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MEEF - Middle East Economic Engineering - Articles  - Air Barriers  previous page

Air Barrier Components

Air barrier components are defined as the material or product which is used to connect different air barrier materials or assemblies together to make the air barrier continuous. Examples of air barrier components include materials used to connect the wall air barrier assembly to a window or door assembly, a roof assembly or a foundation assembly. They can also be used to connect two pieces of air barrier material together to produce an assembly.

The air permeance of these materials are tested in a similar way to an air barrier material but as they are normally used to bridge two different materials, the testing is done and report per length of a defined gap. The air permaeance of air barrier components are no greater than 0.02L/(s•m2) @ 75Pa. (0.004 cfm/ft2  @ 1.57 psf)

The testing is done on a wall specimen which has a window blank with gaps between the window blank and the wall and also has vertical and horizontal gaps in the wall materials.

The test assembly is configured as follows;

Air Barrier Materials, Components, Systems & Assemblies

Air Barrier Systems

An air barrier system is a system of building assemblies within the building enclosure—designed, installed and integrated in such a manner as to stop the uncontrolled flow of air into and out of the building enclosure.

Building Enclosure System

A system of building components and materials designed and installed in such a manner as to provide a barrier between the interior spaces in the building and the exterior environment. A building enclosure system is designed and constructed to provide protection of the interior environment in a building from the effects of weather; the intrusion of noise, pollutants, hazardous or deleterious conditions or materials and unwanted organisms. A building enclosure system also provides structural resistance to both natural and unnatural forces, as well as aesthetic value or qualities for the building


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