Air Leakage is a Big Deal

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Heat loss and moisture transfer caused by airflow can be eliminated by controlled air exchange, a.k.a. airtightness and balanced ventilation.

High air leakage rates can:

  • Decrease the effectiveness of insulation
  • Increase wear and tear on mechanical systems
  • Cause uncomfortable fluctuations in relative humidity indoors.


Careful attention must be paid to sealing potential air leakage points during construction:

Where does air leakage happen?