I am trying to learn how do repair my bathroom drywall. Next to the tub surround there was a lot of black mold under the paint. I peeled off the paint and saw that the drywall was crumbly, right where the two pieces of drywall meet. The area that has crumbled off is about the size of a cell phone. Is it ok for me to just get a drywall patch and fix it or do i need to take the drywall down and put up new pieces? Also, there is a gap between the drywall and the tub surround. Do i just fill that with caulk? I need to recaulk the tub anyways, as the last owners did a bit of a botched job.
Attached is a picture of what I'm trying to articulate!
THanks so much for your help in advance!!