Mold Remediation
Domain 1 - Mold remediation. This domain tests how a remediator turns an assessment into a controlled, documented job: stop the water, contain contamination, remove or clean affected materials, dry the structure, and verify results without spreading mold or creating new hazards.
Start with the source
- Fix the water intrusion before demolition or cleaning. Remediation without source correction is temporary.
- Establish the extent with moisture readings, visual inspection, and the assessment report. Mold may be hidden behind baseboards, wallpaper, or cabinets.
- Protect occupants: isolate the work area and keep vulnerable people out.
Contain and protect
- Use critical barriers and, for larger jobs, negative pressure with HEPA-filtered air scrubbers. Exhaust filtered air away from occupied spaces.
- Seal HVAC openings and shut down or isolate the system to prevent cross-contamination.
- Wear a NIOSH-approved N95 respirator at minimum, plus eye protection, gloves, and disposable coveralls. Upgrade protection when the risk assessment indicates.
Remove, clean, dry
- Discard porous materials with growth, such as drywall, insulation, and carpet, unless the project plan and standard justify cleaning.
- HEPA-vacuum surfaces, damp-wipe with detergent, and clean semi-porous wood or framing. Do not rely on bleach, ozone, or fogging to replace removal and cleaning.
- Dry to documented moisture goals using dehumidification and air movement. Encapsulants are not a substitute for cleaning.
Worked example
A 3 m by 4 m room has about 2 m² of drywall mold from a roof leak. The plan is to stop the leak, build negative-pressure containment, remove the wet drywall, HEPA-vacuum and clean the studs, dry the cavity, then verify visually and with moisture readings before reconstruction. Painting over the wall would trap moisture and fail.
Traps
Skipping source repair, using negative pressure without makeup air, fogging instead of cleaning, and letting the remediator set clearance criteria after seeing results all cost marks.