Took me 3 hours to figure out why my mud was bubbling
Last Tuesday I was finishing a ceiling job in an old house near Cleveland. I mixed my all-purpose mud just like always, but when I started taping, the compound was bubbling up like pancake batter. I thought maybe the mud was too thin, so I added more powder. Kept bubbling. Then I checked the temperature and humidity, both fine. Finally after 3 hours of fighting it I called a guy I used to work with. He asked if I had cleaned my mud pan. I had not. Turns out there was old joint compound residue in the pan that had turned and was releasing gas. Cleaned the pan, mixed fresh mud, problem gone. Has anyone else had this happen with a dirty pan or am I just the only one who forgets to rinse?