One or Two Layer Subfloor?
Wd it be unusual to have our framer put down two layers of plywood over the joists (one Â¾" and one Â½"); that way, the Â½" layer can be removed at exterior thresholds to get doors to fit with finished flooring a lot better?
Also, it seems the joints between the two layers could be staggered to give more rigidity to the floor, too. Various Sturd-i-floor 4x8 panel makers claim their products replace subfloor and underlayment in one product, but is a two-layer system better (specifically, will it offer a better linear deflectance value?)
And how does one achieve a squeak-free floor if using a two-layer system?
Thanks for feedback, Mark