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Rw dB values for Selectaglaze Secondary Glazing Systems

 Key:  HS - Horizontal sliding, VS - Vertical sliding, TVS - Tilt in vertical sliding, SHC - Side hung casement, DSH - Double side hung, LO - Lift out, FL - Fixed light, DFL - Demountable fixed light.

Selectaglaze systems used in Control Rooms or as part of a triple glazed assembly have achieved reductions up to 56 dB.                 

Test Standards

Selectaglaze secondary window systems have been tested at the Taylor Woodrow Technology Centre in accordance with BS EN ISO 140-3:1995 'Laboratory measurement of airborne sound insulation of building elements'.  Certificate of Test Number 8049 - March 2006.

The results have been interpreted by Hann Tucker Associates, consultants in acoustics, to extrapolate and interpolate sound reduction values for the full range of Selectaglaze products.  The table shows results for secondary windows set at a 200mm cavity with 6mm float glass in the primary window.  Figures are available for cavities set at 50mm, 100mm or 150mm and also 1/3 octave Sound Reduction Index (R) values for each test. 

• Reasonable Noise Levels
• How secondary glazing reduces internal noise levels