Insulating Garage Ceiling

kendog2May 23, 2009

We live in Southern CA and have a two-car attached garage. The ceiling is dry-walled but not insulated. We use the space above the garage for storage. I am wondering if it would be worthwhile to add insulation in the ceiling. Would it make a difference in the temperature in the garage even if the garage door isn't insulated? I am not sure if the walls have insulattion.

I have blow-in and fiberglass R-11 rolled insulation. If we use the blow-in, I would want to put in no more than 4 to 6 inches to allow us to continue using this area for storage. Other options would be to use the fiberglass insulation on the floor or the ceiling. The ceiling is a sloped A-frame. I would appreciate any advice on the best type of insulation and where to put it. Thanks.

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Insulation will be of some help but it's hard to quantify the results, especially not knowing if the walls are insulated and having uninsulated doors. I would just fill the joist bays with appropriate thickness fiberglass batts. Don't compress the insulation, that greatly reduces its effectiveness.

    Bookmark   May 28, 2009 at 7:41AM
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Sounds like good advice. Maybe I will check to see if the walls are insulated. I didn't want to make a hole in the wall since it is a nice garage but I guess it is the only way to find out. Thank you for your response, Mike.

    Bookmark   May 29, 2009 at 10:17AM
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