On Oct 15, 3:33*pm, "Colbyt" wrote:
"Joe" wrote in message


But I certainly dont need 3 layers.

Joe you came here asking for advice and you are getting some from people who
really have done this a few times.

And I appreciate the advice. Nobody asked what my finish floor was
going to be but I already knew, and that might have avoided some
misunderstanding.

Allow me to define some terms.
A sub-floor is anything that is not finishable. No matter how many layers of
plywood you put down it is all subfloor.
Half inch plwood is not a suitable surface to nail or screw anything to if
you want it to last. You need to hit the joists with your 8D nails. You are
wasting you time worring about stuff that isn't going to last no matter what
you do or don't.

I didnt realize it but It appears that they only nailed the previous
5/8 into the joists-I didnt pay that close attention when I pulled it
up (it was particle board that had gotten wet, and it was a
nightmare), but I see now they didnt nail it in the field much, if at
all.



You might very well need 3 layers if you plan on using vinyl tile or sheet
goods because unsanded (very smooth) * plywood is not an acceptable base for
either.

You can carpet over the sub-floor as defined above. You might get away with
the new loose-lay vinyl over a tightly fitted top layer of smooth plywood..

Thats what i'm putting down, floating vinyl in one room and carpet in
the other. So it seems I dont have a problem anymore, I just nail
into the joists.