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Old 09-14-2011, 12:09 AM   #1
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Insulation above a garage?


I have a ranch style house in the suburbs of Chicago with a three car garage. The attic space above the garage is not insulated. The garage gets very hot in the summer & very cold in the winter. The garage doors themselves are insulated & all of the garage walls are insulated. My question is will insulation help these issues & more importantly, what type of insulation should I use? Ex. Faced, unfaced, blown in fiberglass or cellulose only etc? Don't know if a faced batt can be installed after the fact?

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Old 09-14-2011, 01:49 AM   #2
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Insulation above a garage?


Blown in would be your best option, IMO. You can get a great R value for the price. You will def feel a difference!

What burb? I am in Naperville!

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Old 09-14-2011, 07:20 AM   #3
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Insulation above a garage?


It should help with the heat in summer, but it will still get cold in winter. I assume this ia a detached garage??
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Old 09-14-2011, 09:28 AM   #4
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Insulation above a garage?


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It should help with the heat in summer, but it will still get cold in winter. I assume this ia a detached garage??
If it keeps the heat out it will also keep the heat in.
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Old 09-14-2011, 11:08 AM   #5
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Insulation above a garage?


It's an attached garage & I live in Huntley, IL! So you think blown in is the way to go?
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Old 09-14-2011, 01:30 PM   #6
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Insulation above a garage?


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It's an attached garage & I live in Huntley, IL! So you think blown in is the way to go?
That's my vote. The only thing better would be spray foam, but I am not a fan. Once it is in, it is there to stay. Any remodeling or upgrading is a big pain. Also if there is no vapor barrier between the foam and drywall, replacing drywall becomes a nightmare. With a vapor barrier you can just remove the drywall, foam is on the other side of the VB and replace drywall as needed.
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Old 09-14-2011, 01:31 PM   #7
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Insulation above a garage?


If it is an attached garage you may want to consider sprayed foam to seal your home from the gas and carbon monoxide fumes your cars and other things can produce.
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Old 09-14-2011, 01:40 PM   #8
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Insulation above a garage?


Anything you can do to keep the gases from the garage entering the house is a good idea. But I think if you are not going to foam the entire garage, the ceiling isn't going to prevent much from entering the house. If gases do reach the attic, and you have proper attic ventilation, the gases will vent out the roof.

Seals on garage doors and any cracks in the drywall are the areas that gases are most likely to penetrate the home. Here is a great article on toxic gases in the garage.

http://garages.about.com/od/building...ir_quality.htm

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Old 09-14-2011, 02:29 PM   #9
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Insulation above a garage?


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It's an attached garage & I live in Huntley, IL! So you think blown in is the way to go?
You should also vent the attic space above. Any trapped super heated air will drive throught the insulation and add heat to the garage space. Adding insulation and a venting system will deal with the issue.
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Old 09-14-2011, 02:33 PM   #10
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You should also vent the attic space above. Any trapped super heated air will drive throught the insulation and add heat to the garage space. Adding insulation and a venting system will deal with the issue.

Good call, make sure it is properly vented.
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Old 09-14-2011, 11:00 PM   #11
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Insulation above a garage?


Thanks everyone for all the input-it is greatly appreciated!

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