Use polyethylene sheeting from ceiling to floor around the affected area with a slit entry and covering flap. Maintain the area under negative pressure with a HEPA-filtered fan unit. Block supply and return air vents within containment area.
Use two layers of fire-retardant polyethylene sheeting with one airlock chamber. Maintain area under negative pressure with a HEPA-filtered fan exhausted outside of building. Block supply and return air vents within containment area.
The risk for respiratory exposure goes up if the remediation job disturbs mold and the spores can become airborne. Actions that could potentially stir up mold include:
• Using Invasive Procedures In Wall Cavity
• Breakup Of Moldy Porous Materials
• Actively Stripping Or Peeling Wallpaper
• Using Fans To Dry
In any of these cases, we recommend PPE to avoid inhaling mold spore and contact with the skin or eyes. Once all visible mold and mold-damaged materials have been removed and cleanup activities are completed, air quality should be sampled with a result similar to what is found outside the building.
If cleanup seems too daunting, make sure you hire a professional contractor who will follow all of these precautions. A plan should be implemented including collection of air, surface, and bulk (carpet, insulation, wallboard) samples to generate a remediation plan for the professional contractor to comply with.
If you suspect your HVAC system may be contaminated with mold, consult the EPA's guide involving air duct cleaning. This is an important resource to consult before taking any further action.