Air Duct Mold Removal in Houston, TX

Air duct mold removal in Houston homes

Houston attics stay humid most of the year. Duct mold tracks that humidity. Growth needs moisture plus settled organic dust. Bare galvanized metal rarely feeds anything. The dust film lying on it does. That distinction decides how a run gets treated.

Material matters more than method. Flex duct has a plastic inner liner, so growth sits on the surface film. Ductboard plenums and older internal fiberglass liner are porous. A scrub brush shreds that fiber and spreads it. When growth has gone into the matrix, that section is replaced, not cleaned. Fogging biocide over furry ductboard is cosmetic work.

Find the water before touching the duct. Slipped boot collars pull humid attic air straight into the return path. Metal boots at ceiling registers sweat and rust. Sagging flex pools dust at the low point. A fouled evaporator coil cuts airflow and pushes indoor humidity up. Clean around those and it comes back by next summer.

Two local cases need extra looking. Some 1950s and 60s slab builds have under-slab ducts prone to silt and moisture infiltration. Flood-affected homes need boots, chases and lower runs opened and inspected.

Dark streaking at register edges is often filter bypass lint. That is not mold, and replacement would be wasted.