Efficient & sustainable<br />bio-based insulation

Efficient & sustainable
bio-based insulation

Home Efficient insulation Acoustic comfort

Key aspects of good acoustic insulation

Key aspects of good acoustic insulation



Sound goes wherever air can go: under doors, through window joints, air vents, roller blind boxes and through the wall itself if not properly sealed.
Good acoustic insulation implies good air-tightness.

Seal carefully to ensure a perfect seal! Place the vapour barrier making sure to correctly cover and joint the strips.
Use resilient strips around the edges or else seal with putty.


Acoustic attenuation

In order to protect against noise from outside the dwelling, it is essential to provide good insulation against airborne sound.

Favour the use of double walls including absorbent material and inner walls with high surface density (brick,gypsum, Fermacell).


Acoustical bridges

The uprights of a wooden framework, runners, cable troughs or water ducts are some of the acoustical bridges that can facilitate the propagation of sound

Remember to detach the wall from its finish facing.
It is also advisable to avoid positioning the connection points opposite one other (min. 20 cm).


Acoustic correction / sound traps

Mainly used in offices, restaurants and cinemas, it reduces the sound level by trapping the noise and preventing phenomena of sound reverberation.

Use absorbent surfaces such as curtains, carpets or an acoustic plenum made up of an absorbent insulation product placed behind a facing drilled on the inner side (in the wall or ceiling).

Key aspects of good acoustic insulation

Key aspects of good acoustic insulation

Key aspects of good acoustic insulation

Key aspects of good acoustic insulation


Characterised by :

  • Its level = given as dB, this corresponds to acoustic pressure
  • Its frequency: given as Hz, this corresponds to the number of vibrations per second. It allows us to tell between low-pitched and high-pitched sounds

Rw (C ; Ctr)

Expressed in dB, this describes the insulation of a wall :

  • Against outdoor airborne sound : Rw Ctr (road noise)
  • Against indoor airborne sound : Rw C (pink noise)

Decibel (dB)

Unit of measurement that expresses the level of noise. It is expressed on a non-linear scale which has the peculiarity that the sound level is multiplied by two every 3 dB (e.g.: 60 dB 60 dB = 63 dB).

120 dB Airplane
110 dB Concert
100 dB Car horn
90 dB Restaurant
80 dB Automobile
70 dB Road traffic
60 dB Conversation
50 dB Country side
40 dB Silence

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