Example of K-FONIK material used to increase the performance of sound insulation in a building complex.
The dividing wall was built out of aerated concrete brickwork. The materials applied for acoustic insulation are as follows:
> K-FLEX K-FONIK GK sheets – high density rubber soundproofing
> K-FLEX K-FONIK 160 sheets - soundproofing semi-open cellular material, made by compacting FEF flakes with the correct size and degree of compaction designed to achieve maximum performance of a wide frequency band.
K-FONIK GK sheets (high density rubber 3mm thick) are applied to the existing masonry wall, made ready with a thin layer of tile adhesive using a serrated trowel. Application is easy and requires no special skills apart from attention to detail and accuracy, especially where there is a junction with adjacent materials. Next a lightweight metallic frame is constructed, attached only to the ceiling and floor. The profiles of the metal structure are detached and simultaneously sealed with strips of K-FONIK GK. Please note that the K-FONIK GK strips must be wider than the profiles in order to enable plasterboard to be attached, avoiding contact with the floor and ceiling. The resulting structure is not acoustically separated from the masonry wall. The vertical metal profiles are placed every 40cm, which makes the whole structure relatively rigid. The empty space between the light profiles of the metal structure is filled with insulating material, so as to increase the soundproofing properties soundproofing and absorb a substantial portion of the sonic energy. A PE sheet is then applied to the metal structure and put together with a plasterboard counter wall. Note that there is an empty space between the plasterboard and ceiling/wall. This space (2mm) must be filled with acrylic silicone. The resulting structure promotes a significant increase in the performance of the acoustic insulation, thanks also to the specific installation technique, which enables the masonry wall to be effectively separated. The K-FONIK GK and K-FONIK 160 materials are integrated to improve the quality of the sound insulation. The consequent improvement in terms of sound insulation of the counter wall is equal to 8-10 decibels.