For the past 75 years, R. Brunner AG has been your contact for all carpentry solutions. For some time now, we have also been active in the field of historical monument preservation. We developed our own unique fire protection insert, the "Historical Protector", which enables historically valuable doors to be upgraded to the EI30/60 classification required by fire protection regulations. In this way, we enable the preservation of valuable and protected building fabric. We also have the specialised expertise to reinforce Bauhaus-style doors with steel frames of architectural value.