Duct Leakage 101: Why do ducts leak?
Source: ASHRAE Journal
Construction & Installation
Duct work is folded sheet metal that relies on manual installation and sealing. Unfortunately, quality of workmanship is widely inconsistent and lacks proper testing.
Manual Sealing Materials
Common materials such as mastic and tape deteriorate over time, further reducing the airtightness of your ductwork.
Renovations & Additions
Drill holes, disconnected and crushed ductwork are all common deficiencies found above the drop ceiling, caused over time by ancillary projects or contractors.