Windows and functional doors must be maintained regularly to ensure their long-term functionality.
As a manufacturer of fire-resistant windows and fire-resistant doors, we provide samples that you are welcome to use for your own purposes. We have written an article on this topic for the B:Spezial issue 10/2020. The documents can be downloaded from our homepage or from the homepage of Bau- und Möbelschreiner at www.bm-online.de/wissen/bauelemente/muster-zur-unterstuetzung/.