Air tightness
Infiltration occurs when outside air enters a house uncontrollably through cracks and openings. Proper air tightening can significantly reduce heating and cooling costs and create a healthier indoor environment.
The recommended strategy in both new and old buildings is to reduce air leakage as much as possible and to provide controlled ventilation as needed.
Full air sealing in existing buildings is often not possible due to the fact that many of the leaks are integrated into the constructions. But several types of leakages can be fixed even in existing buildings by using products for tightening.
Proper air tightening can significantly reduce heating and cooling costs. On this picture the gap between the wall and the window has been sealed.
