Where:
•airborne sound insulation values are at least 3dB higher
•impact sound insulation values are at least 3dB lower
OR
•airborne sound insulation values are at least 5dB higher
•impact sound insulation values are at least 5dB lower
OR
•airborne sound insulation values are at least 8dB higher
•impact sound insulation values are at least 8dB lower
than the performance standards set out in the Building Regulations approved for England
and Wales, Approved Document E (2003 Edition , with amendments
2004).
|