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Black mould on walls and ceiling is a common problem in Singapore, where high humidity and frequent rainfall create the perfect environment for fungal growth. While many homeowners try to clean it off, mould is often a symptom of a deeper waterproofing issue.
As a professional waterproofing company in Singapore, we’ve treated hundreds of cases where recurring mould was caused by hidden leaks, failed sealants, or wall seepage. Here’s what you need to know — and what to do next.
Black mould forms when moisture accumulates on wall surfaces for extended periods. In Singapore homes — including old HDB flats, Condos and Landed Homes.
Singapore’s average humidity often exceeds 70%, making condensation a daily occurrence, especially in air-conditioned rooms.
Cracked external walls, deteriorated sealants, and failed bathroom membranes allow water to seep into walls.
Water penetration from roof slabs or upper-floor bathrooms can lead to mould growth on ceilings and upper walls.
Closed windows and limited airflow trap moisture indoors.
Some black mould species, including Stachybotrys chartarum, are associated with health concerns. While not all black mould is toxic, exposure may cause:
Children, elderly residents, and individuals with respiratory issues are particularly vulnerable.
If the mould patch is:
You may attempt DIY cleaning.
If it keeps returning or is spreading, professional assessment is recommended.
For minor cases:
⚠️ Important: Cleaning removes surface mould but does NOT solve internal moisture problems.
Recurring mould usually indicates:
In Singapore’s climate, mould is often a symptom — not the root cause.
As a professional waterproofing contractor in Singapore, our process includes:
We identify hidden seepage using professional assessment methods.
We determine whether the issue is:
Solutions may include:
After fixing the moisture source, we treat the affected area to prevent recurrence.
Many homeowners:
But without resolving water ingress, mould will return. In Singapore, waterproofing failure is one of the most overlooked causes of persistent indoor mould.
You should seek expert help if:
Early intervention prevents structural damage and costly repairs.
Address the root cause, not just the surface.
If you’re experiencing recurring black mould on walls, Contact Triton Construction for a proper assessment. We are Singapore's trusted waterproofing specialist, providing only lasting solutions.