How do you insulate an attic without a vapor barrier?

Once the insulation gets wet, it is difficult to dry it. Plastic or kraft paper sheets with vapor barriers keep water vapor out of the wall cavity, so the insulation stays dry. Not all types of insulation need a vapor barrier. But if it does, the barrier should face inward in warm northern climates and outward in humid southern climates.

Attic insulation

doesn't always need a vapor barrier, but if you live in a climate with colder winters, you may need to install one.

Unfortunately, you can't actually completely seal the attic, so you'll have to install a vapor barrier over the drywall of the ceiling. A vapor barrier can prevent moisture from accumulating in the attic insulation, preventing the insulation from being damaged. The saleswoman thought she had solved this problem by using roll-up insulation in the attic, with the paper backing resting against the boards. It would be difficult to insulate the interior with insulating panels on all sides because they would interfere with opening and closing the arms.

Vapor barriers aren't perfect, and you'll need to consider other factors before installing one in your attic. For some homeowners, hiring a professional to install an attic vapor barrier on a mezzanine floor or foundation wall means more peace of mind and savings in the future. A vapor barrier can protect attic insulation from getting wet and wet, but it's not always necessary. You should only install a vapor barrier on your attic insulation if you live in a climate with more than 8,000 degrees of heating per day.

However, if you live in a cold climate with moderate summers, your attic insulation will benefit from a retarder. They did an energy audit and they told me that I was also losing a lot of heat in the attic because I only had 19 blocks of insulation between 2 × 6 joists. Vapor barriers with low permeability prevent more water vapor from entering and are more effective at protecting attic insulation in longer climates cold. A vapor retarder prevents water vapor from settling on the attic insulation and will circulate it through the roof.

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