The new French regulation (RT 2012, fully operational since January 2013) requires that the building airtightness of all new residential buildings be justified. This has led to over 100 000 tests performed every year, and of course, pressure on designers and craftsmen to address this issue. Because building airtightness entails practical challenges difficult to understand only in theoretical courses, several initiatives have grown to teach professionals how to achieve good airtightness in practice on building parts (windows, wall interfaces, duct penetrations, etc.)… Read more