HVAC & Air Duct Mold Removal in Decatur, GA

Local conditions in Decatur

Decatur, the DeKalb County seat about 6 miles east of downtown Atlanta, has a large stock of historic housing: early 20th-century Craftsman homes in the MAK Historic District and bungalows in Oakhurst and Ponce de Leon Court. Many of these houses gained central air decades after they were built. Installers ran ducts through vented crawl spaces and low attics, sometimes with patchwork additions as rooms were added. Those spaces are humid in summer, so cold ducts with gaps in their insulation sweat, and wet wrap can grow mold on the duct and the joists above it.

Bungalows often have the air handler in the crawl space itself. That puts the coil, pan and drain line in the dampest part of the house, and a pan that overflows there may go unnoticed for months. Leaky return ducts in the same space can pull damp crawl space air straight into the system, so the smell shows up in every room the air reaches. A unit sized for a bigger house can make things worse by cooling quickly and shutting off before it removes much moisture.

Visual inspection or lab testing?

Signs to look for

• A basement-like odor through the floor registers
• Dark growth on the outside of ducts under the house
• Rust on the base of a crawl space air handler
• Dust collecting in fuzzy patches on floor grilles
• Humidity indoors staying above 60 percent

Timing

Crawl space work is more bearable in spring and fall, and replacing ducts then avoids losing cooling during summer heat. If growth turns up mid-season, EPA advises not running a contaminated system, so ask about short-term options. Any rebuilding that follows, such as replacing subfloor or ceilings, may need a permit; Decatur takes building permit applications only through its online CommunityCore portal, and the permit technician can be reached at (404) 377-6198.