Originally Posted by nealtw
2x10 is a great idea and when in doubt put more in, take a photo so you can find them easy later.
Photo is a good idea. I plan to put some marks on the walls surrounding the tub-- maybe with painter's tape-- to make sure I know where they are.
The surround I plan to get can come with built-in-backers, but even the ones that don't of that model can have grab bars if there are boards behind it. It's one of the Sterling direct-to-stud surrounds. I looked at some of the Maax ones but they need to be over drywall but there isn't enough space to add something as thick as drywall. We have thin fugly wood panels with green stripes printed on them.
I'll have more leeway with the laundry area tub since it will be built fresh.
In a bit of good news, I befriended a really nice guy who is a carpenter and he offered to come over and look at the floor joist under my bathroom that some idiot notched out for the tub P-trap. He's going to see what needs to be done to reinforce it.