Essential factors, that lead to the improvement of the sound-protection-technical qualities with drywall construction, are named in the small summary. That improved sound-protection-technical solution must not always be the better construction for the respective application however. There are also the humidity behaviour, fire properties, or the aspects of the design. In the current technical leaflets of the system-suppliers of dry-modules and isolation, these sound-protection-technical rules are stocky for the respective application. It is recommended that this mature and proven systems.
In summary, the following principles:
Example of a subsequent improvement, for example, the step-sound a wooden ceiling beams by laying a floating dry streak plate, and a suspended ceiling. If, for example, the floor Sidebar without insulation directly on the floor plate up against the wall and pasted, the sound of this bar on the wall and thus in the apartment below.
Following the separation wall in the wooden ceiling beams with an additional ceiling, estimated LwR R ~ 58 dB for ; TW1 noise insulation; DB sealing strip under the UW-profile; TE Dry Streak.
There is still a fact to consider. A lightweight wall should not be next to the ceiling beams can be placed. Even if these intermediate wall itself is only a low weight, it leads to an additional burden on the ceiling section. What usually not observed when an interim wall, then usually on both sides furniture. It shall be a burden in the middle of the ceiling, which otherwise the string bars at the massive interior or exterior walls. By beams or strengthening of the ceiling beams can be a greater deflection. The problem is most often evident when the floor is tiled. There are then cracks in the port areas.
Simplified detection methods.
 Colling, Francois; Lernen aus Schäden im Holzbau, Deutsche Gesellschaft für Holzforschung Innovations- und Service GmbH, 2000, S. 241-243
 Schulze, Horst.; Informationsdienst Holz Teil 14 Umbau, Modernisierung, Folge 3 Nachträglicher Dachgeschossausbau, Entwicklungsgemeinschaft Holzbau in der DGfH, 1992 S. 21
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