Mold on wall: DIY clean or call a professional?« Back to Previous Page

That black spot pattern behind the sofa, especially on an interior wall with a constant damp feeling, is a classic sign of a condensation issue common in Dubai. The wall is likely cold from the AC, and humid air is condensing on it, creating the perfect environment for mould.

For a small, surface-level patch (less than one square meter), a thorough DIY clean can be effective. Use a microfiber cloth and a solution of detergent and water, not just bleach. Bleach only removes the surface colour and does not kill the roots penetrating porous materials like drywall. After cleaning, the area must be dried completely with a fan to prevent immediate regrowth.

However, given the description—multiple spots, a persistent damp feeling, and location on an interior wall—this suggests a deeper moisture problem. The dampness could be from a hidden plumbing leak within the wall or significant condensation due to poor insulation. Scrubbing it will only be a temporary fix; the mould will return within weeks if the root moisture issue isn't identified and resolved.

In this case, a professional inspection is strongly recommended. They will use moisture meters and thermal imaging to find the exact source of the water intrusion behind the wall. Proper remediation involves isolating the area, removing affected porous materials if necessary, and using industrial-grade HEPA filtration to capture airborne spores. The critical final step is diagnosing and fixing the moisture source, otherwise, the problem is guaranteed to recur. For verifiable results, the process should conclude with post-remediation testing to confirm the spore count has returned to normal indoor levels.