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Old 02-15-2009, 06:09 PM   #1
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How should I seal Louver Vents no Longer being used?


Hi,

Does anyone have any suggestions on how I should go about sealing up some louvers I no longer use. These louvers were cut into the ceiling directly below the attic so I want to ensure I have a nice airtight seal so no warm air makes its way into the attic space.

So what I did on one of the louvers as a test was to stuff insulation between the insulation in the attic floor and left about 2 inches from the opening. I then filled the opening with Great stuff foam insulation (the red can) http://greatstuff.dow.com/greatstuff/diy/why.htm. I'll sand it down so it's flush with the ceiling.



Then what I'm going to do is stick one of those mesh drywall patch kits to the ceiling and plaster over it. Because they are textured ceilings, it will be obvious that there is patch work there, so for now I'll simply screw the louver back into the ceiling, then seal around it and the screw holes with clear silicone...





My one concern is the toxicity of this product. Could the vapors, even though its cured, pass through the drywall compound? (I'm using CGC).

Is all, or some of this simply overkill? Could I achieve the same results with something a little less messy to work with? Like maybe some foamboard? I just want to ensure a tight seal between my attic and my living space.

Thanks all.
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Old 02-15-2009, 06:34 PM   #2
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How should I seal Louver Vents no Longer being used?


i wouldnt use silicone,use a interior latex
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Old 02-15-2009, 06:38 PM   #3
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How should I seal Louver Vents no Longer being used?


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Originally Posted by strublesiding@optonline.n View Post
i wouldnt use silicone,use a interior latex

Ok, thanks for the tip...
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Old 02-15-2009, 09:05 PM   #4
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How should I seal Louver Vents no Longer being used?


You have a Monster in there.
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Old 02-16-2009, 06:54 AM   #5
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How should I seal Louver Vents no Longer being used?


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You have a Monster in there.


I had to lean into the monitor to figure out what you were talking about... It does look like a face doesn't it....That's awesome...!

So is it ok to use this stuff for this sort of thing?
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Old 02-17-2009, 01:54 AM   #6
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How should I seal Louver Vents no Longer being used?


Glad you liked it.
Great Stuff doesn't sand very easily. I would put a bucket on a ladder to catch the crumbs, then with a loose hacksaw blade held by the ends with both hands, bow slightly and saw off the offending Monster.

Your plan should work OK
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Old 02-17-2009, 05:20 AM   #7
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How should I seal Louver Vents no Longer being used?


or a long, serrated edge, thin bread knife. agreed......sanding won't work well.....
you see a monster, but not the girl in the cow? weird.... lol

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Old 02-17-2009, 05:50 AM   #8
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How should I seal Louver Vents no Longer being used?


Trim with a drywall rasp works well. great stuff is terrible stuff. Hilti foam dries harder and is more controllable with the expansion rate.
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Old 02-17-2009, 08:25 AM   #9
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How should I seal Louver Vents no Longer being used?


Thanks for all the tips guys... they helped me out bigtime...

I did the loose hacksaw trick and worked awesome!!!

@Bob Mariani I agree, it was really hard to control the expansion rate...I had a tough time with this stuff...

So the toxicity of this stuff should not be an issue once I patch it up with drywall compound?
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Old 02-17-2009, 08:27 AM   #10
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How should I seal Louver Vents no Longer being used?


if you burn you house down, just do not stay in the fire inhaling the fumes and you should be fine.
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Old 02-18-2009, 08:32 AM   #11
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How should I seal Louver Vents no Longer being used?


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if you burn you house down, just do not stay in the fire inhaling the fumes and you should be fine.
So if I stay in the hall while its burning, I should be ok then?
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