Joists dimensions vary
I noticed a crack in the old tile in my bathroom before removing them, but thought it was a plywood issue. But after measuring my 2x9's from below Iv determined they must have been ripped on a Monday or Friday because they vary in height about 3/16" of a inch. And may also have crowns. Either way.. It looks like this has ended my plans on installing tile or hardwood in the home. Can SLC take care of this enough where I could lay tile or hardwood?