3/4 Tongue & Groove plywood or T&G OSB

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Doubling up joists merely for the sake of a plywood break in a floor system is absurd...a waste of time and material...

 

[EddieWalker]

I guess the only problem that I really see with the double joist at 8' will be that if those 2 joists are not true with each other it could cause me some grief, but I believe I can take a plane and true any of that up. I actually plan on putting down some underlayment and some sort of wood laminae for my finish flooring.

You're doing fine. Be careful of over thinking this. In most cases, the small strip of plywood ends up under the wall framing and you never even know it's there. If you need some blocking, add the blocking. Most houses have it somewhere, it's just an extra board for securing what you are attaching. Most common is in sheetrock, but roof decking is also pretty common to have a little extra blocking.

To me, there is a huge difference in doing it yourself and making it happen, and hiring a pro to do it for you. I'll criticize every little thing that I see wrong when you are paying a crew to do it, but not so much when you're doing it yourself.

 

[4570Man]

You're doing fine. Be careful of over thinking this. In most cases, the small strip of plywood ends up under the wall framing and you never even know it's there. If you need some blocking, add the blocking. Most houses have it somewhere, it's just an extra board for securing what you are attaching. Most common is in sheetrock, but roof decking is also pretty common to have a little extra blocking.

To me, there is a huge difference in doing it yourself and making it happen, and hiring a pro to do it for you. I'll criticize every little thing that I see wrong when you are paying a crew to do it, but not so much when you're doing it yourself.

If you don't like the small off cut you could always cut 16" or whatever the joist spacing is off the previous piece. The last subfloor I put down I started with a piece that wasn't 4' because doing that allowed me to put down 2 more full pieces. If I started with a 4 foot piece I'd have to add 6" at the other end.

 

[Lineman North Florida]

Doubling up joists merely for the sake of a plywood break in a floor system is absurd...a waste of time and material...

Well it won't be the first thing that I did that someone thought was absurd, landing my subfloor on a full joist every 8' just seemed like it would be stronger rather than 1/2 a joist at 3/4", we will see how it turns out.

 

[Lineman North Florida]

You're doing fine. Be careful of over thinking this. In most cases, the small strip of plywood ends up under the wall framing and you never even know it's there. If you need some blocking, add the blocking. Most houses have it somewhere, it's just an extra board for securing what you are attaching. Most common is in sheetrock, but roof decking is also pretty common to have a little extra blocking.

To me, there is a huge difference in doing it yourself and making it happen, and hiring a pro to do it for you. I'll criticize every little thing that I see wrong when you are paying a crew to do it, but not so much when you're doing it yourself.

Thank you I appreciate you're input.

 

[RedNeckRacin]

I looked through the 2009 IRC that i was required to follow building my own house and didn't see any mention of staggering the joints in the sub-floor but its certainly better to do so than to not. Tying everything together makes a stronger structure.

 

[prichard]

I looked through the 2009 IRC that i was required to follow building my own house and didn't see any mention of staggering the joints in the sub-floor but its certainly better to do so than to not. Tying everything together makes a stronger structure.

I think that would be based on manufacturers installation docs not IRC

 

[buckeyefarmer]

I'm sure the OP will be fine doing it his way for a hunting cabin, however since people mentioned sources.

I pulled out my framing book "modern carpentry". It says to stagger.



So then i checked in the AIA graphic standards (this is the architect's bible), and it says to stagger.

 

[fried1765]

Doubling up joists merely for the sake of a plywood break in a floor system is absurd...a waste of time and material...

AGREED !!!
It makes absolutely no sense!

 

[Lineman North Florida]

AGREED !!!
It makes absolutely no sense!

Thank you, the two of you have made that perfectly plain by now, I used 8 extra floor joist on the project, I don't think it will break me.