What is air-tight construction?

"Air-tight construction" means a structure for which the entire building envelope is airtight.  

Using special systems, problem areas such as the roof, walls and façades  

and even windows and joints are sealed airtight.  

Not just for passive houses: a house's building envelope should be as airtight as possible.  

Airtightness creates many advantages for the quality of the building and quality of life.  

Advantages of air-tightness

• Avoid structural damage due to moisture penetration into building components.
• Improve the quality of living by reducing drafts.
• Increase sound insulation.
• Save energy by avoiding uncontrolled ventilation heat losses.
• Increase fire safety.