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Jim Hart 11-11-2009 01:58 PM

Garage Insulation
When insulating an unheated garage should I use a vapor barrier? I will use kraft faced on the ceiling so I can staple it in place prior to hanging my drywall but what about the walls?

gregzoll 11-11-2009 02:38 PM

If it was me, I would go with the vapor barrier, since you never know when you may want to use for other stuff (ie Guy cave, studio, body work). The better you can keep the cold from coming in during the Winter, the better you can keep it heated if you have to work for more then a couple of hours in the space.

Gary in WA 11-11-2009 05:13 PM

I definitely would! That stops the warm, moist air from rising off the car and getting the new insulation wet. Be sure to ventilate the roof above the insulation. Drywall will only slow it down with a permeability of 40. I would also use one of the paints listed, to stop the water at the surface of the drywall:
Be safe, Gary

Jim Hart 11-12-2009 08:44 AM

Thanks for the advice. I'll use a vapor barrier, a good paint and yes, the attic is well ventilated.

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