In order to characterize the acoustical performance of green roofs and living walls, in the fall of 2008 a sound transmission facility was constructed at the BCIT Burnaby campus. The sound transmission of roofs and walls are quantified by Transmission Loss (TL) – the sound reduction, measured in decibels, across a partition from the source side to the receiver side. Evaluations were performed with an intensity measurement method in accordance to internationally accepted standards (ASTM and ISO). At the facility, 29m2 (312 ft2) exchangeable roof specimen panels (wood, steel or concrete decks with green roof variables) constitute the roof plane of the reverberant room. The lab conditions, as well as the temperature and soil moisture of the test specimens, were controlled and monitored.