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!