Can I clean black mold under my carpet myself?« Back to Previous Page

The AC in my apartment seems to be leaking a bit of water onto the carpet in our third bedroom, which we don't use often. I just pulled back the corner of the carpet and found a few black, fuzzy patches on the concrete floor underneath that have probably been there for a couple of months. I’m worried it’s black mold. Is this something I can clean myself with bleach, or do I need to call a professional company to handle it?
Posted by Sabine Mueller
Asked on May 2, 2026 6:20 pm
Leaking AC units in Dubai create ideal conditions for mold growth under carpets due to our high humidity and constant condensation. The black patches you found are a type of mold, but "black mold" is a broad term; only lab analysis can confirm if it's the notorious Stachybotrys species, which is less common but requires a more cautious approach.

For a small, surface-level patch (under one square meter) on a non-porous surface like concrete, a careful DIY approach can be effective. However, the carpet and its underlay are porous and likely harbor hidden growth and spores. Do not use bleach; it is mostly water and can feed future mold growth while failing to address the root cause. Instead, use a dedicated EPA-approved mold cleaner or a solution of distilled white vinegar.

The critical first step is to stop the moisture source. Have your AC unit serviced to fix the leak immediately. Without this, the mold will return regardless of cleaning. For proper remediation, you must remove the affected section of carpet and underlay for disposal. Then scrub the concrete subfloor with your cleaning solution, allow it to dry completely, and use a HEPA vacuum to capture any remaining spores. Always wear an N95 mask, gloves, and eye protection during this process.

Given the duration (a couple of months) and that the growth is hidden, the infestation is likely more extensive than it appears. Mold roots (hyphae) can penetrate porous materials. For peace of mind and to ensure the health of your indoor environment, a professional inspection is strongly recommended. They can conduct moisture mapping and air quality testing to determine the full scope and verify the mold has been properly removed after cleanup. This is the standard for verifiable results, especially in a climate where hidden moisture problems can persist.
Posted by Sani Admin
Answered on May 3, 2026 9:54 am