Measuring investigations of the hygrothermal behaviour of timber flat roofs - Part 1: Non-ventilated compact roofs with waterproofing membranes

Download the article from Bauphysik 03/2010 for free.

Bernd Nusser, Martin Teibinger, Thomas Bednar

For compact roofs with roof waterproofing membranes very high inner diffusion resistances are counterproductive. This kind of construction has virtually no drying potential. By the use of smart vapour retarders a higher diffusion based drying rate can be achieved. Five industrial manufactured, full scale low pitched and leakage free timber flat roofs with roof waterproofing membranes, different smart vapour retarders and inner sheetings were investigated under sun-exposed and fulltime shaded conditions.