Question: Should You Put Plastic Over Insulation?

Can you leave fiberglass insulation exposed?

“Fiberglass insulation should never be left exposed in an occupied area, according to the American Lung Association,” says ALA’s Godfrey.

“Exposed fiberglass insulation, once in the air, does cause respiratory reactions, such as dry, scratchy throat and coughing, as well as acting as a skin and eye irritant..

Do you put insulation behind shower walls?

The insulation behind the tub or shower should be equivalent to the insulation in the rest of the exterior walls and should be covered with an air barrier of cement backer board, rigid foam insulation, or non-paper-faced drywall that is sealed at the edges and seams to provide a continuous air seal.

Is 6 mil plastic good for crawl space?

It may meet code in some areas, for several reasons, the attributes of 6-mil poly are not sufficient for crawl space encapsulation. Most of the 6-mil poly, or polyethylene, plastics (commonly referred to as Visqueen) you find at your local hardware store are comprised of post-consumer recycled materials.

Do you need to put 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.

Can you cover fiberglass insulation with plastic?

Fiberglass insulation will not degrade unless exposed to water. The fiber could become airborne if a vent is blowing on it or it is disturbed in some way. It can be covered with a plastic vapor barrier to protect your home air quality. … The plastic can be bought at any big box store.

What happens if you don’t use vapor barrier?

You may find that vapour barriers are often not required in warmer climates. And, if installed in the wrong climate or on the wrong side of building materials, a vapour barrier can cause more harm than good. This circumstance may prevent water vapour from drying, which in turn can cause rot and mold. (Source: Dupont.)

Should I remove old vapor barrier?

Ideally, you would remove the torn plastic. … When you can’t remove the old plastic, you can go ahead and cover it. Just be sure it doesn’t lead to too much excess material for the replacement. When you install a vapor barrier that has wrinkles or raised portions it is more vulnerable to tears.

Is it OK to touch insulation?

Even if you are not touching the insulation, it can send particles into the air that can irritate the skin. Lung irritation – Even more concerning, fiberglass, if breathed, will irritate the lungs, creating serious respiratory risks. … They may touch the fiberglass and increase their risk of problems.

Do you need to cover insulation?

Is Exposed Insulation Unhealthy? … In this case, even if you don’t plan on completely finishing the basement, you should cover the exposed fiberglass insulation for safety reasons, including: Disturbing fiberglass insulation can send particles into the air that act as lung, eye, and skin irritants.

Can you put plastic over insulation in attic?

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.

Can you cover attic insulation with plywood?

Once the insulation is down, you can turn your attic into valuable storage space by covering the floor with plywood. It will also make the attic a safer place in which to walk.

Is Tyvek a vapor barrier?

No, DuPont™ Tyvek® is not a vapor barrier. It is made with unique material science to keep air and bulk water out while allowing moisture vapor inside walls to escape.

Can you use plastic sheeting as a vapor barrier?

In simple terms, a vapor barrier is a material that won’t allow moisture to pass through it, such as plastic sheeting. … It’s designed to stop the moisture before it can enter the wall cavities. There are two basic types of vapor barriers used with exterior wall insulation. The most common is paper-faced insulation.

Where should vapor barrier be placed?

Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions: the inner surface in colder climates and the outer surface in hot, humid climates. In existing spaces, oil-based paints or vapor-barrier latex paints offer an effective moisture barrier.

What kind of plastic goes under a house?

polyethylene plasticHowever, for most homeowners sheeting made of polyethylene plastic is the best choice for moisture abatement and storage protection. While some sources may recommend a thickness of six-mil, a thicker grade of material is preferable.

How bad is insulation for your lungs?

The nature of the insulation means its fibres can come loose and stick to your skin, and to your nose, mouth and eyes. It can also irritate your lungs if you inhale a lot of it, causing coughing and discomfort for a couple of days after.

Can you use bubble wrap as insulation?

Bubble Wrap: The simplest and easiest way of adding shed insulation is Bubble Wrap. Bubble Wrap can be found in large quantity’s at any DIY/Hardware Store and isn’t expensive at all. You can even purchase foil backed Bubble Wrap which adds even more insulation. It works by trapping heat due to the air bubbles.

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 put plastic over insulation before drywall?

Without poly beneath the drywall, water vapor hits the drywall and diffuses through to the drier (in summer) indoor air. By installing a sheet of poly there, you cut off that drying mechanism and water that finds its way into walls can stay there longer and do more damage.

Do vapor barriers cause mold?

The Problem With Vapor Barriers 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. These wetting cycles can be from air flow, window leaks, pressure imbalances, and a host of lifestyle issues.

Do you have to cover insulation with drywall?

Drywall is a fire proofing. … If the garage is attached to the house and the insulation is between the garage and the house it needs to be covered with fireproof drywall. All other walls are NOT in violation. The only way the fiberglass particles become air-born is when the fiberglass is moved.