Taping furnace air ducts - Page 3

Daox · 07-29-10, 05:05 PM

I tried to find mastic before going with the tape and I could not find it at the local stores.

bergenm · 07-30-10, 09:17 AM

As far as using Duct Mastic on an operational system. You would want the system shut down for a while. But the stuff we use here in the factory is normally good to go in 24hrs. I'm sure the label on the tube/bucket is your best friend though.

Last year when I was going to do this to my house there wasn't any in stores either. I bought it from the modular factory where I work. But when I was reading this thread I looked on home depot site and it lists a tube and a 1/2gal. bucket of air duct sealant. I think the stores are coming around to the fact they have to start carrying this stuff.

Daox · 11-10-10, 07:19 AM

Quote:

Originally Posted by Daox

And I tried sealing it up with the aluminum tape. It seemed to stick to the wood alright but I'm unsure how it'll hold over time. For now, its better than leaving nothing there. If you have any good ideas here let me know. I had thought about cutting up a sheet of metal and screwing into the wood on each side making an L shaped piece.

Just a quick update on this. While I was insulating my pipes last week or so, I took another look at this to see how it was doing. Everything is still sticking and sealed fine.

pinballlooking · 12-08-18, 03:59 PM

That was some major improvements in covering up air leaks.

CrankyDoug · 12-08-18, 04:32 PM

Quote:

Originally Posted by Daox

Just a quick update on this. While I was insulating my pipes last week or so, I took another look at this to see how it was doing. Everything is still sticking and sealed fine.

Keep an eye on the aluminum tape where it attaches to the wood. Mine held for about three years but eventually let go.

Daox · 12-10-18, 09:48 AM

I was actually just in my basement and took a look at some of my taping done 8 years ago. Most of it is still good, but there are definitely area that are leaking large amounts of air again. Time to revisit things!

u3b3rg33k · 12-11-18, 02:37 AM

Quote:

Originally Posted by CrankyDoug

Keep an eye on the aluminum tape where it attaches to the wood. Mine held for about three years but eventually let go.

a quick and dirty reinforcement might be a couple of T50 staples across the wood/tape mating surface.

07-29-10, 05:05 PM	#21
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	I tried to find mastic before going with the tape and I could not find it at the local stores. __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

12-08-18, 03:59 PM	#24
pinballlooking Super Moderator Join Date: Jun 2013 Location: SC Posts: 2,923 Thanks: 172 Thanked 564 Times in 463 Posts	That was some major improvements in covering up air leaks. __________________ Current project Aquaponics system , Passive Solar Greenhouse build To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Solar Install 12.5 Kwh- To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Mini Split installs - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. EV Chevy Volt - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

12-10-18, 09:48 AM	#26
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	I was actually just in my basement and took a look at some of my taping done 8 years ago. Most of it is still good, but there are definitely area that are leaking large amounts of air again. Time to revisit things! __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

07-30-10, 09:17 AM	#22
bergenm Eco-Geek Join Date: Jul 2010 Posts: 8 Thanks: 0 Thanked 2 Times in 2 Posts	As far as using Duct Mastic on an operational system. You would want the system shut down for a while. But the stuff we use here in the factory is normally good to go in 24hrs. I'm sure the label on the tube/bucket is your best friend though. Last year when I was going to do this to my house there wasn't any in stores either. I bought it from the modular factory where I work. But when I was reading this thread I looked on home depot site and it lists a tube and a 1/2gal. bucket of air duct sealant. I think the stores are coming around to the fact they have to start carrying this stuff.