Basement Wall Insulation Vapor Barrier

If you have a framed wall that is adjacent to a concrete foundation wall where the vapor barrier is next to the drywall in front of the studs the fiberglass insulation gets wet and becomes a breeding ground for mold.

Basement wall insulation vapor barrier.

The builder insulated the upper 4ft of the basement wall with a pink batt style insulation which is held to the wall with a vapor barrier. It provides the best coverage and r value and and functions as a moisture barrier in and of itself. Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. In any case the vapor barrier must point to the warm side.

Also be sure to use treated lumber for the bottom plate on the wall framing. Basement remodeling ideas from tv. A vapor barrier is also helpful to keeping a basement insulated and warm. But if you use.

Whether or not you need a vapor retarder hinges on three main factors your climate your home and the location of the wall you re insulating. Concrete is like a huge sponge which holds water and water vapor for years and years. A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. The other option is to set the 2 4 wall framing in 4 from the masonry or concrete basement walls and use just the vapor barrier on the insulation facing toward the living space.

When the mold grows it will spread to everything around it studs drywall etc. Basement insulation vapor barriers the trick with basement insulation jobs is in understanding where water vapor is being stored and where it s moving to. Not every wall does. This will give you two vapor barriers one before and one after the stud wall framing.

The material is stapled to the frame of a basement wall before it is finished with plaster or drywall. The foam layer should be continuous and sealed at joints to keep indoor air away from the concrete. As the wall dries the water vapor leaves the concrete and tries to penetrate the insulation and wall. Polyurethane sheeting is a typical vapor barrier that contractors use to prevent moisture from penetrating the walls of a basement.

This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. The best option for insulating a basement is to use spray foam insulation. The construction of the wall for instance is vital to the use of a vapor barrier.