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Duct Construction and Uses
Discussion in fabricating and use of products that move air including spiral pipe, duct board and typical sheet metal work.
       


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  #1  
Old 03-05-2011, 08:53 PM
CWULFF CWULFF is offline
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Default Exposed Spiral

How do most of you seal exposed spiral that will be painted? Do you use brush on duct sealer, hardcast tape, or paintable caulk? Our shop usually uses caulk but i stime consuming and a PIA. Brush on duct seal would be the easiest but I'm worried about appearence.
Thanks in advance for your comments.
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Old 03-06-2011, 08:32 AM
cactassdupree cactassdupree is offline
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Wink sealing

All of the above. The specs should tell you what they want you to do. If they don't the boss will want to do a good job but cost is a factor too. As far as looks, only another tin knocker will notice anyway, right? dupree
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Old 03-06-2011, 04:52 PM
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Originally Posted by cactassdupree View Post
As far as looks, only another tin knocker will notice anyway, right?
That's a good one.
Everywhere I go, (stores, restaurants, etc.) I'm always looking up checking out the ductwork.
The wife thinks I'm crazy.
She's probably right.
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Old 03-06-2011, 05:24 PM
cactassdupree cactassdupree is offline
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Wink Looking at your work

In the "70's" I helped install 4 large exhaust fans on the roof of a commercial building about a half mile from my house. Every trip we pass those fans I would point them out to my wife. Wasn't long and she was pointing them out to me. Peace dupree
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Old 03-06-2011, 05:40 PM
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Everywhere we drive around here, I'm always pointing out places that I've worked at over the years.
"Hey, I did the ductwork at that place."
I'm sure it's annoying.

CWULFF: Welcome to the site, and, as dupree says, once it's all painted, no one will notice it.
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Old 03-07-2011, 05:57 AM
tnbndr tnbndr is offline
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For exposed spiral we usually caulk the inside prior to assembly to create a seal and have it look decent.
Lindab makes fittings with a rubber seal that don't require any sealant, we have used that on jobs where exposed duct was necessary and they wanted a clean look. It is a bit expensive though. But remember you save the time it takes to seal whether caulking or smearing the outside with duct sealer.
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Old 03-07-2011, 03:33 PM
cactassdupree cactassdupree is offline
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Wink Whoops

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Originally Posted by Dad View Post
Everywhere we drive around here, I'm always pointing out places that I've worked at over the years.
"Hey, I did the ductwork at that place."
I'm sure it's annoying.

CWULFF: Welcome to the site, and, as dupree says, once it's all painted, no one will notice it.
I think i said only tin knockers will notice Thank You. get it right DAD!! dupree
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Old 03-07-2011, 06:29 PM
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Quote:
Originally Posted by tnbndr View Post
Lindab makes fittings with a rubber seal that don't require any sealant
Thanks, I'll look that up.

Quote:
Originally Posted by cactassdupree View Post
I think i said only tin knockers will notice Thank You. get it right DAD!! dupree
Tin knockers aren't necessarily normal folk.
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Old 03-08-2011, 03:31 PM
cactassdupree cactassdupree is offline
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Wink Agreed

about that.. dupree
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Old 03-09-2011, 03:10 PM
CWULFF CWULFF is offline
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Quote:
Originally Posted by tnbndr View Post
For exposed spiral we usually caulk the inside prior to assembly to create a seal and have it look decent.
Lindab makes fittings with a rubber seal that don't require any sealant, we have used that on jobs where exposed duct was necessary and they wanted a clean look. It is a bit expensive though. But remember you save the time it takes to seal whether caulking or smearing the outside with duct sealer.
I never thought about caulking the inside before hand, but it was below freezing when we did the install. I have used the rubber seal fittings before and they work great, unfortunately they weren't spec on this job.
Thanks for all the replies.
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