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In this manner, the vapor barrier (in this case made of foil/scrim/kraft paper, called ASJ, all-service jacket, aluminium on the inside, white paper on the outside) can remain intact as it penetrates the fire barrier. A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists ...
Open-cell foam is porous, allowing water vapor and liquid water to penetrate the insulation. Closed-cell foam is non-porous, and not moisture-penetrable, thereby effectively forming a semi-permeable vapor barrier. (N.B., vapor barriers are usually required by the Building Codes, regardless of the type of insulation used.
Housewrap functions as a weather-resistant barrier, preventing rain or other forms of moisture from getting into the wall assembly while allowing water vapor to pass to the exterior. If moisture from either direction is allowed to build up within stud or cavity walls, mold and rot can set in and fiberglass or cellulose insulation will lose its ...
In order to achieve these objectives, all building enclosure systems must include a solid structure, a drainage plane, an air barrier, a thermal barrier, and may include a vapor barrier. Moisture control (e.g. damp proofing) is essential in all climates, but cold climates and hot-humid climates are especially demanding. [8]
Hohmann & Barnard, Inc. ("H & B") is the world's largest manufacturer of reinforcing products, anchoring and flashing systems, vapor barriers and restoration products for masonry construction.
A vapor-permeable building wrap on the outside of the original wall helps keep the wind out and allows the wall assembly to dry to the exterior. Asphalt felt and other products, such as porous polymer-based products, are available for this purpose and usually double as the water-resistant barrier/drainage plane.
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