Mold returned after bleach; DIY or professional for AC leak?« Back to Previous Page

Based on your description, this is a clear case requiring professional mold inspection and remediation. The scenario you've described—an AC unit leaking into a wall cavity with subsequent mold growth on the skirting board—is extremely common in Dubai due to our high humidity levels and year-round reliance on AC systems. The condensation from AC drain line blockages or faulty insulation provides the constant moisture mold needs to thrive.

Your attempt to clean it with bleach is a common mistake. Bleach is ineffective on porous surfaces like wood and drywall. It only bleaches the visible surface mold while leaving the root structure (hyphae) intact within the material. Furthermore, the water content in bleach can actually provide additional moisture, facilitating the rapid and worse regrowth you witnessed. The damp smell confirms that active microbial growth is occurring, likely deep within the wall.

A DIY approach is not advisable. Disturbing the mold without proper containment can aerosolize spores, spreading the contamination to other areas of your villa. In the UAE, improper handling can violate health and safety standards for indoor air quality.

A professional inspection from a company like Saniservice is critical. Our certified inspectors use borescopes to assess the damage inside the wall cavity, moisture meters to pinpoint the exact source of the leak, and air quality tests to identify spore types and concentrations. We then execute a controlled remediation process under containment, using EPA-approved antimicrobials effective on porous surfaces, followed by addressing the root cause: the AC leak.

For a thorough assessment and permanent solution, I strongly recommend you call our experts at 800-MOLDS (800-66537) or email hello@saniservice.com to schedule an inspection.