Cricklewood Glass - Quality Products & Services Since 1986

Glass - Glazing - Secondary Glazing - Soundproof Windows - Splashbacks & Worktops - Shower Screens, Enclosures & Doors - Double Glazing & Units - Mirrors - Table Tops - In fact, Everything Glass!

Sound Proofing Windows - Soundproof Glass, Secondary Glazing Sound Proofing & Noise

SPECIALISTS IN SECONDARY GLAZING SOUND PROOFING - WINDOWS NOISE REDUCTION & NOISE INSULATION - SINCE 1986 - LONDON & HOME COUNTIES

Sound Proofing Windows Test, Noise Insulation

Day Design, Consulting Acoustical Engineers, Sydney, Australia, Sound Proofing Windows Test, Noise Insulation, Secondary Glazing London

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.

Despite that:

  • 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

Building Research Establishment, Technical Consultancy, Environmental Physics Division, Watford, Noise Reduction Acoustic Tests, Secondary Glazing London

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.

Computer Modelling - Secondary Glazing Sound Proofing Windows

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

Further information:

pdf Download our Secondary Glazing Brochure

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