I just found this app and its at the same time amazing and intimidating. You think you know so much but there is always another way or at least another idea.
Which leads me to my question.
I am contracted to repair two emergancy staircases in a 9 story building that where damaged by a frozen pipe exploding on the roof. The sheet rock is flaking of and was moist in some areas and has since dried. Do I need to replace the rock or can I scrape, tape and prime with maybe a killz type primer?