Noise/Sound insulation



Unwanted noise is a problem in many domestic and commercial buildings, particularly those in urban environments, or period properties with original single glazing. Traffic noise, street noise, noise from aircraft; all can adversely affect living and working environments, causing unwanted stress, a lack of concentration and worse.



noise proof secondary glazing



Benefits of secondary glazing for noise insulation



Creates a quieter environment

Reduces sleep disturbance

Meets noise planning constraints

Aids increased concentration and productivity

Protects hearing

Keeps annoyance and stress levels low







Secondary Glazing Products


Find out more information about the different types of secondary glazing we can provide





Secondary glazing noise and sound insulation properties



Secondary glazing noise and sound insulation properties



Secondary glazing noise and sound insulation properties

Guidance and regulations


OSound is measured as a pressure and expressed in dB (decibels), where to the human ear a change of 3dB is just about noticeable. An increase in pressure levels to 10dB approximates to a doubling of loudness.


UK Guidelines include:


  • BS 8233:1999 'sound insulation and noise reduction for buildings'
  • Planning and policy Guidance 24: planning and noise
  • Building Bulletin 93: Acoustic design in schools
  • the WHO (World Health Organisation) 'Guidelines for Community noise' revised 1999 provides recommendations for inclusion in national guidelines


Reasonable noise levels at a glance:


Room Noise level
Bedrooms 30 - 35 dB
Music rooms 30 - 35 dB
Living rooms 30 - 40 dB
Classrooms/meeting rooms 35 - 40 dB
Librarys 35 - 40 dB
Open office 45 - 50 dB





Acoustic performance


acoustic performance of secondary glazing


Effect of cavity


cavity spacing noise secondary glazing




The Glass


Different types and thicknesses of glass in the secondary windows are specified to achieve the best noise insulation, dependent upon both the volume & the type of the outside noise.



  • 4mm Float Glass
  • 6mm Float Glass
  • 8mm Float Glass
  • 10mm Float Glass
  • 6.4mm Laminated Glass
  • 6.8mm Laminated Glass
  • 7.5mm Laminated Glass



  • 8.8mm Laminated Glass
  • 10.8mm Laminated Glass
  • 6.4mm Stadip Silence Laminated Acoustic Glass
  • 6.8mm Stadip Silence Laminated Acoustic Glass
  • 7.0mm Stadip Silence Laminated Acoustic Glass
  • 8.8mm Stadip Silence Laminated Acoustic Glass