Warm airtight walls are the first link in the technological chain, the basis of the Passive House concept is the saving of thermal energy, which is easiest to implement thanks to well-chosen construction material and well-insulated external walls of the building. The heat transfer coefficient U for such a wall should be less than 0,15 W/(m² K). Implementation so rigorous, in terms of the thermal requirements of the structure, is based on new design standards. The concept of a thermal bridge in the building structure is redefined, it is no longer simply an uninsulated surface, but every element of the structure, which can lead to the loss of heat from inside the building. Particular attention when designing and constructing such walls, is applied to the sensitive places of the wall, such as window jambs, lintels, wreath insulation etc.. All for this, that they would not go to wasted materials and resources used to bring the building to the desired standard.

Comparison of selected types of walls