Vapor barrier


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vapor barrier

[′vā·pər ‚bar·ē·ər]
(civil engineering)
A layer of material applied to the inner (warm) surface of a concrete wall or floor to prevent absorption and condensation of moisture.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Vapor barrier

Airtight skin of polyethylene of aluminum that prevents moisture from warm damp air in a building from passing into a colder space, causing condensation.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

vapor barrier

vapor barrier
SeeVapor retarder.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
A Superior Court judge initially granted summary judgment in All America's favor, deciding that the policy excluded coverage for any damage that resulted from the pierced vapor barrier.
Caption: FIGURE 1 (LEFT) "Wall Du Jour." 2 x 6 wall framed with oriented strand board (OSB) and a 6 mil polyethylene vapor barrier on the inside.
The 2-millimeter nanocomposite LDPE had better water vapor barrier properties at 23 C and 50% relative humidity than did the pure LDPE.
The rule-of-thumb model doesn't say when to change from placing the vapor barrier on the inside of the insulation to the outside of the insulation.
This capillary action is typically battled in new construction by the use of a vapor barrier beneath the concrete slab, with 4-6 inches of gravel beneath the gravel.
The inside block surface has vertical Furring strips at i6 inches on center with batt insulation between the furring, followed by a vapor barrier then covered with a 1/2 inch of drywall.
Exhibiting properties such as excellent stiffness and water vapor barrier, controlled gel levels and ease of processing, the new grade has been specifically designed for use as a blend partner in transparent coextruded film structures, conventional coextruded film structures or in monolayer film structures.
Techbarrier is a series of oriented films coated with SiOx to achieve oxygen and water vapor barrier properties approaching those of aluminum foil.
Installing the vapor barrier on the outside of the wall in Alaska results in warm air condensing its water against the exterior sheathing, resulting in rotting of the exterior wall.
Because of its high permeability, it does not act as a vapor barrier.
Recently, the increased use of slip plane materials has been reemphasized for various reasons: a method to monitor refractory wear; an impervious vapor barrier; and a layer to facilitate rapid lining removal systems.
They provide roofing and siding for barns, create a vapor barrier in a variety of agricultural buildings and stabilize muddy areas on farms.