On Apr 23, 9:47 pm, wrote:
Is there any reason why I wouldn't want to use either 1/4-inch lauan
or hardboard as underlayment for 3/4-inch oak flooring strips
(nailed)? The subfloor is 3/4-inch OSB with somewhat rough, uneven
surface and hardened glue in some places, which is why I want to put
down an underlayment to provide a more even surface for the finish
floor. I know I could use 1/4-inch plywood, but that is a little more
expensive than both the lauan and the hardboard. But if there's a good
reason not to use one or both then I will spend the extra money for
the plywood to ensure a solid installation. Also, what is the
recommended way of attaching 1/4-inch underlayment to the OSB
subfloor? I think the 7/8-inch staples I already have would be the
quickest - is that okay? Thanks!

Perhaps a floor installer will chime in, but in the mean time, I have
glued bamboo to the floor in my slab house. Floor leveler is
recomended even for wood subfloors I belive to even out joints, low
spots, etc.. I would not go to the trouble and expense of using lauan
or hardboard, in fact I doubt you would get near the nail retention
you would just with the OSB.

http://www.hammerzone.com/archives/f...k1/stapled.htm

http://www.osbguide.com/pdfs/EL813.pdf

I found these pages on a quick search, you can do the same :!)