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Wednesday, July 10 • 11:10 - 11:30
MEASUREMENT OF THE SOUND TRANSMISSION LOSS OF RAIN SCREEN WALL ASSEMBLIES

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As part of an initiative to adapt building facades for the future weather expected in British Columbia due to climate change, the sound insulation of rainscreen wall assemblies with superior moisture and thermal performance targets was investigated. A hybrid field test method was used to screen for the critical material and design variables which affect the sound transmission loss of rainscreen wall assemblies. The hybrid field test method used an outdoor source as per ASTM E966, the indoor sound levels were measured in a semi-anechoic environment as per ISO 15186. The prerequisite to evaluating the hybrid field test method was a specific investigation on the inclusion of the rainscreen drainage and ventilation cladding gaps in the test specimens, a deviation from the standard practice of testing a sealed wall assembly. A total of fifty-seven wall assemblies were screened at the hybrid field lab and a further eleven test were completed using the ASTM E-90 test method. While the results of the hybrid field test method did not align with ASTM E90 test results, the hybrid field test method was shown to be viable as a quick and lower cost means of obtaining results for the initial screening of designs. The results of the testing demonstrated that the use of split-insulation in the rainscreen cavity with increased cladding mass increased transmission loss.

Moderators
JM

Jeffrey Mahn

Research Officer, National Research Council Canada

Authors

Wednesday July 10, 2019 11:10 - 11:30 EDT
St-Laurent 4
  T11 Room & build. acoustics, SS03 Measur & predict of snd insul