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Old 12-28-2011, 09:16 AM   #1
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Drafty lights


Hello,
I have a lot of cold air falling from my recessed lights and bath exhaust fans. I can seal around the fixtures with caulking to slow the drafts, but what else do I need to do eliminate the draft from the attic to my living space?
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Old 12-28-2011, 09:43 AM   #2
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Drafty lights


You need to insulate from the attic side.


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Old 12-28-2011, 09:53 AM   #3
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Drafty lights


Also, you could check the exhaust ends of those ducts to be sure the one-way flap(s) is/are working properly. If they get stuck open, they'll allow a lot of air to move down into your home.

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Old 12-28-2011, 10:56 AM   #4
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Drafty lights


If the wrong llights were installed there going to leak air. They needed to be IC Air Tight. It should say so on the inside of the light if you remove the defuser on under the electrical connection box.
If it not an IC fixture you can start a fire by coving it up with foam or insulation.
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Old 12-28-2011, 12:53 PM   #5
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Drafty lights


If they are non-IC rated, a box constructed of fire rated gypsum is a great way to seal them up.

If they are in a bathroom, are they in a drop soffit area (i.e. bulkhead)? That is where we commonly see them and that entire drop soffit needs to be isolated out from the attic with some drywall and foam. No need to insulate inside the box once it is sealed off from the home.

Insulate over the top of the enclosed box at that point.

+1 to checking the flappers.
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Old 12-28-2011, 01:57 PM   #6
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http://www.capri.info/TechTopic/Capri/10.PDF

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