Cutting-edge sealing technology (EnEV)
In Germany, the regulations go further, requiring compliance with the latest technology (EnEV).
"Buildings should be constructed in such a way that the heat-transmitting surface area, including joints, is sealed in accordance with the state of the art so as to be durably impermeable to air."(Energy Saving Regulation)
The air tightness of the building envelope saves energy for heating and prevents serious structural damage. Moreover, it increases the comfort and cosiness of the building and its value to the user.
An air tightness concept for the whole building needs to be developed during the planning stage. The physics of construction means that the air-tight layer should always be constructed on the inside to prevent penetration of warm moist internal air into the building component.