Quality is worthwhile – and nowhere more so than for windows and external doors. Windows and doors need to impress users with more than just their durability. They are also responsible for delivering energy efficiency and comfort in the home. How can building contractors and architects be certain that they are installing high-quality products? How can manufacturers document the fact that norms for windows have been complied with? How can businesses demonstrate that the products have been finished and installed to a high standard? With the help of quality seals such as that of ift Rosenheim. Find out why the Institut für Fenstertechnik (Institute of Window Technology) has the last word in quality seals and how you can benefit from it in our Trending Topics.