I am installing 3/4 inch oak hardwood in a hallway 20 ft long and 4 1/2 ft
wide. I am installing it the "long way" on a 5/8 inch plywood subfloor. My
problem is that the 12 inch floor joists change directions so that the
hardwood will be parallel with the joists for the last 7 feet of the
hallway. The joists are on 16 inch centers and I thought about going under
the floor and installing blocks between the joists, but the central heat
ductwork is in the way. The only way I can put blocks in is to cut into the
subfloor and pull enough of it up to put the blocks in from the top. I would
also have to attach blocks to the existing joists to have something to nail
to when replacing the subfloor. Is this all necessary, or can I just lay the
hardwood on the floor the way it is for that short distance. Thanks for the
I do not intend on changing the direction of the hardwood in mid hallway. I
will only go the "long way". It is only the joists that change directions.
My question is only will it be a problem going the same directions as the
joists for a distance of 7 ft.
I don't like running strip flooring parallel to the joists,
particularly in high traffic areas with a thin subfloor. I wouldn't
seriously consider running it parallel on anything less than 3/4"
sheathing with joists 16" OC, and I'd still be thinking of maybe
laminating 1/4" plywood depending on what's going on with the
You would know you had made the wrong decision when the floor gaps
indicate the location of the parallel floor joist, indicating a high
spot. This occurs over the joist. The floor gaps between the joists
would have less of a gap indicating a dip in the floor.
You may also consider laying the floor diagonally as already
mentioned, or a herringbone pattern. Then again, you might not be
bothered by gaps in the floor and/or you're not planning on being
there for long, so it's your call! ;)
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