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Posted by Alan on May 2, 2007, 12:15 pm
Look into the possibility of using a self-leveling floor compound to
improve level on the subflooring. This would be a thin layer of
concrete, in effect, that would shim the difference you need. Nailing
through it might be a trick, but given the thickness, probably not.
Anyway, it's just an idea, and potentially an easy solution.
>
>
>
>
> > > Hello,
>
> > > I have a 1920s house I am remodelling and got to the floor phase.
> > > Decided for hardwood. Problem is that the upper floor sagged about
> > > 1/2in (in the center) over the years and I cannot push the floor back
> > > up.
>
> > > The hardwood planks are about 5/8in thick and 3in wide.
>
> > > Right now I am considering two options.
>
> > > 1) get laminated wood in several different thicknesses, cut strips and
> > > screw them to the old floor trying to eliminate or, at least, reduce
> > > the sagging to a minimum and then nail the hardwood planks to them.
>
> > > 2) pour self-leveling compound and then glue the hardwood planks to
> > > the cement, as suggested by a friend, but I am not very fond of this
> > > method.
>
> > > Anybody has experience with this problem and how it was solved?
>
> > > Thanks in advance!
>
> > Regarding option one, I'm skeptical of the practicality of that. How
> > would you decide what thickness where? Wouldn't the thickness have to
> > vary on at least some of the strips. I've thought before of screwing
> > down a 2x2 and snapping a line at level, and then removing the strip,
> > sawing it, and reapplying it. Sounds like a ton of work. I think you
> > would have to fill the spaces between the shims with floor fill or
> > something. Liable to get a lot of squeaks.
>
> > There have been other posters on this group who have inquired about
> > nailing hardwood down over self-leveling compound. Not sure how it
> > turned out, but I really think that it might be the way to go.
>
> > The option you don't list is leaving the floor as it is. It is a 90
> > year old house after all. Part of the character of an old house is
> > dips in the floors IMO.
>
> I thought about leaving as is but it would look really terrible. I
> can live with minimizing the sag but have to eliminate it at least
> where the doors are. I tought about getting different laminate
> thicknesses and nail/screw them over the wood strips of different
> thicknesses.
>
> That would give me a relatively flat surface to nail the hardwood
> planks to. It is a lot of work indeed, ergo the questions about
> laying cement leveler and gluing the hardwood planks instead of
> nailing them.
>
> How does glue work with hardwood floor meant to be nailed? What could
> be the problems coming out of doing so?
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