Definitely not overkill. Even if you were installing perpendicular to
the joists, you should probably put down the extra 1/2" plywood. OSB
does not hold nails well and when I was researching installation of
flooring, all the advice I received said I needed at least an extra
1/2" of ply. I installed my pre-fin flooring at a 45 degree angle to
the joists. Other than adding some extra subfloor, the installation of
prefinished floor is a breeze.

-Rob

MacBain wrote in message . ..
As a long time lurker and occasional contributor to this group I
realize this may not be the correct to post this message but I'm going
to do it anyway. :-)

I'm a competent amateur woodworker,
http://bmacgillivray.ott.istop.com/w.../projects.html and
have done my fair share of home renovation projects but I've never
installed hardwood flooring before. I've read up on it on a few web
sites and perused the flooring book from the Borg and in all cases
they suggest runing the flooring strips at right angles to the joists.
Esthetically, this will not work in our house.

The current subfloor is 3/4" osb and is in ok condition. I read
someplace that to install the flooring parallel to the joists an extra
1/2" plywood layer would be a good idea. Is this necessary or is is
overkill?

TIA
BMG