- 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 . 2014.
Vapor barrier
Look at other dictionaries:
Vapor barrier — 6 mil Polyethylene plastic sheet as vapor barrier between insulation and gypsum board … Wikipedia
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 — 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
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
