DOORS EQUIPMENT DESIGN TECHNOLOGY COMPANIES CONTACT WE FOR YOU KÖSTER Aluminum, a medium-sized company based in Iserlohn ( North Rhine-Westphalia), is a quality manufacturer of aluminum house doors and windows. The company was founded in 2000 and is now one of the top 3 providers in Germany. 180 employees at two locations ensure that every customer receives their individual dream door on time. The aspects of customer satisfaction, design, energy efficiency, security and comfort are at the center of our daily work. advisory You can obtain competent advice and answers to your questions from your local specialist dealer. more… Locations We manufacture your individual front door with over 180 employees at two locations. more... Examples of doors Here you can see examples of KÖSTER house doors with a wide variety of house facades more ... PARTNER LOGIN E-mail address password Forgot your password? Dealer registration ... Product overview front doors All KÖSTER front doors at a glance. more... © 2021 | Köster Aluminum GmbH & Co. KG | Hansaallee 6–8 | 58636 Iserlohn | T: +49 2371 82050 | F: +49 2371 82052651 | info @ koester-aluminium.de NOTEPAD CONDITIONS IMPRINT DATA PROTECTION SITEMAP