Mold from AC leak: remediation cost and DIY possible?« Back to Previous Page

The black splotch from an AC leak is a serious concern, as it indicates active growth from a constant moisture source. This is not a simple surface issue; the moisture has likely penetrated the drywall, and the mold you see is just the visible portion.

For a situation like this in JVC, where high humidity accelerates growth, DIY is strongly discouraged. Attempting to clean it yourself can aerosolize spores, spreading the contamination to other areas and posing a significant inhalation risk. The critical first step is stopping the leak at its source by having an HVAC technician repair the AC unit. Without this, the mold will return regardless of any cleaning.

Professional remediation is the recommended course of action. The cost is not fixed; it depends entirely on the extent of the hidden damage behind the wall. A proper assessment involves moisture meters and possibly an endoscopic camera to see inside the cavity. Remediation would include containment of the area, safe removal of affected drywall, HEPA vacuuming, antimicrobial treatment, and finally, repairs. Always request a detailed scope of work and ensure the company provides before-and-after testing from an accredited lab to verify the space has been returned to a healthy condition.