Moisture Barrier Garage Ceiling

Ceiling vapor barriers are a bad idea because they keep water vapor trapped inside the garage according to home improvement expert tim carter.

Moisture barrier garage ceiling.

Omitting a ceiling vapor barrier by arguing that you have to let the moisture escape or because the house has to breathe out the top is actually correct in a way. Install as directed typically cutting to fit and using a staple gun to attach the vapor barrier to the studs. I will not be heating in winter live in wisconsin so summers can be hot and winters. And the ceiling acts as a enough of a vapor retarder.

So you don t need a vapor barrier in the garage ceiling. Use a vapor barrier. Thus installing vapor barriers on wall surfaces must. Water vapor can pass through building materials in several ways including direct transmission and by heat transfer but studies suggest that fully 98 percent of the moisture transfer through walls occurs through air gaps including cracks around electrical fixtures and outlets and gaps along baseboards.

A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. If you re using old uninsulated doors pick up a retrofit kit that add insulating panels. All attics vented or unvented should have an air barrier a properly detailed airtight drywall ceiling for example regardless of climate. 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.

If you re adding new garage doors be sure to install insulated options. It s also incorrect in a way. The ceiling is not insulated and does not have vapor barrier installed. Whether or not you need a vapor retarder hinges on three main factors your climate your home and the location of the wall you re insulating.

Wall vapor barriers on the other hand can prevent. Do i need vapor barrier in ceiling. Doing this will only trap water vapor inside your garage. Proper installation of a wall vapor barrier or using insulation products with a built in vapor barrier will reduce garage condensation a vapor barrier can also be used to cover the floor but avoid using it on garage ceilings.

I would like to insulate and drywall the walls. The science of moisture movement. Attached garage not finished except ceiling and walls adjacent to house.