Block Wall Vapor Barrier
Cap the interior of the foundation wall with a 6 mil layer of plastic and galvanized flashing both to block moisture and to serve as a termite barrier.
Block wall vapor barrier. A vapor barrier s job is to keep water vapor in humid air from diffusing through one side of a wall and finding a cool surface inside the wall. Complete air blockage is essential to provide a satisfactory moisture barrier and will also maximize the wall s energy efficiency. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. Whether or not you need a vapor retarder hinges on three main factors.
By nature vapor travels from areas of higher concentrations to lower. A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. Since warmer air has more moisture vapor will move to. There is no sure solution for termites.
Not every wall does. Required tools for this polyethylene vapor barrier project. How to glue a vapor barrier to a cement block wall. Building codes may require different details for termite control in your region.
Seal all wall cracks and holes in the wall being vapor proofed to block air gaps.