Air Duct Mold Removal in Los Gatos, CA

What duct mold removal actually involves in Los Gatos

Crawlspace supply runs under raised foundations downtown and in the foothills are where we find most of it. Wet winters, cool metal, damp ground, and growth follows. Creek-adjacent lots run damper still. Attic trunk lines usually stay dry. When they don't, a disconnected flex boot is pulling humid air from somewhere it shouldn't.

First question is always the material. Bare galvanized sheet metal can be cleaned and stays clean. Porous surfaces cannot. Degraded fiberglass wrap, the inner liner of old R-4.2 flex, and soft insulation at the plenum hold growth inside the fiber. Those sections get cut out and replaced. Spraying a biocide over wet fiberglass does nothing.

Second question is why it grew. Kill the colony, leave the moisture, it returns. We look at condensate drainage, crawlspace vapor conditions, crushed radius turns that trap air, and leaky filter racks on a single undersized return.

One caution on older homes. Pre-1975 plenums around here sometimes carry asbestos-containing tape. If we see it, nothing gets disturbed, cut, or brushed until it's tested by someone licensed for that.

Gray dust on a register is not mold. Have a look before you assume the worst.