Garage Attic Insulation Vapor Barrier

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.

Garage attic insulation vapor barrier.

The classic answer is that the vapor barrier goes on the warm in winter side of the assembly. Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. If you are not sure if you need insulation in your walls follow along with this flow chart. Not every wall does.

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. The facing on faced insulation acts as a vapor retarder. If you need a vapor barrier and your insulation is unfaced you must cover it with a polyethylene film. In mixed climate areas the vapor barrier is optional depending on the total design of a building.

Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. Your first job after the studs are in place is to fill those walls with insulation. You don t mention whether there is a bonus room or living space above the garage. The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below.

This acts as a barrier to keep heated moist air from rising up into the attic during cold weather.