Definitions for "Vapour Barrier"
In kiln drying, a material with high resistance to vapour movement that is applied to the surfaces of a dry kiln to prevent moisture migration.
Is a continuous membrane in a building enclosure (i.e. wall or roof assembly) designed to prevent the migration of moisture from inside the building out through the enclosure. In an insulated assembly the control of moisture is important to stop condensation from building up in the wall or roof cavity.
a construction material impervious to the flow of moisture and air. Used to prevent condensation around insulation in buildings.