OK, I think the substructure is pretty strong, the joists are 2" thick rough
cut (type, I'm not sure). I'm looking for a reason to get rid of it!!! I
would much rather take it out and replace the whole thing. I will try the
more flexible caulk. Iwould like to get behind that surround and see if
there is any support for the tub wall back there. The front is well
supported with a 2x4 frame, but I'd be willing to bet that there is nothng
on the back side. The previous owners cut MANY corners in this house. Using
a drop ceiling to hide electrical wiring for one!