The most effective way of reducing noise is to install good sound insulation. The noise of aircrafts flying overhead or traffic outside your door can be drastically reduced and blocked if you install insulation that has both a good thermal value and acoustic insulation properties. This can accomplish two important tasks simultaneously. Insulation made of blown-in cellulose and fibreglass is one of the best materials for sound absorption. These two types of material have great soundproofing abilities while also providing a great thermal resistance. It is also important to insulate the air pockets between the wall framing and in between the studs and joists. Acoustic batts made of rockwool are another great choice for sound insulation. They are specifically designed to control sound. They are excellent sound absorbing materials. No voids or gaps should be left when insulating, either for sound or for thermal performance.
Commercial sound insulation
In residential apartment buildings, acoustic insulation greatly improves privacy and keeps out unwanted sounds such as music from neighbouring apartments or footsteps from above. Acoustic insulation is also important when separating walls or floors in an office complex or school. The effects of annoying noises on one's health are numerous, including interrupted sleeping patterns and hearing loss, along with an increase in stress levels, which contribute to a lower quality of life and lower productivity.
Sound insulation provides protection from outside noises, comfort and privacy, reduction of sound vibration and transmission.
InsulationThickness inch NRC STC
Open Cell Polyurethane 3” 0.70 38
Closed Cell Polyurethane 2.75” 0.70 36
Rockwool Safe’n’Sound Batten 3” 1.05 45
Rockboard 60 3” 1.10 52
Fiberglass 703 3”1 10 52
Noise Reduction Coefficient (NRC)
Sound Transmission Class (STC)