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Ductwork How to install a duct takeoff start collar-The Sheet Metal Kid

Posted by Ryan Murray on 27th Apr 2014

All right, next up as promise. I was going to show you: “How to install a sheet metal start collar right into a piece of duct.” So if you haven’t already, go ahead and take a look back on my videos on how to cut a round hole into a flat piece of duct or a sheet metal. So, these start collars; there’s a couple of features to them that people really don’t understand.

First is: “How to clip it.” The clip it, there’s a little female groove right here and that’s actually going all the way through the duct. Second: “There is this little tab and what is got is this little button punches on is what we call it.” So, what you want to try – do is: “You take that button punch tab and sometimes they’re a little difficult. So, you kind of get them rounded.” But, we’d be through shaping or just handling material; take that tab and bend it down even a little bit more.

Get that tab in there and push it until you here a snap up there it goes. No? Sorry. There, there’s the snap that we’re looking for. So, they’re not the prettiest thing in the world of course; but they do the job. They’re start collars and so, we’re going to round this off as much as possible.

Next thing that you want to do is: “You have these dovetails, that’s why it’s called the dovetail start collar.” You start bending this out and the good rule of thumb that my grandpapi used to tell me: “You want three in the middle.” So, every fourth one and this doesn’t really matter if you’ve bend too many or – as long as you got some on the outside is really what we’re look out for.

So, now that we got our dovetail start collar, we’re looking like that with our tabs right outside with those. What we’re going to do of course is: “Just sit right on top of the duct like that.” So, that gives us sort of that – we don’t push it into the duct and now, order not pull out; we’re just going to take those dovetails and we’re going to bend them right inside the duct.

We’ve got big ones over 14 inches or something like that then, you can go ahead and you use your hammer; if you can fit it inside there to knot these over. Generally, I just go ahead and push them over, it gives you a nice tight squeeze and then, there it is. I go ahead and I spend my scene over to where it’s really not going to be seen. That’s it. That’s all you have to do.

Some people like to run a screw or two. One of these exterior dovetails but generally, it’s not necessary considering the amount of CRH to it, conventional, residential home. So, we’ll go ahead and stick that in there. Just like before, we’re going to take our water-based duct seal it, lead the pooke and we’re just going to run over the top of this.

You’ll see that some of it’s got little bit of gap holes. But, we got to heal that gap hoses with a little bit of pookie. Duct Sealant is also pookie in the industry. So, you’ll see a lot of the [inaudible] and all of that have is pookie all over themselves because this is what they’re doing all day long.

Their journey is ahead of them, rough it in the house and the [inaudible] is got to go back and pookie everything. So, there you have it. I like to get my access off and even run a little bit on the inside here to where you’ll see a glob out a little bit. You can always come for a second coat. If you’re afraid of this one or if you’re afraid that your hole was a little bit too big, you can always come back and run another.