Air Duct Mold Removal in Westlake Village, CA

Air duct mold removal in Westlake Village

Morning marine layer pushes up the Conejo grade and sits in the lower canyons. Homes near Westlake Lake hold that damp into mid-morning. By afternoon the attic above them is brutally hot. Supply boots sweat where the wrap is thin or torn. That wet-then-hot cycle is what grows mold in ducts here.

Growth is almost never system-wide. It starts at the evaporator coil, the plenum, and the first few feet downstream. Then individual boots, usually bathrooms and north-side rooms. Mold needs liquid water. Dust by itself is just dust. The leak gets found first, maybe a sweating boot. Or an overflowing condensate pan, before anything is cleaned.

Material decides the method. Old galvanized trunk in 1950s-60s stock can be scrubbed, dried, and left bare. Flex duct is different. Its inner liner is thin film over wire, and the jacket is fiberglass. Once mold is in that liner or the wet insulation, cleaning is theater. That run gets replaced instead. Fiberglass duct board plenums are porous the same way. Fogging biocide into a damp system just reseeds it.

Check it yourself first. Drop two register grilles and look up inside the boot. Black speckling, damp fiberglass. A sour smell at startup. If it reads as ordinary dust, we will tell you that.