9.11.2.1.(2)

Intent 1:

To limit the probability that occupants in one part of a house will be exposed to excessive levels of airborne noise from other parts of the house, which could lead to negative effects on the psychological well-being of persons.

Intent 2:

To exempt houses with secondary suites from the more stringent requirements for sound transmission class ratings in Sentence 9.11.2.1.(1), on the basis that it may be cost-prohibitive where the secondary suite would be constructed as a retrofit and that the occupants of the house containing a secondary suite would be affected only by the sound of one other unit.

Intent 3:

To direct Code users to:

• Subsection 9.11.1., which refers to standardized methods of establishing the sound transmission class ratings of wall, floor and ceiling assemblies, and
• a series of tables in Appendix Appendix A-9.10.3.1., which list the sound transmission class ratings assigned to a selection of wall, floor and ceiling assemblies.