ac leak causing mold: diy bleach or call professional?« Back to Previous Page

Given the black speckled patches and your scratchy throat, you are likely dealing with active mould growth. The damp, earthy smell is a strong indicator that mould is colonising the damp materials, not just sitting on the surface.

Bleach is ineffective and potentially hazardous for this situation. It only bleaches the visible colour on non-porous surfaces but does not kill the root structure (hyphae) within porous materials like drywall and carpet. In Dubai's high humidity, the underlying moisture will cause it to return quickly. More critically, mixing bleach with other cleaners or applying it in a poorly ventilated space can create dangerous chlorine gas.

Your case requires a professional assessment. The leak has likely saturated the wall's internal structure and the carpet underlay, creating a large, hidden reservoir of moisture perfect for mould. A certified inspector can use moisture meters and thermal imaging to locate the full extent of the water damage and take air/surface samples for a lab culture to identify the mould species. This is crucial for determining the correct remediation protocol.

For a leak of several weeks, DIY is not advised. Proper remediation involves isolating the area, removing the contaminated porous materials (drywall, insulation, carpet), HEPA vacuuming, and using specialised antimicrobial agents. Simply cleaning the surface will not address the health risk or prevent recurrence. After fixing the AC leak, controlling indoor humidity is essential to prevent future issues.