Best Vapor Barrier For Garage Ceiling

The reasons go something like because you have to let the moisture escape or because the house has to breathe out the top what do the experts say.

Best vapor barrier for garage ceiling.

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 drywall. To know if you need a vapor retarder ask yourself a few basic questions. If you re adding new garage doors be sure to install insulated options. 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.

Consult building inspection offices for local recommendations. If you live in a cold climate place the vapor barrier between the interior of your home and the insulation. Install as directed typically cutting to fit and using a staple gun to attach the vapor barrier to the studs. So you don t need a vapor barrier in the garage ceiling.

Whether your vapor barrier is a facing or a film it must be placed on the warm in winter side of the wall. And the ceiling acts as a enough of a vapor retarder. 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. 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.

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. If you re using old uninsulated doors pick up a retrofit kit that add insulating panels. Insulating an attached garage has some special considerations that you must address differently then a unattached garage. Vapor barriers keep the air moisture in your house from condensing in the insulated cavities.

A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. I build in a cold climate where many longtime builders swear that you shouldn t put a ceiling vapor barrier in.