Vapor barrier garage wall. Vapor barriers when to use them when to not. An actual vapor barrier should almost never be used. If your garage is 45 degrees and you have a bonus room heated to 72 degrees above the garage the vapor retarder faces the upstairs room. Whether or not you need a vapor retarder hinges on three main factors.
The goal of vapor barrier strategies is to prevent moisture from collecting and corrupting building materials. Between the house and garage wall you need 58 drywall to meat code with at least one coat of mudtape. Note that plywood is not a fire barrier. Not every wall does.
Insulating a garage vapour barrier yes or no. When a vapor barrier is on the side of a wall where the dry air is ie outside in winter or inside in summer moisture problems can occur. A vapor barriers job is to keep water vapor in humid air from diffusing through one side of a wall and finding a cool surface inside the wall. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.
Learn the easiest way to seal up an old house from drafts and keep your renovation from having moisture problems with a vapour barrier. Improperly installed a vapor barrier may actually trap moisture inside a wall while a wall that is more porous can breathe effectively and be less susceptible to long term moisture problems. A vapor barrier reduces the movement of water vapor by.