![]() The building envelope permeability rate is a measure of the amount of air that “permeates” through gaps, cracks and large holes in the building envelope when driven by an external force such as the wind, a poorly balanced air conditioning system or the thermal stack effect (Chimney effect). Air leakage testing with Blower door testing.Īir leakage testing otherwise known as Blower Door Testing or fan pressurization testing allows us to test a building for air tightness scientifically, and produce a number which can be used to compare buildings, build quality. This is not a solution, and you should seek an experienced contractors advice who specializes in air tightness and the integrity of the building envelope. Some people assume that the airtightness layer is from the false ceiling, and some contractors may try to caulk ceiling tiles in, to improve the airtightness of the building envelope. The Air barrier and thermal barrier need to be thoroughly and consistently in contact with each other. ![]()
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