Mold remediation

The Institute of Inspection, Cleaning and Restoration Certification (IICRC) announced the publication of a newly-revised ANSI-approved ANSI/IICRC S520 Standard for Professional Mold Remediation (4th edition, 2024). 

This Standard describes the procedures to be followed and the precautions to be taken when performing mold remediation in residential, commercial, and institutional buildings, and the systems and personal property contents of those structures. 

This Standard was written for use by those involved in the mold remediation industry, primarily for mold remediation companies and workers, and secondarily, for others who inspect or assess mold complaints, prepare remediation specifications, protocols, or procedures, and manage remediation projects (e.g., indoor environmental professionals or IEPs). 

Finally, this document is for other materially interested parties (e.g., consumers and occupants, property owners and managers, insurance company representatives, government, and regulatory bodies). 

The ANSI/IICRC S520 Standard for Professional Mold Remediation includes the following which are described in the Standard: 

Principles of Mold Remediation Mold Cleaners, Antimicrobial Chemicals, and Coatings

Remediation Tools 

Building and Material Science 

Remediator Qualifications 

Safety and Health 

Administrative Procedures, Documentation and Risk Management Inspection and Preliminary Determination 

Limitations, Complexities, Complications and Conflicts (LCCC)

Structural Remediation 

HVAC Remediation 

Contents Remediation 

Post-Remediation Verification 

Indoor Environmental Professional 

Jim Pearson, IICRC S520 Consensus Body chairman, said: “After participating in the creation of the S520 since its inception, then Chairing it through its 3rd and 4th Editions, I feel this Consensus Body has been the most dedicated, hard working and productive group of volunteers I have never worked with. We believe this is the most accurate and informative Standard of Care for mold remediation ever produced.” 

Brandon Burton, IICRC Standards chairman, said: “This update represents a critical step to ensure the industry accepted Standard of Care reflects what is current and prudent in the field of Mold Remediation. I commend Mr. Pearson and the current IICRC S520 Consensus Body on the countless hours and effort they have volunteered to this revision, and to their ongoing commitment to our industry and its stakeholders.” 

To purchase a copy of the new ANSI/IICRC S520: 2024 and other standards, visit