Installing Vapor Barrier In Garage

Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets.

Installing vapor barrier in garage.

If you live in climate zone 7 or 8 then it s a good idea to install a vapor barrier. While plain plastic sheeting is commonly used to make vapor barriers these traditional poly barriers will allow water and vapor to pass. 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. The science of moisture movement.

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. This is normally done because it s the most cost effective method to achieve the desired level of comfort and ease of installation. Not every wall does. With a little effort you can install this helpful device yourself.

Installing polyethylene poly to the warm side of a exterior wall is very important. How to install poly vapor barrier. Thus installing vapor barriers on wall surfaces must. In any case the vapor barrier must point to the warm side.

In summary you don t need a vapor barrier in a garage because there is not a lot of moisture in the garage. If you re adding new garage doors be sure to install insulated options. Vapour barrier is on the top of the rafter then insul then board if heating garage insul vapour then board need hatch for summer to let out hot air i m a insulator typar is a better product in a. This is generally referred to as installing vapour barrier because the main function is to stop the warm moist air in your home from entering the cold interior space inside of your wall cavity.

If you re using old uninsulated doors pick up a retrofit kit that add insulating panels. A vapor barrier can also increase your home s energy efficiency. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. Step 1 picking a vapor barrier.

You should rather pay more attention to air leakages in the garage than vapor diffusion through the walls.