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Old 06-25-2012, 05:39 PM   #1
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Blown in insulation


I am going to blow in insulation in the attic of a brick home built in 1957. There is no room to install baffles or rafter vents. The roof does have ridge vent and 2 roof vents. Also, there is a access door to the garage ceiling area which is not insulated which could be left open for air flow. . So.....What should I do for air flow? Do I need to worry about moisture or mold if I blow in insulation with no baffles? Thanks for any help you can give!!

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Old 06-26-2012, 06:44 AM   #2
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Blown in insulation


Where is the intake air coming from?

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Old 06-27-2012, 01:07 AM   #3
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Blown in insulation


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Do I need to worry about moisture or mold if I blow in insulation with no baffles?
Yes. If you have no ventilation, it may be better to spray foam the roof itself (inside) w/ closed cell foam and open that area up (air-wise) to the rest of the house. What is up in the area you want to insulate? Any A/C, etc? (What do the rest of you think about that?)
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Old 06-27-2012, 09:28 AM   #4
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Blown in insulation


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What do the rest of you think about that?
Spray foam makes me cringe...both at the $$ and the idea of EVER having to Renovate/Replace/Repair...

BUT, insulating the roof plane does alleviate some worries you (OP) seem to have...
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Old 06-27-2012, 11:31 AM   #5
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Blown in insulation


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Spray foam makes me cringe...both at the $$ and the idea of EVER having to Renovate/Replace/Repair...

BUT, insulating the roof plane does alleviate some worries you (OP) seem to have...
I hear ya, but it is commonly done, and what else can this cat do? Besides the concerns you mentioned, it is environmentally terrible.
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Old 06-27-2012, 11:25 PM   #6
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Blown in insulation


Where are you located?

Gary
P.S. Welcome to the forums, Randy!
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Old 06-30-2012, 11:02 AM   #7
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Blown in insulation


Foam makes me cringe in retrofit applications in general. If you go with it make sure they follow all the recommendations from the manufacturer. Inducing no storage, finding a place to stay for a few days and removal of all the existing insulation. http://www.demilecusa.com/homeowners...l/retrofit-faq
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Old 06-30-2012, 08:05 PM   #8
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Blown in insulation


There is also a retrofit roof vent you can have installed at the eaves. It fits under the shingles and allows air flow like a soffit vent. We have several roofing companies that use them on older homes in our area.

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