These results can be used to compare the relative airtightness of similar buildings determine airtightness improvements from retrofit measures applied to an existing building and predict air leakage.
Building air leakage test results.
Building testing is not a mandatory test prescribed in building codes but a performance based option that many designers are requiring.
I ve worked on day long air sealing jobs that yielded anywhere between 10 frustrating to 30 satisfying reduction in air leakage.
In essence it is a measure of heat loss through cold draughts.
Water 1 57 lb ft2 0 02 l s m2 under a pressure differential of 75 pa in accordance with.
The test measures air leakage rates through a building envelope under controlled pressurization and depressurization.
It s importanat to know what you ve achieved.
Testing the completed using both pressurization and building depressurization and documenting that the air leakage rate of the building thermal envelope does not exceed 0 25 cfm ft2 under a pressure differential of 0 3 in.
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These test methods produce results that characterize the airtightness of the building envelope.
With few exceptions new dwellings will require an air leakage test as part of the building control post construction sign off procedure.