Messtechnische Analyse flachgeneigter hölzerner Dachkonstruktionen mit Sparrenvolldämmung [Teil 2]

Measuring investigations of the hygrothermal behaviour of timber flat roofs — Part 2: Non-ventilated green roofs with cellulose and mineral wool insulation.

In the second part of this article serial the measuring values of two green roof elements made of mineral wool insulation with a moisture adaptive vapour retarder and cellulose insulation with a fibrous vapour redarder are discussed. It is shown that the roof surface temperature, beside the weathering conditions, depends on the level of plant coverage. Because of very low drying potential of green roofs high air humidity occurs in the cavity. This leads to higher material moisture content in the element with mineral wool insulation. The green roof element with cellulose insulation shows this higher material moisture content less pronounced. Despite high moisture loads in the cavities of both green roof elements no mould or rot could be found in the investigated roofs.