Fachklinik (Specialist Clinic) Prinzregent Luitpold, Scheidegg, DE

Ceiling Refurbishment in the Listed KJF SpecialistClinic Prinzregent Luitpold in Scheidegg, Germany

The KJF specialist clinic Prinzregent Luitpold is picturesquely located in Scheidegg in the Bavarian-Swabian district of Lindau (Lake Constance), Germany. The children's sanatorium, built in 1912 and opened in 1916, was created with a donation from Prince Regent Luitpold and was intended to serve the recovery of city children "900 meters above sea level, in a wooded, windless location". The buildings are now listed under monumental protection.

The investor planned for a core refurbishment of the kitchen and dining area - actually while the clinic was still in operation and the school's classrooms above were being used for the patients.

Around 170 square metres of ceiling area in the main kitchen, scullery and cold storage rooms on the ground floor were enhanced. The aim was for the areas made of unreinforced tamped concrete to meet fire protection requirement F 90.

To do this, the specialist first removed the existing Rabitz ceiling. This revealed local defects or gravel nests in the vaulted concrete and old recesses or less compacted concrete, which had to be repaired at the same time. Contaminants and foreign bodies were also removed. The concrete surface of the tamped concrete cap ceiling was prepared to a roughness depth of > 1.0 millimetres by means of compressed air blasting with solid blasting media. The applicator then applied a layer of 4 centimetres of dry-mix sprayed mortar to the vaulted ceiling construction until the specified minimum component thickness of 10 centimetres was reached. At the same time, he repaired local defects in the vault structure. The surface remained coarse sprayed.

The team of experts opted for the StoConcrete Repair Prime TS 136 system to refurbish the vaulted ceilings. This was especially developed for low-modulus sub-base concretes from existing concrete classes. The existing concrete found was less strong because it had been compacted or tamped by hand in accordance with normal practices at the time of construction. The polymer-modified concrete repair product StoCrete TS 136 is applied using the dry-mix sprayed method. Low rebound, large layer thicknesses in one operation and the ability to be applied while the building is in operation without having to interrupt classes in the rooms above were other decisive properties.

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