My master shower leaked through to my garage; we've pulled all the garage ceiling drywall and installation anywhere the moisture meter read wet. Since, my plumber has repaired the leak, but before I patch up the ceiling I wanted to wait a few weeks to really make sure the leak was sourced.
In the exposed ceiling, there is an HVAC register and a couple inches of tubing that is exposed, and since it gets into the 90 degrees in my garage, I've noticed the register is condensing and even dripping onto the garage floor. Is there anything special I should do prior to making the repair? Will a R30- faced batt be enough to keep the condensation at bay? I intend to stop the A/C, dry out the register with a fan and towels in the few hours before I actually make the repair to the ceiling. A friend mentioned adding spray foam around the register before putting the fiberglass up. Pictures attached.