What are the standards of the National Building Code (NBC)?
The National Building Code (NBC) sets out technical provisions prepared by the Canadian National Research Council (CNRC) to describe the construction minimum standards in Canada. The NBC describes the types of materials, their specifications and minimum performances they must deliver when used in construction.
In the case of acoustics for a multi family building of more than one floor, or in co-ownership, the NBC REGULATION for airborne noise as of 2015 was STC 50 for separating partitions. Since 2018, the ASTC 47 standards, which take flanking into consideration, are also accepted as a REGULATION measurement.
Impact noise (IIC) is not yet regulated. There is a RECOMMENDATION of an IIC 55.
This recommendation leaves a significant gap for performance and interpretation in the field.
Despite there being no requirements in the National Building Code about mitigation of impact noises, a certain level is necessary for the occupants’ comfort and satisfaction. Although it is impossible to build a condominium unit thoroughly soundproofed, it is possible to design and build a certain acoustical comfort that allows the occupants to live comfortably without the concern of disturbing neighbors or being bothered by them.
Click here for the National Building Code and go to Division B Section 5.8 Sound Transmission.