Soundproofing, also known as acoustic insulation or acoustic insulation, aims to minimize as much as possible the noise of the environment of a building, whether residential, commercial or industrial.

Your neighbor from the top often walks in her heels at home? Do your children like to listen to their loud music? You hear more and more cars passing near you? With increasing densification of the population, this kind of inconvenience is unfortunately more and more frequent. The noises generated by your environment can quickly compromise the quality of life in your home and generate disputes with your neighborhood. Studies have also shown that noise is an important source of stress and fatigue, which can lead to depression.

To effectively limit the propagation of sound, it is essential to know the origins of noise. We distinguish two types of noise:


  • Impact noises originate from shock or vibration on a structure, walls or floors. During the impact, the materials will vibrate and thus propagate the sound wave throughout the structure. These are the most complex noises to reduce, they are mainly generated by walking, moving and falling objects. These noises diminish with the addition of materials, such as resilient bars or insulation products.


  • Aerial noises, as the name suggests, spread with air but also with the vibration of structures. Inside, they are mainly generated by voice, television and radio, while outside, it will be urban life in the vicinity: road, air, rail and pedestrian traffic. Exposure to airborne noise will be increased by the presence of openings in the walls that provide air leakage and allow sound to pass through. It will make your walls waterproof to effectively soundproof your interior.


Soundproofing is an important part of the comfort of life, as can the quality of the air. The installation of better acoustic insulation will consist of limiting parallel air leaks and vibrations. In order to carry out the insulation work, we will take into account three aspects: mass, uncoupling and the drum effect.

We prefer insulation materials that have the highest mass, since the higher the insulating materials, the more insulating the material will be.
The decoupling will in turn reduce the propagation of the vibrations and thus the noise. The thickness of a credit card is sufficient to avoid solid contacts and wave diffusion.
The drum effect, also called acoustic reverberation, is a phenomenon of amplification of the sound waves in any cavity, which are themselves in the walls and structures. We will reduce this effect by injecting, for example, cellulose into the cavities between the joists.


In terms of soundproofing materials, we use:

  • Insulating wool, which is often used between adjoining walls, can also be used for interior partitions that separate the different rooms of the dwelling, such as a living room or a bedroom. Among the insulation wools, rock wool is an insulator of choice because of its high resistance to fire, water and mold. For a more economical product, we will opt for glass wool and reduced strength performance
  • Cellulose, blown into the walls to fill the cavities and avoid the drum effect is an ecological product and effective in insulating airborne noise.
  • The resilient bars which dissociate the materials from the structure, separating the gypsum from the posts. They are mainly used to insulate the ceiling and to prevent the propagation of vibrations. They are easily installed and can be supplemented by the addition of insulation wool before covering with gypsum sheets.

To maintain the soundproofing potential of the materials used, it is important that the installation is carried out properly. Improving this type of work can be expensive if you can not clog all the air leaks and if you find that the insulation you have installed is not enough. At Isolation and Multi-Concept Coverage, we respect all the standards established by the National Building Code (CNB) and guarantee our work. Call on experts! Contact us, we can help you.


image007 – Gypsum 5/8 “.
– Safe’n Soud 3 “½ sound insulation wool.
– Resilient bars.
– Sonopan panels.
– Nails.
– Gypsum screws.
– Wood or steel framing.
– Sealing tape.
– Joint cement.
– Scellant acoustique.