A six inch oval of paint on my ceiling is bubbling. The spot is directly below our bathroom, specifically the tub. After looking at the pipe crawlspace in our bathroom, I saw that no pipes are leaking (I realized that I'm not a plumber but I did not see anything obvious). However, I found a damp area where the tub meets the floor. When I looked two weeks ago, there was no damp area; however, the shower was used prior to looking at the problem today. I inspected the damp area and noticed a gap in the caulk. I pulled up the caulk, which was damp and very easy to remove. The area behind the caulk is damp in both corners and some of the old tile (original to the house, which was built in 1923) can be pulled up along the tub. I have two kids who love to splash water everywhere when they bathe so I would assume that we have an issue with water on the floor seeping through the caulk. I plan on drying out the area, re-caulking and then taking measures to assure that the water stays in the tub/shower where it belongs. However, I'm concerned with the ceiling and any damage that may have occurred within the ceiling. The walls and ceilings in the this house are plaster. There is no drywall. Since it's seems to be a dampness issue, there is no water leaking from the ceiling and the ceiling is not wet, after fixing the caulk, is it safe to simply remove the bubbling paint from the ceiling, prime and repaint or do I need to have someone come out to cut open the ceiling and replace the plaster? Really hoping to avoid that one!
Any insight would be appreciated. Thank you! kg