Old 06-04-2018, 03:57 PM   #1
RichVT
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Floor Deflection Article

I saw this in another forum and thought some of you here might find it worth a read.

http://www.componentadvertiser.com/P...ood%201806.pdf
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Old 06-04-2018, 10:42 PM   #2
Tool Guy - Kg
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Frank and Peter have always produced well writen info that's easy to absorb.
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Old 06-05-2018, 07:09 AM   #3
DownEastGC
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Thanks! I'm actually doing some reading on subfloors right now, coincidentally. Part of the whole-house reno I'm doing is 3/4" hardwood and there's only 1/2" square edge ply subfloors (ugh!). Trying to decide how I want to build it up.
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Old 06-05-2018, 10:01 AM   #4
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Chris,

Assuming your flooring is solid and not engineered and that it's running perpendicular to the joists,I would say you've got a great start. Another layer of plywood, half-inch or greater, should do the trick. Then a tiling membrane, of course.
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Old 06-06-2018, 09:24 AM   #5
DownEastGC
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Hi John

Sorry I mislead you there a bit... I'll actually be installing some 3/4" oak hardwood flooring over what used to be 1/2" square edge ply + 3/4" particle board, then carpet.

The tile on this job is just in the bathrooms. In there I demo'd right down to the joists and did 3/4" advantec screwed & glued then 1/2" underlayment plywood offset & screwed to the advantec only. I learned that trick on these forums awhile ago :-D Then my backer over that (in this case, 1/8" ditra)
I love doing tile subfloors this way. It's SOO solid. Got that nice "thud" sound underfoot.

For the hardwood floor install I'm trying to decide what approach to take.
I'm weighing these three options:
  1. Leave the 1/2" square edge ply, screw the crap out of it & add another layer of 1/2" ply stapled or screwed
  2. Pull the 1/2" ply, put down 3/4" advantech (I'm worried about holding power of Advantech with hardwood cleats)
  3. Pull the 1/2" ply, put down 3/4" t&g plywood (this is what i'm leaning toward)

Anyways - sorry, not to derail your thread! Also this IS the tile forum after all, not hardwoodflooringtalk.com

here's my normal tile subfloor procedure these days (pics)
PL Premium & GRK framing screws everywhere
I also like to just "lean" up on the old subfloor a little and sneak some PL under there too before screwing those down.

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