May be you can help me out. I am putting up some osb as a shop ceiling.
The joists arnt on 4 ft or 8 ft centers. Is there some type of t shaped
filler material that could be pushed up between the butt joints of the
osb to help fill the gap? ( on the pieces that dont fall on a joist). If
there is such an animal, what is it called?
I would cut the OSB to fit the gaps on the joists. Any attempt at fillers
is likely to be disappointing as the material sags over time at places it
is not supported.
OSB is cheap, a little cutting to fit shouldn't be to painful.
If you're going to be dumb, you better be tough
Depending on the waste it may be just as cheap to toss 2x4's up to
match the 4x8 boundaries as needed. All we know is that joist spacing
doesn't lay on 48 or 96 inches. Also we don't know shop size.
Depending on your area it may be different, but where I am a 2x4x8 is
roughtly 1/3 to 1/5 the cost of a sheet of OSB so it can be cost
effective to add a little framing.
Look in the panelling section at a BORG for filler strips. Those are,
however, likely to be cosmetic not structural.
I used OSB in my shop in place of drywall to provide a little bit more
durability against damage from things bumping into
it on occasion. To finish the OSB, first step is to insure you have the smooth
face exposed, then I just used drywall
compound and tape or webbing. In some cases there were a few face side
blemishes showing so I just filled them with
drywall compound as well, then after you are satisfied with the surfaces
showing, I primered the wall with zinseal
bullseye followed by a latex topcoat. Hope this is useful, regards, Joe.
It'd be easier to cut slots in the edges of the OSB (I'd use a table
for this, if the OSB is handle-able on edge), fit a spline into the
slots, and make tongue/groove joints. Once the first panel is
it's gonna be a lot easier to hold up the second if they interlock.
I dislike the sag potential of OSB on 4' centers, though; could you
add supports to get it to 2' ? And by all means, prime and paint
sides of the panels to discourage moisture movement. The backside
can take any bargain/offcolor/leftover paint you have, of course.
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