A tight home is a high performance home
AIR LEAKAGE, also called infiltration, is the unintentional seepage of outside air into a building, typically through cracks in the building envelope. In the summer, infiltration can bring humid outdoor air into the building, severely diminishing the efficiency of your HVAC. In the winter, this can result in warm, moist indoor air moving through cold envelope cavities. Condensation then occurs within in the structure, resulting in mold or rot.