An air barrier stops air from moving in or out of the conditioned space, effectively blocking the air pressure differences that drive the stack and wind effects. Air barriers can be in place anywhere in the building envelope, and there can be more than one air barrier. Air barriers can...
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QUICK PRIMER: Thermal Bridging, Dew Points, and Exterior Insulation/Air Barriers
Shawna HendersonDecember 17, 2014
Insulated sheathing materials can provide an air barrier along with a thermal barrier, and solve the biggest challenges of thermal bridging. The challenge of using insulating sheathing as an air barrier is to ensure that the R-value of the sheathing is high enough that it moves the dew point outside...