Town Hall Bergrheinfeld
During opening hours
Förderpreis der Unterfränkischen Kulturstiftung des Bezirk Unterfranken zur Erhaltung historischer Bausubstanz 2020
State of repair
Aim of retrofit
Architektur + Ingenieurbüro Perleth
Kornmarkt 17, 97421 Schweinfurt
Ingenieurbüro Ralf Geyer
Raiffeisenstraße 1, 97526 Sennfeld
Elektroplaner: Ingenieurbüro Bopp GmbH
Am Sand 3a, 97422 Schweinfurt
Upper floor: half-timbered construction
Groundfloor: brick masonry
The exposed wooden structure including the clay building materials processed in between were preserved. Only a thermal insulation plaster was applied from the inside and the interior facade was re-plastered.
The fact that the energetic refurbishment was carried out from the inside meant that the truss construction visible on the outside could be preserved and at the same time the energetic requirements could be met.
The solid brick masonry was preserved. Only a thermal insulation plaster was applied from the inside and the interior facade was replastered.
In order to be able to guarantee a new continuous thermal envelope, the energy renovation was also carried out on the inside of the wall structure on the first floor.
The large-format glazed windows from the 1968 renovation were removed and replaced with new windows based on the historic model. A modern tilt and turn fitting was deliberately omitted in order to keep the cross-sectional areas of the profiles as small as possible according to the historical model. When selecting the wood, the decision was made in favor of durable eucalyptus from an FSC plantation in Spain. Eucalyptus wood is also cheaper than local oak or larch, so the decision was also made for monetary reasons.
The windows from 1968 had no relation to the historic model and were therefore not worth preserving in terms of historic preservation.
The roof truss of the cripple hipped roof was preserved and only re-roofed with red plain tiles. However, the roof cladding does not serve as a thermal envelope, but this function is assumed by the ceiling to the attic (compare build-up).
In the uninsulated attic of the town hall, the new ventilation system with heat recovery was installed as part of the renovation.
The floor slab between the heated first floor and the cold basement vault was also thermally upgraded, even though it only has a partial basement. The existing concrete ceiling was extended in the area of the former basement access. In addition, the structure, which is to serve as a thermal envelope, received a new floor structure including new insulation level.
The floor slab continues to fulfill its load-bearing function in the course of the refurbishment, which is why it only needs to be upgraded in terms of today's energy requirements.
A pellet heating system was installed for the base load and a gas condensing boiler system for additional demand. In the future, this central system, which was placed in the elementary school, will supply the town hall including the annex, the elementary school and the library. The heating can be controlled via the room thermostats.
The former central ventilation system in the library was repositioned and replaced in the course of the renovation in the attic of the town hall. The new system is a central ventilation system with controlled supply / exhaust air, which is CO2 and humidity controlled and supports heat recovery. It takes care of the town hall as well as the school and the library.
A refrigeration device was also installed in the attic.
Voluntary certificates: No
Primary Energy 105,39 kWh/m2.y
Consumption_estimation_After: 54,88 kWh/m2.y
Consumption_estimation_Before: 196,88 kWh/m2.y
Consumption_estimation_After: 105,39 kWh/m2.y
Amount includes: The total investment costs include both the historical and energy renovation of the old building as well as the entire new construction.