“The Technology of Air Barriers: A Durability + Design Collection” Much of the presentation is on the testing that was done to prove that the installed systems would function as intended. System Assembly Performance Adhesion & Compatibility Component Movement CapabilityīEST 2010- Building Enclosure Science & Technology Conference presentation by Tremco on their Exoair Air / Vapor barrier components installed at two hospitals in the Mid West. A useful aspect of this presentation is the clear imagery of the mock-up wherein the components are identified and clearly shown. Oak Ridge National Laboratory tested eight types of air barriers to see where air passes through them so that they can be made to meet the requirements of IECC 2012. This article from the July, 2014 issue of Design + Durability Magazine compares “fluid-applied” air barriers, which are brushed, rolled or sprayed on sheathing or other substrates with those that adhere to the underlying surface with an integral, pressure sensitive adhesive. General Information on Air and Vapor Barriers A comparison of fluid applied and self adhered air barriers Scroll to zoom in on the 3D model and drag to orbit about it. Insulated wall assembly with air and water barrier intended to meet International Energy Conservation Code. Currently (2016) the ABAA lists twelve states and the District of Columbia as government authorities with air barrier requirements in their building codes. The International Energy Conservation Code (IECC) includes requirements for air exchange between the inside and outside of buildings that can only be achieved with effective air barriers. Air barriers serve to wrap the building shell and protect the building elements within it from the effects of air leakage. Air barriers are also sometimes used to separate building sections from each other. Queen Theater, Wilmington, Delaware during demolition phase of the renovation (photo © JVS Building Services, LLC & Rob Crimmins)Īir barrier systems include multiple materials, such as building wraps and sealants, and components, including windows, that seal the building enclosure, which includes all six sides of the building. Envelope components that serve that function range from concrete panels and reflective surfaces to thermal breaks and insulation. With the air comes water vapor, another component of the atmosphere that the envelope design must accommodate.įinally, the envelope needs to serve as the primary means of controlling the inside temperature. Windows and skylights that can be opened and closed are perhaps the most obvious examples of envelope components that can be used to control air flow in and out of the building. The building envelope also serves to control air flow. That is accomplished with “perfect barriers”, such as roofs, rainscreens and wall systems that resist and/or redirect rainwater, walls that store rain water that isn’t shed or redirected, which is how massive stone structures function, and below grade waterproofing. Resisting rain and controlling its flow off and away from the building is a fundamental function of the building envelope. Finish of the outside and some inside surfaces Control of the flow of matter and energy, which is done with both active and passive means.ģ. The numerous functions the envelope serves can be broken down into three categories:ġ. It isolates the occupants and other sensitive and valuable items inside the building from the elements. The building envelope includes the surfaces and components that provide the physical separation between the conditioned, inside space and the unconditioned, outside environment.
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