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TVeblen wrote:
>
> <mj2736@yahoo.com> wrote in message
> news:1177382872.004990.50390@b75g2000hsg.googlegroups.com...
> > 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'll 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!
> >
>
> Save your money. 1/4" anything will not add any appreciable strength
> to the floor unless you glued and screwed it in place to achieve a
> complete bond across the entire surface. Staples would be the worst
> fastener to use, followed closely by overdriven gun nails. The
> plywood will span lumps worse than 3/4" flooring strips. Your chances
> of floor squeaks will increase significantly. And the normal staples
> used to install the strip flooring will perform worse through the
> 1/4" material. Get out a hammer and wide chisel and knock off the
> glue and any other glop on the floor. Drive down any proud nail
> heads. Chisel down any swelled joints. Use a thick underlayment paper
> like heavy felt. And run the flooring perpendicular to the floor
> joists regardless of any aesthetic considerations. The hardwood
> floor manufacturers association has never recommended installing
> hardwood strip floor over OSB plywood due to poor fastener grip. The
> engineered products like Adventec are approved, but not true OSB
> plywood. But this defect could be overcome by using extra fasteners.
Make sure that the underlayment paper isn't bituminuim based , in hot
areas its been known to stick the floors together , the floors need to
have an expansion facility thats independant of each other
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Re: Underlayment advice for oak flooring strips
