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.
A material that prevents the passage of water or water vapour through it. Vinyl, plastic, aluminum foil, Kraft paper, asphalt felt, asbestos felt and a laminated combination of these materials are considered vapor barrier materials. French (Pare-vapeur)
A building product installed on exterior walls and ceilings under the drywall and on the warm side of the insulation. It is used to retard the movement of water vapour into walls and prevent condensation within them. Normally, polyethylene plastic sheeting is used.
The element in a wall, floor or ceiling that does not allow moisture or air to penetrate and is used to prevent condensation in insulation.
(mostly) A membrane which is placed between the insulation and the roof deck or wall lining to retard water vapour from entering the insulation (or cavity) and condensing into liquid water.