Garage Attic Insulation Vapor Barrier

In reality insulation merely slows the transfer of heat through the insulated barrier wall ceiling floor etc.

Garage attic insulation vapor barrier.

Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. Not every wall does. Some regions don t require a vapor barrier.

Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. Whether your vapor barrier is a facing or a film it must be placed on the warm in winter side of the wall. There is a school of that maintains that an unheated garage that is attached to the house may get some benefit from insulating the walls and ceilings of the garage since it theoretically offers an additional thermal buffer. Vapor barriers keep the air moisture in your house from condensing in the insulated cavities.

On the other hand an air barrier a properly detailed air tight drywall ceiling for example in the absence of a vapor barrier can be effective since it stops the flow of vapor laden air. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. 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 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.

Over time this trapped moisture can rot the wood framing in your attic or cause mold and mildew to appear. Attic vapor barrier detail for cold climates the best approach for a vented attic in a cold climate is installing a layer of drywall with a good coat of latex paint the paint creates a semi permeable vapor barrier. In any case the vapor barrier must point to the warm side. If you live in a cold climate place the vapor barrier between the interior of your home and the insulation.