Welcome! Here are the website rules, as well as some tips for using this forum.
Sealing flex duct joints - I forgot one
Today I was in a hot attic installing a 10-inch flex duct to a new take-off from an AC plenum. A super tight, awkward, back twisting job, flat on my back,
I used two zip ties with a tensioning tool, but in my discomfort, later realized that I forgot to use mastic on this joint, after wrapping and taping the insulation.
Should I not worry about this mistake? How much air leakage can there be with two tight zip ties. Obviously not the right way to do things, but it was such a painful task, I would need a good motivation to fix the mistake.
P.S. It's my own home.
Steve from Newton, MA