1/8 in spacing has been recommend for sheeting of sub-floors, exterior walls and roof decking. In example laying out top double plate for trusses on 2ft o.c. on a 56ft long building, what is the technique you use to allow for this 1/8in spacing?
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my opinion is don't worry about it, the 8'way. I f you are, get material that sized for spacing, or trimoff a little every other sheet, if you cheat the trusses over your sheetrock underneath won't break.If that's what's going underneath. The 4' way gets a clip anyway, for support and to make a gap for expansion, so there's some relief.
# # # # # # # , # # #--# # # # !
I agree with Red .you just have to trim the sheet once it gets to a point where the sheet isn't supported enough.
I know it's a pain but if you want to comply thats what you have to do.
DAVE
I can't remember that I've done one this long, but I don't even think about it. Now that you made me think, I figured out that in 56', you have seven sheets for six joints which take up 3/4". If you start in middle, this is all of 3/8" in the run to the end. I consider that negligable.
OTOH, If you laid out with a framing square and let it creep, you'd be in the right neighborhood too.
Thanks for the replies . I am a little embarrased when somebody sees me useing a thin kerf blade cutting the butt joints after the sheeting is on the roof to allow for the 1/8" space and I dont have a good explanation . Have the best week you ever had.
For what ever reasons (cost I,m sure)we use a ton of osb for exterior and sub floor and seeing as it rains a bit in Seattle we take spacing real sserious. The 3/4 saub flooring is usually manufactured to have 1/8 gaps, and I think I've seen 1/2 inch with the same, not positive. I wouldn't even think of specifically trying to spread my L.O. In walls, windows and such break up sheets any way, and I don''t worry abut the gap as much, though I still try to gap it some because of weather conditions. However, If you don't gap sub floor around here ,you'll be back with the sander. Floors are so broke up around here any more its hard to get a good un broken run anyhow. Even with long runs on a good l.o. that hasn't been wrecked by an over zealous engineer, scribing a 1/2 inch trim once each row isn't so bad.Same with the roof, straight runs preety much extinct these days. With clips you obviously don't have to worry about the 4 ft. direction, but again, around here you will have noticable humps and ripples through the roofing if youdon't space both directions and ripping one sheet a "wee" bit per run is way easier than pulling roofing.