How to insulate a wall against noise

You can hear every cough and especially the snoring from next door? No matter whether you want more noise protection inside your apartment or towards the neighbors - wall insulation can help a lot. By the way, you also achieve better heat management.

Effectively insulate a wall against noise

In the case of horizontal sound flow through walls, it is easier to achieve a high level of insulation compared to ceiling insulation. Because especially with partition walls within the apartment, you can apply the insulation on both sides - which is essential for more sound insulation efficiency. But even if you want more acoustic shielding from the neighboring apartment, insulation on both sides cannot be ruled out. After all, you can always talk to neighbors, who may benefit from it.

  • Also read - Retrofitting a wall for soundproofing wall
  • Also read - How the noise from an air source heat pump can be dampened
  • Also read - Insulate the wall to the neighbor

Effective sound insulation on the wall is composed as follows on both sides:

  • Insulating layer of dense material
  • one or two intent shuttures

Material and attachment of the insulation layer

For the insulating layer you use as sealing material as possible. Universal insulation panels made of less dense EPS are more suitable for thermal insulation than for a noticeable noise protection. Particularly suitable for soundproofing acoustic insulation ducts made of wood fibers, cellulose or polysterol. But also felt mats made of glass or wood wool are offered by specialist manufacturers.

In order to fix the insulation layer on the wall, first bring profiles made of wood of the metal to which they pinch the insulation material. But do not screw the profiles directly on the wall - otherwise they serve excellently as a sound transporter and pass vibrations directly to the other material layers. In order to decouple it from the wall, the ceiling and the floor, it is best to place insulating strips made of rubber, felt or mineral wool in between.

The cladding

You put a cladding over the insulation layer - not only for optical, but also for functional reasons. Because without solid cladding, even the thickest insulation layer is of little use.

You can use building boards for the cladding, for example made of simple plasterboard. Important: The cladding must also be decoupled from the other components. To do this, simply keep a distance of a few centimeters from the insulation layer or place sound-absorbing adjustable swing brackets in between.

If you put two cladding in front of each other, you can achieve an even higher level of sound insulation. With a 40 mm thick insulation layer and two 12.5 mm thick plasterboard cladding on both sides of the wall, a sound insulation value of 47 dB can result!