How To Install Vapor Barrier On Concrete Walls

You should then use fiberglass insulation that has a vapor barrier between the studs with the vapor barrier facing in toward the living space.

How to install vapor barrier on concrete walls.

Overlap any seams and tape them. 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. Using tape that is specially designed for this purpose. Cover the dirt crawlspace with a plastic moisture polyethylene vapor barrier.

A vapor barrier is also helpful to keeping a basement insulated and warm. To be extra certain use a caulk gun to place caulk material around the tape to double seal the barrier. Complete air blockage is essential to provide a satisfactory moisture barrier and will also maximize the wall s energy efficiency. Polyurethane sheeting is a typical vapor barrier that contractors use to prevent moisture from penetrating the walls of a basement.

Before attaching the vapor barrier to the wall it is essential that you wash the concrete to remove substances such as mold grease or sand. Up the wall and fasten it there. See below for more discussion on this. For rigid foam insulation installed as a combination.

Seal all wall cracks and holes in the wall being vapor proofed to block air gaps. Follow the instructions on the tsp when measuring ratios of water to tsp. If the subbase is sharp angular gravel a thin layer of sand can be placed on top of the gravel subbase next to the vapor barrier. Using other kinds of tape will compromise the waterproof seal and render the barrier useless.

Stake the plastic down with landscape fabric stakes to keep it in place. In general place the concrete slab directly on top of the vapor barrier with the subbase below. Add 12 inches to either dimension to ensure plenty of vapor barrier material if you choose polyethylene sheeting a plastic vapor barrier. Use special sealing tape to join sheets if polyethylene sheets are being used.

Use your tape to seal the seams of the vapor barrier. The material is stapled to the frame of a basement wall before it is finished with plaster or drywall. And bring the plastic about 6 in. The idea of framing basement walls against concrete only occurs if heyou belong to one of these.