I bought a fixer-upper knowing little about how much of a headache I was creating for myself.
I've recently removed the hardwood flooring that was lain directly on the joists (no subfloor) of my second floor bedroom. I'm now laying a subfloor and will install hardwood flooring on top of it.
After screwed (yes - screwed) down most of my plywood, I noticed that my joists were uneven. As you go from one joist to another, they drop by as much as 1/2-3/4 of an inch. This is noticeable and I would like to correct it. Fortunately, I can easily unscrew my plywood (ha!)... but now what?
I'm leaning towards putting shims between the joists and the plywood subfloor, but I don't see much talk about doing that online. What kinds of shims should I put on the joists? Do they run along the joist or perpendicular to it?
Backtracking a little, the joists seem to be low because they were partially cut (I have no idea why) where they would otherwise rest on the bearing wall. I've put some blocking underneath them to provide some level of contact between them and the bearing wall, but I can't (and frankly don't really want to) raise them to be level. It has crossed my mind that I should replace them. Advice would be appreciated here, too.