Sealing gaps in duct work letting out air ( sh.itjust.works )

pdavis , 9 months ago

I have to confirm that mastic plus aluminum tape is the way to go. The mastic will help fill the gap and protect the tape from drying out and peeling away. Be sure to clean it thoroughly so the tape will stick long term. Be generous with the tape as over time it may begin to fail. Mastic is doubly important if you have condensation issues. And if that is the case, or the duct work is in unconditioned space, you should consider insulating and covering the duct work.