vapor barrier

vapor barrier
noun Date: circa 1941 a layer of material (as roofing paper or polyethylene film) used to retard or prevent the absorption of moisture into a construction (as a wall or floor)

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Vapor barrier — 6 mil Polyethylene plastic sheet as vapor barrier between insulation and gypsum board …   Wikipedia

  • Vapor barrier —   A material with a permeance of one perm or less which provides resistance to the transmission of water vapor. [See California Code of Regulations, Title 24, Section 2 5302] …   Energy terms

  • vapor barrier — Thin plastic or metal foil sheet used in air conditioned structures to prevent water vapor from penetrating insulating material …   Dictionary of automotive terms

  • vapor barrier — Building Trades. a layer of material, as plastic film or foil, used to protect installed insulation by retarding the transmission of moisture from the interior environment. [1940 45] * * * …   Universalium

  • vapor barrier — noun : a layer of material (as of paint, building paper, or felt) used to retard or prevent the absorption of moisture (as into a wall or floor) and its subsequent condensation therein …   Useful english dictionary

  • Barrier — may refer to: * Automatic full barriers, railway * Barricade * Crash barrier, highway * Language barrier, culture/linguistics * Noise barrier, noise prevention * Road block * Separation barrier, prevents the movement of people across a certain… …   Wikipedia

  • vapor retarder — noun A layer of material or a laminate used to appreciably reduce the flow of water vapor into a roof assembly. Syn: vapor barrier …   Wiktionary

  • vapor seal — noun : vapor barrier …   Useful english dictionary

  • barrier — 01. The U.S. and Mexico are meeting today in an attempt to remove some [barriers] to trade between the two countries. 02. The police finally had to put up a [barrier] in the middle of the street in order to stop a teenager who had been speeding… …   Grammatical examples in English

  • Radiant barrier — Radiant barriers or reflective barriers work by reducing heat transfer by thermal radiation. All materials give off, or emit, energy by thermal radiation as a result of their temperature. The amount of energy emitted depends on the surface… …   Wikipedia

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