EUROPE’S NO. 1 WINDOW BRAND Internorm has been a family business for 91 years, having developed from a one-man blacksmith‘s shop to the largest internationally active window brand.During this time we have manufactured over 27 million window and door units, all 100% made in our production facilities in Traun, Sarleinsbach and Lannach in Austria. From the creation of the UPVC window and the production of the timber-aluminium window to today‘s high-tech and ultra-modern design innovations, our family company has been setting standards all across Europe. We are pioneers in our field and continue to further develop technology and innovative ideas.