Air Tightness affects your building performance


Everyone is talking about air tightness but only a few people know the meaning and the facts about complete building sealing:

  • Air Tightness is just one part of a proper building sealing
  • An efficient vapour control function is equally important
  • An additional external wind tight sealing should be created on the roof structure
  • An external water-tight sealing on the foundation level should be considered as well


The sense of a complete building sealing solution is, to protect your home against draught, dampness and heat-loss.

Modern houses nowadays mostly want to gain from the benefits of under floor heating, heat pumps and heat recovery ventilation. It is a fact, that these systems do not work in an efficient way, whenever the house does not provide a good value for air tightness.


The air change rate at 50Pa differential pressure (ACH@50Pa) should not exceed a value of 1.5. This means nothing else than the complete air in the building gets changed 1.5 times per hour through leakages in the building envelope, whenever a wind with a speed of roughly 36km/h is constantly blowing .


To save energy and ensure a controlled ventilation, it is absolutely essential to plan and create and monitor a full working air tight layer for your house.


prodomo Ireland is your competent and experienced partner to achieve the required air tightness level for your home. We do consultation, supply, monitoring, supply & installation and testing when it comes to air tightness.