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Garage Insulation

Posted by claga (My Page) on
Wed, Jul 25, 12 at 14:32

We have a year old home in Massachusetts.
The builder only insulated the firewall between the living area of the home and the garage and the ceiling of the garage.
He did not insulate the other three exterior walls of the garage.
The garage is very warm during the summer and cold during the winter, which I think are adding to my heating and air conditioning cost.
The walls ceiling have wall board on them and are skim coat plastered.
I was wondering if it was possible to insulate the un-insulated walls without removing the existing wall board?

Follow-Up Postings:

RE: Garage Insulation

Unless you're using the garage as a workshop, there's little point in insulating it.

If you still want to go ahead, the most economical improvement would be to affix extruded polystyrene (XPS) or expanded polystyrene (EPS) boards to the wallboard; but you'll then have to add thermal protection on top of the foam boards.

If the room above your garage is uncomfortably cold in the winter and hot in the summer, the best remedy is to remove the drywall and existing insulation, then spray foam it and add drywall below.

RE: Garage Insulation

you can drill holes in the walls between each stud bay and blow in insulation...but would need to know more information on your home to see if its worth the expense. Your wall between the unheated garage should be insulated and treated like one of your exterior walls. If it is, then your unheated garage should have little impact on your home's heating bills.

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