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This one day class was developed in 2016 to help builders meet the City Of Vancouver requirements of 3.5 ACH50 by the air-tightness experts at RDH Building Science, and Small Planet Supply. Since then, over 300 builders, architects and inspectors have been trained to plan and build projects with complete air barriers. The training covers … Continued

This one day class was developed in 2016 to help builders meet the City Of Vancouver requirements of 3.5 ACH50 by the air-tightness experts at RDH Building Science, and Small … Continued