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Old 06-24-2007, 09:18 PM   #1
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How did you guys install your roof vents ?

I bought a pair of elixir vents and am wondering if there is a "best practice" for cutting the hole and installing the vent ?

Thanks,

Rick
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Old 06-24-2007, 11:26 PM   #2
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Re: How did you guys install your roof vents ?

I made starter holes with my angle grinder, then used a recip saw to cut the hole. However, I found the recip saw to be difficult to work with, and eventually just used the angle grinder. Only thing you gotta be careful about if you use the angle grinder up there is setting the insulation on fire. I almost did, but when I saw the stuff smoking I quickly took care of it before it became a problem...
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Old 06-25-2007, 12:12 AM   #3
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Re: How did you guys install your roof vents ?

When I cut the hole in my roof for the AC unit I used a drill to mark the corners and tin snips to cut the sheetmetal with. They cut real easy and no noise or mess.
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Old 06-25-2007, 11:07 AM   #4
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Re: How did you guys install your roof vents ?

Excellent help, I hadn't thought of the snips. I was set to use the sawzall but was worried that the blade would go wonky between the two layers and cut crooked.

I would think I'll need to fill the gap between the two layers of steel with something solid, I was thinking chunks of pressure treated wood ?

Is the roof rounded enough to require filler strips at the sides or no ?

Thanks guys, and girls if you are out there

Rick
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Old 06-25-2007, 03:59 PM   #5
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Re: How did you guys install your roof vents ?

I filled in the gaps on the left and right sides with regular 1x3 trimmed down to fit the gap. Had to have something in there to keep the two roof parts from meeting in the middle when installing the AC unit. I didnt take any pics of the wood strips in there the first time, but I will on the next AC unit that i put in.
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95 IH 72 passenger transit school bus w/ DT466 and 545 Allison.
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Old 06-26-2007, 09:22 PM   #6
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Re: How did you guys install your roof vents ?

Got the first vent installed tonight. I marked it off from the inside, drilled the four corners, cut out the square with jigsaw with fine metal blade, then trimmed with tinsnips to fit the inside trim properly. I then went on the roof and repeated the same process up there. I did use the comercial install kit which worked well, and I didn't seem to need to put anything between the two tin roofs. I can always take off the inner trim and put a spacer in later if needed. I also was able to install without any shims. 92 blue bird TC2000, seems to have a fairly flat top in the center.

Thanks all,

Rick
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Old 06-27-2007, 06:39 AM   #7
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Re: How did you guys install your roof vents ?

Don't use pressure treated wood for fillers!

That stuff is CORROSIVE, due to the chemicals used for the preservatives. The manufacturers only recommend using double-dipped galvy, stainless steel, or ceramic-coated fasteners.

The PT made nowadays will eat your steel bus roof.

Regular 2x stock will do a good job. Apply a good sealant BEFORE installing the roof vents, that way they sit in the sealant and squish the joints full, guaranteeing a better seal.
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Old 04-20-2010, 07:18 PM   #8
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Re: How did you guys install your roof vents ?

I have a Elixir roof vent also. I was looking at it tonight and I noticed the part of the vent that protrudes down in the interior is 1". But the space in between the 2 roof skins is 1 3/4". So there would be a 3/4" gap between the lower ceiling skin and the vent.

Is it just the type of vent I have maybe? Or are they all pretty much the same.

Any pictures of installation of one of these vents?

Dan
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Old 04-21-2010, 08:27 PM   #9
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Re: How did you guys install your roof vents ?

Ok. Thanks Smitty.
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Old 04-21-2010, 09:13 PM   #10
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Re: How did you guys install your roof vents ?

I had a similar problem with an even bigger gap. I wound up using an extra inner trim ring and simply taped it to the other one. It was a different color so I also had to paint it white, but it worked out very well...







I have hundreds of images you could look through AT MY SITE and you're welcome to look through them, maybe you will find something useful there...
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