Sealing of ductwork
My ductwork was leak tested, found to be leaking around 22%. Sealing using mastic seems the best route to go. My ductwork is insulated with fiberglass faced with radiant barrier. I'm guessing the easiest way to remove the insulation without destroying it is to remove/cut the tape and then re-tape when finished?
Additionally, what sections (runs, elbows, boot connections, etc) of the duct are worst offenders for leaking? I know there are seams throughout, but if I had to choose the most likely parts, what would you say?
I would appreciate any advice about the entire process of sealing with mastic, including suggestions from those who have already done this (best practices, tips, etc).