Through the crossways bonded layer construction evolves, from an acoustical point of view, light and at the same time bending resistant elements. In order to also achieve good airborne sound insulation values for thin cross laminated timber wall constructions predominately two or multi shelled structures are used. In connection with this, primarily, flexible shells which at the same time can serve as installation planes come into use.
To achieve the required footfall sound insulation according to DIN 4109, through constructive measures, the direct structure borne sound transmission via the massive construction components through isolation of the sound input on the floor's upper surface from the radiating surface on the underside is minimised.
Through a combination of upper surface screed and footfall sound insulating matting with a lower dynamic stiffness as well as with heavy and flexible floor coverings for the underside or filling finish intergrated into the element, a very good footfall sound insulation for the cross laminated timber element is achieved, with which the increased sound insulation requirements, according to DIN 4109, can be exceeded. Exceeds the minimum requirements of the standard. To minimise sound bridges in the connecting areas, elastic supports for the precast floor section are used, which contributes to the further improvement of the sound insulation between the usable units.
You can find evaluated constructional systems in the technical documentation of the member companies.