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Old 03-29-2007, 02:56 PM   #1
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Do you need to insulate behind soffit?


I am building a soffit that is against a wall that I will be insulating.


Do I bring the insulation all the way up from the bottom to the top plate or do I stop it where the soffit begins?

If I do, is it ok for the insulation to be near the ductwork when it will be enclosed? (Fire hazard?)



Thanks.
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Old 03-29-2007, 05:49 PM   #2
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Do you need to insulate behind soffit?


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Originally Posted by yummy mummy View Post
I am building a soffit that is against a wall that I will be insulating.

Do I bring the insulation all the way up from the bottom to the top plate or do I stop it where the soffit begins?

If I do, is it ok for the insulation to be near the ductwork when it will be enclosed? (Fire hazard?)

Thanks.
I would suggest that you just insulate the entire wall itself.
That will provide your heating envelope or conditioned space.
Then the soffit is simply some wood in front of the insulated wall and it does not require insulation.

...And, yes, you can insulate right up to ductwork...
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Old 03-29-2007, 06:59 PM   #3
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Do you need to insulate behind soffit?


Just so I have this straight.

If I insulate and put vapor barrier on the entire wall, then the heating duct will be close to the vapor barrier, and that's ok?
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Old 03-29-2007, 07:26 PM   #4
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Do you need to insulate behind soffit?


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Just so I have this straight.

If I insulate and put vapor barrier on the entire wall, then the heating duct will be close to the vapor barrier, and that's ok?

Yep. That heating duct is not going to heat up to any point of danger...It's just pushing out warm air....
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Old 03-29-2007, 07:41 PM   #5
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Do you need to insulate behind soffit?


Thank you atlantic.
You are a darling................

(Now if you can just give beer geek some lessons).

Just kidding beer geek. Don't get the panties in a knot.
I love you too......
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Old 03-29-2007, 09:11 PM   #6
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Do you need to insulate behind soffit?


There's something seriously wrong with you. Obsess much?
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Old 03-30-2007, 11:56 AM   #7
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Do you need to insulate behind soffit?


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There's something seriously wrong with you. Obsess much?

She said she loves you.
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Old 04-10-2007, 09:54 PM   #8
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Do you need to insulate behind soffit?


Quote:
Originally Posted by yummy mummy View Post
I am building a soffit that is against a wall that I will be insulating.


Do I bring the insulation all the way up from the bottom to the top plate or do I stop it where the soffit begins?

If I do, is it ok for the insulation to be near the ductwork when it will be enclosed? (Fire hazard?)



Thanks.
Depending on your local building codes, you might need fire blocking in the wall at the soffit.

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