Garage Attic Insulation Vapor Barrier

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.

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. In cold climates a vapor barrier is almost always needed. Your first job after the studs are in place is to fill those walls with insulation. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.

Not every wall does. If you are not sure if you need insulation in your walls follow along with this flow chart. 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.

You don t mention whether there is a bonus room or living space above the garage. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. The classic answer is that the vapor barrier goes on the warm in winter side of the assembly. This acts as a barrier to keep heated moist air from rising up into the attic during cold weather.

In mixed climate areas the vapor barrier is optional depending on the total design of a building.