How To Insulate Garage Ceiling Vapor Barrier

You can forego the plastic and use a vapor retarder kraft faced insulation or latex ceiling paint in all other climates except hot humid or hot dry climates.

How to insulate garage ceiling vapor barrier.

This garage is located in the north cascades 2000 elevation in washington state with a typical yearly temperature range of 0f 105f. If you re adding new garage doors be sure to install insulated options. A vapor barrier is a plastic or foil sheet that helps block moisture from collecting where you don t want it. When the house was built 10 years ago the walls attached to the house were done and the ceiling was drywalled fire code.

If you re using old uninsulated doors pick up a retrofit kit that add insulating panels. I live in mn and am insulating my garage ceiling in an attached garage. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter.

I m so confused about vapor barriers. In hot humid climates attics should not be vented and vapor. On the one hand i ve read about how air leakage is the main culprit of transporting moisture so i plan to air seal as best as i can with spray foam and caulk. I want to insulate the ceiling in my garage.

Without it mold and bacteria can form throughout the garage including inside of the insulation. The most important issue is that attached garages must have a system in place to keep carbon monoxide co from a running vehicle inside the garage from filtering through the walls and ceiling into the house. Insulating an attached garage has some special considerations that you must address differently then a unattached garage. I ve read the articles here and on other sites and it seems like i can t get a final decision.

Not every wall does. Once mold starts to grow you ll have to rip out everything and start over again. Plastic vapor barriers should only be installed in vented attics in climates with more than 8 000 heating degree days. How to insulate a garage ceiling.