If you live near a main road, railway or flight path, acoustic glass can make a real difference. Here's how it compares, using Saint-Gobain's published figures.
The numbers
| Unit | Sound reduction (Rw) |
|---|---|
| Standard 6/16/6mm clear | 33 dB |
| 6/24/4mm clear (mixed thickness) | 35 dB |
| 6/20/8.8mm with acoustic laminate | 43 dB |
| Triple unit with two acoustic laminates | Up to 50 dB |
A 10 dB improvement is generally perceived as roughly halving the loudness, so the step from 33 to 43 dB is very noticeable.
Acoustic laminate vs security laminate
Both are laminated, so both hold together when broken. The difference is the interlayer: an acoustic interlayer is designed to damp sound vibration, while a standard security interlayer is designed to resist attack. Some acoustic laminates also carry security ratings, so you can often get both in one pane. We'll check the rating for your project.
Tips for the best result
- Use panes of different thicknesses so they don't resonate together.
- Choose a well-sealed frame. Cortizo COR 70 reaches up to 46 dB, for example.
- Remember trickle vents and gaps can let noise through. Acoustic vents are available.
Worth it?
For bedrooms and home offices facing noise, yes. For quiet rural homes, standard double glazing is usually enough.
