Stachybotrys and other dark mold species grow inside wall cavities, behind baseboards, and under subfloors where surface products cannot reach. Disturbing a colony without containment sends spores through HVAC ducts and into unaffected rooms. Slidell’s subtropical humidity means those spores find new damp surfaces quickly, especially in homes near Lake Pontchartrain where ground moisture stays elevated after rain events.
A technician assesses whether affected materials are porous or non-porous. Hard surfaces like tile and metal can be HEPA-vacuumed and damp-wiped. Porous materials, drywall, insulation, carpet padding, and wood framing with deep penetration, require physical removal and disposal. Containment barriers and negative-air pressure are in place before any cutting or demolition begins, keeping spore counts controlled in adjacent spaces.
After removal, the moisture source is corrected and the area is dried to confirmed readings before antimicrobial treatment is applied. Clearance testing documents that airborne spore levels have returned to normal. Skipping that final step is common with general contractors; without it, there is no way to confirm the removal was complete rather than cosmetic.