Black Mold vs. Mildew Guide

Dark or light growth can have different causes, and color alone does not identify a species or determine a project scope. Focus on visible conditions, moisture, affected materials, and any history of water intrusion.

What to document

• Where the visible condition appears and which materials are affected.
• Musty odors, visible staining, condensation, leaks, or other moisture conditions.
• Whether the material is porous and whether the area is concealed or difficult to access.

Testing and remediation are separate decisions

Testing is not automatically required before remediation. When specifically requested or required by an owner, carrier, consultant, project specification, or other authorized party, testing may be coordinated separately. The testing professional’s findings remain separate from remediation work.

Source-removal remediation may include containment, engineering controls, HEPA-filtered air filtration, HEPA vacuuming, physical cleaning, removal of affected materials when required, moisture control, and cross-contamination prevention. Health questions should be directed to a qualified medical professional.