to energy efficiency are permanently growing. Heat insulation for roofs is taking up more space, which often goes at the expense of the ventilation system. Therefore [...] frame and acts – often for extended periods – as temporary roof covering, taking over the function of tiles. Therefore, the material has to be impermeable and [...] and placed as a film similar to a curtain between the material compound, taking over the function of a membrane and having to provide the necessary tightness
https://www.jowat.com/en-GB/newsroom-detail/breathable-and-extremely-durable-modern-adhesives-for-manufacturing-building-textiles/