subfloor / joint questions

Started by beckhamk, July 09, 2011, 05:52:25 PM

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beckhamk

Will be starting our joists next week and had a few questions.

1) for the subfloor sheets, plan to use construction adhesive and screw these down, I hate having to deal with squeaks later on.  So my question is what type of screws?  Can I use drywall screws?  I have built crates to ship motorcycles and have used those with great success.  Looking for an ok or other options.


2) joists:  i have the framing manual that john talks about on his website.  We have a girder in going down the center of the cabin and will be overlapping the joist there.  We started marking off the joists on the sill plates starts at the left 15 1/4 then measures every 16in and marked our X's.  So my question is this, at the very end of the cabin on the right side the last joists (not the rim/header joist) lands basically right at the inner edge of the sill plate.    So if I place those joists there I will have to end up drilling a hole through the joist and then the header (if I ever need to go outside the house later on).  So I would assume I will need to move this last joist to the left (possibly 12in on center) to give us working room in the future?

Thanks for your insight.

Don_P

#8x2-1/2" drywall screws are not listed but should be fine.

As long as that joist isn't a breaker... which it wouldn't be that close to an edge, you can shift it as long as you maintain tighter than the max floor span rating stamped on the subfloor ply.


beckhamk

Thanks for the info.... ended up getting the decking screws with the special heads should make for easier screwing....

One other question about putting down the subfloow. I understand the spacing and seams, but i thought i read somewhere maybe on this forum about cutting the first row of 4x8 sheets so that it ends up lining up evenly on the other side. Does that ring a bell?

rwanders

you may be referring to cutting a 4x8 sheet in half so the seams will be staggered in the manner of brick. or you may be referring to the fact that a 4x8 T&G sheet is actually only nominally those dimensions. They are actually about 1" smaller so you may want to adjust your starter sheets so you can avoid having to use a very narrow strip on the other end, remembering to layout so your joints always fall on a joist. or other nailer.










Rwanders lived in Southcentral Alaska since 1967
Now lives in St Augustine, Florida