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Sound insulation of his new house in the South-West

Sound insulation of the house

Table of contents

The Southwest is an attractive region but some land is placed in noisy environments. Building a house there requires sound insulation. Objective: not to suffer noises from outside, nor those from inside.


According to an INSEE study, 54% of households living in towns with more than 50 inhabitants say they are bothered by noise. There New acoustic regulations (NRA) of 30 June 1999 imposes on independent single-family houses isolation from airborne noises exteriors, such as road traffic For example. On the other hand, nothing is imposed concerning the transmission of noise inside the house. To ensure your comfort, thesoundproofing inside the house is not to be neglected. Your individual house builder will be able to advise you.

Four noises from which you need to isolate yourself in a single-family home

Sound insulation against noise
Sound insulation protects against uncomfortable noise. source ADEME

                        Exterior airborne noise

For those who choose to live in town, it is the noise of a busy street, for example, such as voices or the road traffic. It can also be a railway line or passing planes. According to la législation, facade insulation to external noise (land and air transport) must reach at least 30 dB.

In the countryside or in a quiet residential area, residents will be bothered by the noise of neighbors (lawnmowers, conversation, barking…), or sometimes from nature itself.

                        Interior airborne noises

Noises from conversation, television or music can quickly disturb those who are trying to sleep. Preserving the privacy and freedom of the inhabitants is the privilege of well-designed houses. Acoustic comfort is therefore essential for everyone to go about their business without disturbing others.

                        The noises of shocks

They are generated by the movement of people or animals, the fall of objects. Carried through solid materials (walls, floors, etc.), they resonate throughout the house, which is very disturbing.

                        Equipment noises

These are the sounds emitted by the dishwasher, mechanical ventilation, taps. These noises, inaudible during the day due to the ambient agitation, disturb the inhabitants at night.

Sound insulation for a new house protected from outside noise

Where the air passes, the sounds also pass. To isolate oneself from the outside, one must then take care of theenvelope of the House. As thermal bridges are tracked, points of contact between the hot interior air and the cold exterior air, it is also necessary to eliminate untimely passages of air.

See article 5 questions to understand the insulation of my new house.

                        Sound insulation of exterior walls

Sound insulation of masonry walls.
Glass wool type insulation on the exterior walls provides thermal and sound insulation.

The rule is simple. The heavier and thicker the wall, the more it blocks the outside noises. To increase this protection, masonry facades are usually isolated. Solution recommended by the single-family home builder House Sic, sound and thermal insulation between your wall and a plasterboard counter-partition will ensure good soundproofing.

                        Insulate the roof

The sound can also come from the roof. We think of airborne noise, but also to impact noises rain on the roof. A lost attic in which is placed a flexible insulation of the glass wool type will better insulate the house from this type of noise.

This principle is implemented by Maison Sic when building individual houses for its customers. Details are available in an exhibit that recreates the stages of building a house in scale 1, and available here in virtual visit.

                        Sound insulation of windows

The Windows and their installation are essential elements for good acoustic insulation. In a classic window, the noise goes through the carpentry and glazing. Choose models adapted to the sound environment of the house. But beware ! A double glazing insulates from the cold but not necessarily from noise. For a very noisy environment, the most efficient windows will have an attenuation greater than 37 dB.

                        Watch out for roller shutters

Air inlets and roller shutter boxes let in noise. If you live in a noisy area, your individual home builder will choose suitable products.

Sound insulation of rooms in the house

The comfort of the inhabitants depends first on a design of the well thought out house. To guarantee quiet nights, the rooms are far from the amenities noisy like the washing machine or the ventilation for example. Low-noise equipment should also be preferred.

                        Sound insulation of interior partitions

In order to save space, interior partitions are usually made from plasterboard. A good design of these light walls however, guarantees good sound insulation. Mounted on a metal frame that encloses one or more layers of insulation, their acoustic efficiency is based on the principle mass-spring-mass. Basically, the masonry wall reflects some of the noise. What passes through is partly absorbed by theflexible insulation. The rest, reflected by the second wall, returns to the insulation where it fades.

                        Sound insulation of floors

The footsteps are very painful on a daily basis, they spread through the structure and are heard everywhere in the house. I'soundproofing du plancher de l 'floor is therefore important. There resilient layer under your floor covering is essential, as well as careful implementation. The principle is to separate the structure of the house from the finished floor.

Against airborne noise, we always apply the mass/spring/mass principle. An insulator is placed between the floor and the screed which accommodates the flooring.

                        Insulated interior doors

For toilets, bedrooms, etc. Prefer hinged doors with an insulating core, which let less noise through.


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