Schallschutz von Holzbalkendecken - Planungshilfen für die Altbausanierung Teil 2: Flankenschalldämmung

Sound insulation of timber joist floors - design guidance for building refurbishment projects. Part 2: Flanking transmission.

The refurbishment of existing buildings plays an increasing role in the entire construction industry. If projected refurbishment actions are not subject to official listed building or monument requirements, then the relevant requirements will be those listed in the current building standards. The refurbishment of one particular structural element requires especially careful planning: the horizontal partition between apartments, which in old buildings often comprises a timber beam floor. There are major gaps in the current knowledge used to plan the acoustic properties of such floors, in both the standards and literature. In order to generate better planning data, an initial research project [1] investigating insulation against both airborne and impact sound was carried out for typical floor constructions in old buildings. Improvements to the acoustic insulation of such floors using a variety of refurbishment measures were tested under laboratory conditions, (not including flanking transmission). The results were published as Part 1 [2]. The present Part 2 describes the results of a subsequent research project [3] focused on investigating flanking transmission in various wall/floor combinations. The results are presented as planning data for flanking transmission in constructions within old buildings. An explanation is provided of how the calculation model compiled was applied, and how it was validated using measurements from old buildings.