Hello, I am screwing down some plywood before I begin a tile job. I am
uinable to locate the floor joists, as the basement ceiling has been
drywalled covering the joists. How am i to screw the sub floor down into the
joists if I can't locate them. Is it imperative that I screw into the
On Apr 17, 5:26 pm, "Steve W." <sjwNOSPAMatripnet.com> wrote:
I think what you mean to ask is "is it imperative that I hit the
joists?" the answer to that is NO
If you are putting down plywood for tile I'm assuming it is on the
floor and not the ceiling. I am also assuming that this is not a NEW
sub floor otherwise the joist would be exposed. So that tells me you
have a wood floor that you are putting plywood over to do tile on.
first of all why plywood and not something like hardibacker? second if
you have a sub floor weither you use plywood or hardi you should put
coated screws in 12" on center and closer on the joints.
The house is 55 years old.
I used construction grade plywood because I'm going over top of the original
sub floor and it was
reccomended to me.
Approximately how many screws should I use on 135 sq ft of sub floor?
On Apr 17, 9:23 pm, "Steve W." <sjwNOSPAMatripnet.com> wrote:
IM is right...you dont' have to hit the existing joist, and keep a
1/8" (or nail width) space around the perimeter
You don't mention it...but don't forget to put a uncoupling layer in
between the sub floor and the tile, Schluter's Ditra, cement board,
hardi backer bedded in thinset.
Check out the forums over at http://johnbridge.com/vbulletin/index.php...there 's
a boat load of information on tiling, prep and the like, and it seems
like a pretty friendly place to as tiling questions.
Procedure for screwing them down? In other words, do holes need to be
predrilled & countersunk to prevent that "bump" from forming as you
drive a countersink screw into a non-countersunk hole? Or do you sand
the 100's of bumps? OP didn't specify what type tile he is setting,
but if CVT it will show every irregularity in the plywood,
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