Cavity filling
An cavity is the open space between two parts of a construction, such as an inner and outer wall. This space is often filled with thermal insulation material but is also very suitable for reducing sound transmission. By filling the cavity with the right material, you improve the sound insulation of the entire structure.
Why does cavity filling help against noise?
A cavity wall already contributes to sound insulation because sound weakens as it travels further. Filling this space with insulating material makes the sound even more effectively damped. This is because the material provides additional resistance against sound waves. Cavity filling can be applied in various constructions with a cavity, such as walls, floors, and ceilings. It also contributes to the insulation of air and impact noise in DIY solutions like partition walls or floating floors. For optimal results, it is recommended to fill at least 70% of the cavity evenly.