Finnforest UK


SOUND TRANSMISSION

SOUND DEFINITIONS
AIRBORNE
Airborne sounds are audible noises such as: talking, music, television etc.  Airborne sound insulation of party floors and walls is measured as the difference between the noise source in one dwelling and the noise received in the adjacent dwelling.  The higher the airborne sound value, the better the airborne sound insulation.

IMPACT
Impact sounds are sound transmissions produced when a construction element vibrates due to direct impact such as walking or jumping.  Impact sound is measured as the level of noise received from one dwelling to the next.  The lower the impact sound value between dwellings the better the impact sound insulation.

SOUND REQUIREMENTS FOR FLOORS

*  Achieved in laboratory test.
** On site testing may be required.

Source:  Building Regulations Approved Document E (2003)
             Scottish Technical Standards Sect H (1999).
For information on compartment floors please contact Finnforest Technical Support on 01205 883 835.

SOUND TESTS RESULTS 2003
SINGLE OCCUPANCY DWELLING


Notes:
1.   Test results achieved November 2003 and July 2004.
2.   Minimum of 40dB must be achieved according to
      English Building Regulations.
3.   Tests on a floor construction with joists at both 400mm
      and 600mm centres achieved the same sound
      insulation.
4.   40+ indicates not tested but extrapolated.
5.   Quilt: min 100mm quilt 10kg/mē.
6.   All tests based on minimum flange width (38mm).
7.   15mm plasterboard (wallboard) 9.9kg/mē.
8.   To improve airborne sound performance we recommend
      sealing the edges of floor deck to wall with non setting
      mastic.
9.   For further information please contact Finnforest
      Technical Support 01205 883 835.