Protection from mould and heat loss

The air­proof­ing lay­er pro­tects the in­su­la­tion from mois­ture and con­dens­a­tion from the in­side, en­sures that the in­su­la­tion works ef­fect­ively and provides a healthy in­door liv­ing en­vir­on­ment.

The thermal in­su­la­tion sep­ar­ates the in­door from the out­door cli­mate. The tem­per­at­ure dif­fer­ence between the two cli­mates at­tempts to be­come equal­ised through the flow of air. This means in winter the warm air from the build­ing trans­fers through the struc­tur­al ele­ments to the out­side. The air­proof­ing lay­er pre­vents this air flow, the so-called con­vec­tion, and there­fore the loss of hot air to the out­side. The in­teri­or space is here not her­met­ic­ally sealed off - like us­ing a plastic bag - from the out­side air. In­stead, the ex­change of air from the in­side to the out­side con­tin­ues via dif­fu­sion.

If in­door air were to flow un­res­tric­ted through the thermal in­su­la­tion, it would in­creas­ingly be­come cool­er the farther it pen­et­rates to­wards the out­side un­til it fi­nally emerges as con­dens­a­tion. Con­dens­a­tion may cause con­sid­er­able dam­age to the build­ing and its com­pon­ents. Load-bear­ing struc­tur­al ele­ments may rot and lose their strength.

Sim­il­arly, mois­ture also pro­motes the de­vel­op­ment of harm­ful mil­dew and mould.

A va­pour re­tard­ing and and air­proof­ing lay­er on the in­side of the thermal in­su­la­tion helps to avoid such struc­tur­al dam­age.



Saving energy

Air­tight struc­tures are en­ergy ef­fi­cient. They en­sure that heat in­su­la­tion func­tions op­tim­ally. This re­duces heat­ing costs and CO2 emis­sions, pro­tect­ing the cli­mate and your wal­let alike.



Bauschaden vermeiden

Prevent structural damage

There is a risk of structural damage as a result of mould and rot, if moist indoor air in winter penetrates the thermal insulation structure and large amounts of condensation are produced. Airtight structures help prevent this.



Wohngesund leben

Healthy living spaces

Air sealing protects against mould, helps prevent dry air in the winter and keeps living spaces cool longer in the summer.