Sound Proofing Windows Test, Noise Insulation
The following testing was carried out in November 2012 in Sydney, Australia, where our systems are imported - especially for noise insulation.
It is not typical of UK conditions because the primary window was only 3mm glazed, whereas UK glazing would be a minimum of 4mm - and the secondary glazing sound proofing was fitted with laminated - but not acoustic soundproof glass.
- the test achieved an impressive Weighted Noise Reduction Index of Rw 45 dB
If you would like to see the full test data report, please click on the Day Design Certificate or here
Original Secondary Glazing Sound Proofing Test without Sound Proof Glass
This was the first testing that we carried out, in October 1994, at the Building Research Establishment, in Watford.
Things were rather more primitive in those days! We tested a range of non-soundproof glass and achieved the following noise reduction results:
- for 4.0 mm float glass Secondary Glazing - Weighted Noise Reduction Index of Rw 39 dB
- for 6.0 mm float glass Secondary Glazing - Weighted Noise Reduction Index of Rw 40 dB
- for 6.4 mm Laminate Secondary Glazing - Weighted Noise Reduction Index of Rw 41 dB
If you would like to see the full test data report, please click on the Building Research Establishment Certificate or here
Alternatively, please read the Test Summary & General Advice on Secondary Glazing and Sound Reduction which has been written as a “Layman’s’ Guide to the very technical test report.
Nowadays, using the latest technology and working with acoustic specialists, we have been able to carry out computer modelling to obtain the noise insulation values for different types of glass and varying window reveal (cavity) depths.
Additionally, over the years we have improved and optimised our product designs and seals to maximise their noise insulation properties.
Taking 150mm as the distance between the 4mm float primary window glass and the secondary glazing glass, which is the average achieved in most situations, the results for our current product range are as follows:
|using 4.0 mm Float Glass||- Weighted Noise Reduction Index of Rw 48 dB|
|using 6.0 mm Float Glass||- Weighted Noise Reduction Index of Rw 49 dB|
|using 6.4 mm Acoustic Laminate Glass||- Weighted Noise Reduction Index of Rw 50 dB|
Summary Advice - Sound Proofing Windows
This download provides a good, brief summary, of advice regarding Secondary Glazing Sound Proofing Windows and Noise Insulation
An Excellent, Independent Guide to the use of Sound Proof Glass
Guidance & Info from Saint-Gobain UK LTD - manufacturer of Stadip Silence Glass Stadip Silence Acoustic Glass
Visual Guide to Noise Levels, Noise Reduction & Recommendations
Noise Chart - About Noise - Actual, Typical & Recommended
- For Maximum Noise Reduction, How to Specify
- A Guide to Measuring Noise and How it is Perceived by our Ears!
- WHO & British Standards Recommended Healthy Internal Noise Levels
Download our Secondary Glazing Brochure