Vapour Barrier In Garage Ceiling

I will not be heating in winter live in wisconsin so summers can be hot and winters can cold.

Vapour barrier in garage ceiling.

Do i need vapor barrier in ceiling. 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. I would like to insulate and drywall the walls. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.

The ceiling is not insulated and does not have vapor barrier installed. Unless you have converted your garage into a kitchen a bathroom a laundry room or a space that generates a lot of moisture even for that a dehumidifier can absorb all the moisture in the garage to keep the air dry. And the ceiling acts as a enough of a vapor retarder. If you re using old uninsulated doors pick up a retrofit kit that add insulating panels.

First of all a garage is not a signicant source of vapor as it is not occupied that much and you don t cook or bath in in it. Installing the vapour barrier in this type of insulated garage is a little different then normal. So you don t need a vapor barrier in the garage ceiling. Because you do not want to add a vapour barrier over the spray foamed area all you need to do is install one in the area that you did yourself.

Plastic vapor barriers should only be installed in vented attics in climates with more than 8 000 heating degree days. A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. The traditional way to insulate the walls and ceiling of a typical garage is to install fibreglass batt insulation in the walls and attic space followed by a six mil poly air vapour barrier and. Not every wall does.

If you re adding new garage doors be sure to install insulated options. Attached garage not finished except ceiling and walls adjacent to house.