The North American steel industry has developed necessary tools to meet code requirements for acoustic separation in cold-formed steel frame construction in response to changes in the National Building Code of Canada (NBC). The code now considers additional paths for sound waves, including flanking transmissions through shared ceilings and floors.
The terms “air barrier” and “vapour retarder” (or “vapour barrier”) are perhaps some of the most poorly understood concepts in the construction industry. A general lack of understanding of the functions of these materials has resulted in simplistic rules-of- thumb. It is crucial the industry agrees on terminology that communicates the specific functions and purpose of these materials to avoid confusion and costly errors.
Reducing the operational energy use and increasing durability should be the prime concerns of architects who wish to design and build ‘green’ buildings,” wrote John Straube, PhD, P.Eng., principal at RDH Building Science and RDH Building Science Labs.