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Old 06-02-2009, 10:22 AM   #1
 
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Insullation


Good morning.

1. I have read many differnt things, but I have blown insulation in my attic. There is no vapor barrier between the drywall and the insulation. Should there be?

2. Can I seal gaps in the electrical boxes in the 2nd floor ceiling/attic floor, such as ceiling fan boxes and light fixtures?

Thanks for your help.
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Old 06-02-2009, 10:34 AM   #2
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Quote:
Originally Posted by Retirement View Post
Good morning.

1. I have read many differnt things, but I have blown insulation in my attic. There is no vapor barrier between the drywall and the insulation. Should there be?
No, at least not
if you live in the north.


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Originally Posted by Retirement View Post
2. Can I seal gaps in the electrical boxes in the 2nd floor ceiling/attic floor, such as ceiling fan boxes and light fixtures?

Thanks for your help.
Sure.
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Old 06-02-2009, 10:36 AM   #3
 
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Yes Northeast. Thank you for both.
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Old 06-02-2009, 04:07 PM   #4
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A vapor retarder keeps moisture from warm air from penetrating into insulation where it could condense. If you don't have a vapor retarder, it is not a grave issue unless you have some condition in your home that tends to increase the humidity level in the air. You can add a vapor retarder by painting the ceilings with a low perm primer. You should avoid adding extra moisture to the air un-necessarily as it will end up in the insulation or in the attic space. Make sure that you have good ventilation in your attic spaces as well. A vapor retarder is probably more important in the north where temps can drop in and out of the dew point range within the insulation layer itself.
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