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Acoustic glass

When and where to use acoustic glass

When noise can’t be stopped at source the only remedy is to reduce the level of noise entering the home. This can be done by using Acoustic Laminated Glass (Sound Control Glass). By using acoustic laminated glass there are also other benefits such as improved safety, security and a reduction in UV light (which can fade furniture and carpets). Sometimes a homeowner only needs to use acoustic glass on a limited number of windows such as those facing a road, bus stop or playground area.

We stock three thicknesses of acoustic laminated glass, 6.8mm, 8.8mm and 10.8mm. When incorporated into a typical Insulated Glass Unit with 4mm glass, the reduction in sound is 37, 39 and 41 dB respectively. This means that the glazing reduces the sound level by those figures compared to 30dB from a standard IGU.

External traffic noise
Target indoor noise level in dB (A)
Required window performance
20m from a motorway. Average speed 62mph. Typical noise level = 78dB (A) Ra tr.
Bedroom 30-35dB Living room 30-40dB
43-48dB (A) Ra tr. 38-48dB (A) Ra tr.
20m from a busy main road. Average speed 31mph. Typical noise level = 68dB (A) Ra tr.
Bedroom 30-35dB Living room 30-40dB
33-38dB (A) Ra tr. 38-38dB (A) Ra tr.
Residential road screened by houses. Typical noise level = 58dB (A) Ra tr.
Bedroom 30-35dB Living room 30-40dB
33-28dB (A) Ra tr. 18-28dB (A) Ra tr.
Single Glazing
Sound Reduction Rw (C,Ctr)dB
Sound Inside
Outside 70dB
6.8 Absorbs 35dB (1,-3)
Inside reduced to 35dB
Outside 70dB
8.8 Absorbs 37dB (1,-4)
Inside reduced to 33dB
Outside 70dB
10.8 Absorbs 38dB (-1,-2)
Inside reduced to 32dB
Double glazed unit
Sound Reduction Rw (C,Ctr) dB
Sound Inside
Outside 70dB
4mm & 4mm IGU absorbs 30dB (0,-3)
Inside reduced to 40dB
Outside 70dB
6.8mm & 4mm IGU absorbs 37dB (0,-4)
Inside reduced to 33dB
Outside 70dB
8.8mm & 4mm IGU absorbs 39dB (-1,-5)
Inside reduced to 31dB
Outside 70dB
10.8mm & 4mm IGU absorbs 41dB (-1,-4)
Inside reduced to 29dB

Does Acoustic glass eliminate all noise? No, but the effects of noise will be greatly reduced. Noise is measured in Decibels (dB) and the noise will be reduced by the Db rating of the Glass/IGU. The higher the rating the less noise will pass through the glass.

Does the type of window frame affect the performance of the glass? Yes, It is the glass and frame that help to reduce the noise. Poor quality frames and badly fitting sashes can still allow sound to penetrate through.

What types of noises will acoustic glass reduce? Acoustic glass will help to reduce noise levels from all types of sources such as traffic, road works, schools, noisy neighbours, people at bus stops and pubs & nightclubs etc.

Does Acoustic glass offer any other benefits? Yes, the fact that acoustic glass is a laminated glass also gives the advantage of safety & security to your home. The interlayer also filters 99% of the UV light which can be the cause of faded curtains, carpets and furniture.

How effective is Acoustic glass? The performance of acoustic glass will vary according to the glass configuration used and the noise source. However, by changing your glazing from typical 4-16-4 to 4-16-6.8. You can reduce the noise by as much as 25%. Further gains can be obtained by incorporating the 8.8mm or 10.8mm versions.

How does Acoustic glass work? Acoustic glass absorbs and weakens sound, helping to act as a barrier to airborne and impact noise, making your home a quieter place.