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 vapor into walls and prevent condensation within them Normally, polyethylene plastic sheeting is used
a component of construction which is impervious to the flow of moisture and air and is used to prevent condensation in walls and other locations of insulation
In kiln drying, a material with a high resistance to vapor movement that is applied to the inside wall and ceiling surfaces of a dry kiln to prevent moisture migration
Plastic film, building paper, paint, or other material used to retard flow of moisture Often applied after installation of insulating material to prevent moisture from entering the insulation and thus diminishing its effectiveness Some insulation incorporates its own vapor barrier
a ) A material, such as foil, plastic film or specially coated paper, with a high resistance to vapor movement, used to control condensation or prevent migration of moisture b ) Any material used to stop the migration of vapor through walls, floors or ceilings
A material or paint applied to a wall, floor or ceiling to prevent the passage of moisture Plastic vapor barriers are sometimes applied over the subarea soil This helps create a dry air space between damp soil and wood framing and limits the amount of moisture able to rise into the framing, thereby reducing moisture damage A plastic vapor barrier also provides a reasonable surface upon which to crawl in the event of needed access to a moist subarea Finally, a plastic vapor barrier tends to keep moist soil from drying out completely and reduces the subsequent shrinkage and cracking that often occurs This reduces the settlement often associated with expansive soil subject to fluctuating moisture content
Also called a vapor retarder, this is a material that retards the movement of water vapor through a building element (such as walls, floors, and ceilings) and prevents metals from corroding and insulation and structural wood from becoming damp
a material that severely limits the movement of water vapor (water in a gaseous state) from one side of the material to the other The relationship of this term to the term vapor retarder is complex and often indeterminate For a complete discussion and delineation of water and air, barriers and retarders, see Understanding the Terms Barrier and Retarder for Vapor and Air or Air barriers vs Vapor Barriers
Material used to retard the movement of water vapor into walls and prevent condensation in them Usually considered as having a perm value of less than 1 0 Applied separately over the warm side of exposed walls or as a part of batt or blanket insulation
-A waterproof material or film placed between a heated area of the home and an area that is not heated to prevent moisture from seeping between the two areas
Moisture resistant materials used to stop or slow the movement of moisture through a surface Often applied on the inside face of exterior walls to prevent condensation forming in interior living areas Examples are Tyvek and tar paper