Mold Remediation Certification Practice Exam

If flex ducting is contaminated with mold growth, what is the proper method for decontamination?

1. Soaking in disinfectant

2. Remove and replace

3. Clean with a brush

4. Seal with a protective coating

The correct answer is: Remove and replace

When it comes to decontaminating flex ducting that has been contaminated with mold growth, the most effective and appropriate method is to remove and replace the ducting. This approach is recommended because flex ducting is generally constructed from materials that are porous and can easily trap mold spores, moisture, and debris within their fibers. Once mold has established itself in these materials, it is very challenging to ascertain whether all mold spores have been effectively removed through cleaning. Even thorough cleaning techniques, such as brushing or applying disinfectants, may not fully eliminate the contamination or might not adequately address hidden mold within the ducting. In situations where the interior of the ductwork is compromised or significantly contaminated, simply cleaning or sealing will not be sufficient to ensure the safety and health of the indoor environment. Therefore, removing the affected sections of ducting and replacing them with new, uncontaminated material guarantees the elimination of the mold hazard and significantly reduces the risk of future mold issues in the HVAC system.