Freihof Sulz

The exterior walls, which did not have any plaster or paintings worthy of preservation on the inside, were insulated on the inside and a new plaster was applied. Except for two rooms, it was possible to install interior insulation in the plastered rooms everywhere. The rooms with interior wood panelling worth preserving were not insulated. The interior insulation was made with sustainable material wood fibre. To avoid possible later damage to the wooden beams in the natural stone masonry, the insulation thickness of the interior insulation had to be reduced on 6 cm. The insulation was pulled up over the ceiling. Where the ceiling was still ok, the edge area was cut open so that the insulation could be installed. The window reveals were insulated from the inside as shown in the picture on the left. The interior plaster was executed with lime.

The external appearance of the building was preserved, thus preserving the elements worthy of preservation. No interior insulation was applied to the interior panelling and paintings worthy of preservation, like the painting in the "Rosensaal"

On the ground floor, where possible, the well preserved cambered windows have been retained. These are box-type windows with curved panes on the outside, which both open inner wards. Inside there is normal single glazing.

Due to the protection of historical monuments and well preserved cambered windows, the decision was made to retain the box-type windows. Repaired and replaced using old wood material parts that were rotten, fell off or were infested with pests. New wood was used for large damaged areas. Holes were filled in, irregularities were sandpapered or puttyled. Old varnish was sanded off, the oil rubbed off with spirit. The windows were glazed out, the old putty was removed. With a special tool, only loose spots were sanded and then patched because otherwise, the paint would not have adhered. Afterwards, they puttied with linseed oil putty. The renewed glass was coated with a low-E coating. Partly the glass was re-glazed. In the listed rooms on the ground floor, the old cambered glass was used. The fittings were rubbed off and after a function check they were lubricated and set up. Windows were partly machined at the bottom with a planing machine to ensure tightness. Glazing was done without silicone, instead, oil glue putty was applied with a spatula. Weather shanks were removed and new ones made of larch wood were fitted. For sealing, sheep's wool was stuffed from the outside and grouted with acrylic. Inside, the carpenter sanded, puttyled and patched the frames and checked and reattached the fittings. In some cases, holes had to be drilled on the sides and the frames screwed to the masonry. Shutters are designed to match the sunlight. Depending on the floor, direction and use, the shutters are partly closed at the bottom and are equipped with fixed slats or adjustable slats for display. Shutters were partly in very bad condition. They were also repaired as described above.