Case Study: Duct Leakage Test Failure Due to Improper Sealing

This case underscores a key takeaway for contractors working on new or existing buildings in Clark County: duct sealing is not a checkbox item. Proper application of mastic—particularly at connections, seams, and elbows—is essential to passing your duct leakage test on the first try. It’s also crucial for long-term HVAC efficiency and occupant comfort.