Rebuilding Church St. Martha

The church St. Martha Kirche is sited in the center of Nuremberg, nearly hidden in the fabric of the city behind a gap between the townhouses of the Königstrasse. The church can be reached via a small forecourt. In the church room are now after the reconstruction diverse ecclesiastical, diaconal and non-church events possible. Further was the reconstruction of the organ loft, the choir room, the sacristy and the bell chair part of the construction task. From the outside the original materialitiy has been received (restoration oft he historic natural stone walls, new parts replace the building fabric lost due to the fire true to the original). Only the big tracery window at the west gable wall, that was irreparable damaged by the fire and the church portals give an indication of the redesign in the interior. There arise through the interaction oft he historical natural stone construction with the contemporary wood construction a new space, completed by a rammed earth floor.

From the start of planning the reconstruction of the church St. Martha Kirche was understood as a common project. Draft and execution planning were presented to the parishioners and decisions were made together. Static analyzes and monument conservation studies have been performed to find technically wellfounded reconstruction activities. To live up to the standard of the special acoustics of the originally church (the St. Martha Church was in the 16th century home for performances of the Nuremberger Meistersinger and until the fire place for frequent concerts) an acoustic simulation was carried out. Because of this simulation absorbent and reflective wall and ceiling elements could be fixed. So could be restored the originally existing, dry acoustics. The development of the indoor climate was carefully accompanied to ensure optimal conditions for the sensitive instruments (especially the organ). A tempering of the church room takes place over underfloor heating arranged in the floor structure. The energetic concept includes an improved standard of insulation. To this end all newly installed constructions were carried out insulated.

The natural stone constructions have been restored and remained otherwise unchanged. The reconstruction of the roof truss was build as a collar beam roof consisting of unglued solid wood. To the restored flat ceilings in the laterally church aisles is added a further flat ceiling in the main church aisles, replaces the originally barrel ceiling. The flat ceilings consists of diagonal board layers. They are linked with the roof structure of the roof truss and act as plates, that cause the longitudinal stiffening of the roof truss and the natural stone walls. These elements are acoustically effective and the insulation level is arranged in it. The roof itself is a cold roof. The floor consists of vapor permeable rammed earth, which was applied on the found historical floor covering over a mineral insulation layer. The windows were closed with large-formated fixed glazing, except of some small, necessary ventilation blades. For the glazing are used coated single glazing with improved insulation properties. The historic stained glass windows in the choir room were expanded at the time of the fire for restoration purposes. So they could be build in at the originally place.