I’m seeing a crack in the corner of the ducts. Can I just tape it shut with boxing tape or is there a better way to do it?
Also, one register in an unfinished area is turned off but I can feel it leaking air. I looked inside and there’s clearly a gap letting air past too. Can I also just cover the register in reflectix and tape that shut too or is there a better option? Thank you :)
I’ll echo what others said about the aluminum tape. Make sure it is a good one, not a cheap one. You might want to take a damp rag to the area first. Any dust will stop it from sticking. Make sure to let it dry too.
Mastic could work as well. Get a tub of it and a chip brush or two… and don’t forget gloves. It sticks to everything and is rubberized, so it holds up very well. The only downside is that it makes a mess very easily.