ROTHOBLAAS Traspir 150 (Breather Membrane) [BBA]The highly breathable membrane TRASPIR 150 optimises airtightness, limiting the uncontrolled passage of air and protecting the structure from the entry of hot draughts in summer and cold draughts in winter. Available with or without integrated tape and also in a 3 metre version. It consists of a microporous film and protective polypropylene layers and is designed for application on the external and internal sides of walls and roofs.