Vapour Barrier In Garage Ceiling

A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter.

Vapour barrier in garage ceiling. Do i need vapor barrier in ceiling. Not every wall does. In very cold climates the use of polyethylene plastic vapor barriers between insulation and interior wallboard may be beneficial provided all air gaps into any wall and ceiling cavities are also blocked. See installing vapour barrier.

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. I would like to insulate and drywall the walls. The ceiling is not insulated and does not have vapor barrier installed. 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.

Installing the vapour barrier in this type of insulated garage is a little different then normal. I will not be heating in winter live in wisconsin so summers can be hot and winters can cold. Install as directed typically cutting to fit and using a staple gun to attach the vapor barrier to the studs. Attached garage not finished except ceiling and walls adjacent to house.

If you re using old uninsulated doors pick up a retrofit kit that add insulating panels. And the ceiling acts as a enough of a vapor retarder. 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. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.

So you don t need a vapor barrier in the garage ceiling. 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.