Mold Remediation Containment

When performing remediation on an area of mold, containment precautions are necessary. The design of containment procedures prevent the mold spores from moving to another area of the building when they are disturbed.

The EPA outlines two types of containment: limited and full. Limited containment generally refers to an area between ten and one hundred square feet of mold, while full containment refers to areas larger than one hundred square feet or areas that are more likely to spread the mold throughout the building during the remediation process.

By using double layers of polyethylene sheeting and fans exhausted to the outside of the building, you can create negative air pressure. Maintaining this negative pressure keeps the contaminated air from reaching uncontaminated parts of the building. Inward billowing of the polyethylene sheeting indicates that you are maintaining negative air pressure. If this state changes, address it immediately before resuming remediation efforts.

Use of decontamination chambers and airlocks prevent the spread of mold spores. These should be used in an area that separates the clean areas of the building from the contaminated areas.

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