Can You Put Plastic Over Insulation In Attic?

How long does insulation last in the attic?

80 to 100 yearsUnless damaged, it can last 80 to 100 years in most houses before it needs to be replaced.

However, insulation can start falling from fiberglass batts after 15 to 20 years, so if your insulation was installed in batts well over a decade ago, it might be time for an inspection or a home energy audit..

Can I cover my attic insulation with plywood?

You can lose a significant portion of the heat that your furnace produces through the roof if your attic isn’t insulated, and blowing in loose-fill material is one of the least troublesome ways to do it. … Once the insulation is down, you can turn your attic into valuable storage space by covering the floor with plywood.

Can you put plastic over insulation?

Without a moisture-proof material to protect the insulation and framing within the wall, hot and cold battle, moisture forms, and mold and rot take advantage of the result. Install an unbroken sheet of polyethylene vapor barrier to prevent it from happening.

How do you cover insulation in the attic?

Suggestions for covering exposed insulation include the following:Seal the insulation by stapling a polymembrane sheet over it.Install paneling or sheetrock over insulation located in the wall.Install plywood flooring over insulation located in the floor.More items…•

Do you need plastic over insulation?

Without a vapor barrier in place, condensation inside the walls could ruin the insulation and promote the growth of harmful mold and bacteria. Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier.

Do I need a vapor barrier over my 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. A vapor retarder is a material used to prevent water vapor from diffusing into the wall, ceiling or floor during the cold winter.

Should you remove old attic insulation?

Remove Old Insulation. Once there is no asbestos, mold, or rodents, it is generally safe to proceed with attic insulation removal yourself. … Luckily homeowners are more likely to find the easier kind which is blown-in fiberglass or cellulose insulation. Removing rolls or batting is a bit harder, but can be done.

Can you cover insulation with plastic?

4 Answers. Plastic isn’t recommended in this situation because it would create a second vapor barrier that can trap moisture and result in condensation and mold. Craft paper would have the same problem, this is what is most likely on the other side of the insulation for the vapor barrier you want.

Do vapor barriers cause mold?

The Problem With Vapor Barriers The original reason for using vapor barriers was a good one: to prevent wall and ceiling assemblies from getting wet. … This can lead to significant moisture problems and mold; problems occur when walls get wet during construction or more often throughout the home’s life.