Wet Duct Interiors Feed Mold That Gets Delivered Building-Wide
Condensation forming inside air vents and duct sections in a Las Vegas home usually means warm, humid air is contacting cold duct surfaces and moisture is forming on the duct interior. This happens most commonly in homes where duct sections run through unconditioned attic spaces, where duct insulation is damaged or missing, or where return air ducts have developed leaks that pull warm humid air from unconditioned spaces into the cold duct system.
When condensation forms inside ducts, it creates sustained wet conditions on the duct interior surface. Fiberglass duct lining and flexible duct inner liners both support mold growth in sustained wet conditions. A Las Vegas home in Summerlin with flex duct runs through an attic showed significant mold on the inner liner of several duct sections. The duct insulation had delaminated in multiple locations, allowing hot attic air to contact the cold inner duct surface and produce condensation throughout the summer cooling season.
Signs of Duct Condensation
Visible moisture dripping from supply registers, water staining around vent covers on ceiling or wall surfaces, black discoloration accumulating around registers faster than normal dust, and a musty smell when the system runs are all indicators of duct condensation leading to mold growth. Any one of these warrants investigation.
What We Do
We inspect the accessible duct system, identify where condensation is forming, and assess whether mold has established in affected sections. We provide a scope that addresses both the condensation source and any mold remediation required. Read more about our mold inspection process. Call (702) 442-1126.