3/4 Hardwood Laid Parallel To Joist?

pburchett

New construction has a 34’ wide x 28’ long family room attached to a 4’x 28’ hall.
The 1” x 8” sub-floor runs the length of the room and hall.
Want to install ¾” red oak flooring:

1. If installed the 56 foot length of the hall and family room the flooring would be perpendicular to the joist, but parallel to the sub-floor. Would this make for an un-level floor, with the hardwood riding on the edges of the 1”x 8”? What if I went over all of it with a floor sander first?


2. If installed perpendicular to the sub-floor and parallel to the joist, would there be any sag between the joist? Would the tongue and groove on the flooring provide enough strength and support when combined with the sub-floor?

We do not want to add any additional panels (osb or plywood) on the floor as the hardwood would now be flush with the tile and carpet if installed directly on the 1”x 8” sub-floor.


What to do???

Project53

?????? What????...your dimentions make no sence..a 1"x8"...what is that?..are you saying thats a joist? or sub floor dimention some how......and you want to do what..sand the sub flooring?????

Tom R

I'm takin' it he means 1 X 8 planks.

Perpendicular to the planks is usually the best bet, - - unless they're dipping now.

Trouble is, - - the job would look a lot better going parallel.

Personally, - - I'd either add 1/2" of plywood first (that's not a big transition) and go parallel, - - or go diagonal and direct . . .

Big Dave

The new hardwood needs to be laid perpendicular to your 1x8" subfloor. This will minimize movement and add stability and flatness to the new floor. If the subfloor was osb or plywood then you lay perpendicular to the joist. Even if you sand the 1x8 subfloor flat it could still cup with humidity changes thus making the new floor look like crap.

Ya beat me too it TomR.

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Tom R

Whew!! Finally.

Peladu

This is clearly a HO ... read some of his last/only posts and he is building a home for his family...


Too bad he seems to be so far into his project...I could have offered him my SC2C discounts.

Project53

Yeah, Peladu....nothing makes sence so i think...it should go to the DIY section.

Peladu

pburchett must have some clout around here .... otherwise this thread would have been locked

and given the standard "Go To DIY Chat" response.

pburchett

Thanks Tom R and Big Dave.

Double-A

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