How to Keep Your Home Mould-Free During Singapore’s Rainy Season

Rainy days in Singapore don’t just slow down your commute. They also quietly raise the humidity in your home, and that makes it the perfect time for mould to start spreading. If you’ve ever noticed a stronger musty smell, dark patches forming, or moisture clinging to your windows during wet weather, that’s not a coincidence.

The rainy season is one of the most common times we get calls about recurring mould. The good news is that with a few adjustments, you can stay ahead of it.

Why Mould Becomes a Bigger Problem When It Rains

During rainy periods, the moisture in the air rises. Even if you don’t feel it, your walls, furniture, and fabrics are soaking up that excess humidity. With windows staying closed to keep the rain out, rooms don’t get much ventilation. If you’re drying clothes indoors at the same time, the trapped moisture multiplies.

Add in cooler temperatures and less sunlight, and mould starts to grow faster than usual in all the damp corners you barely notice.

Where Mould Shows Up the Most During the Rainy Season

We’ve seen mould appear in homes even when they looked spotless on the surface. During wet weather, it often starts in these spots:

• Behind beds and wardrobes

 • On the ceiling corners of bathrooms and bedrooms

 • Inside closed shoe cabinets and storerooms

 • Around window sills, sliding door tracks, and balcony doors

 • Under kitchen sinks or areas where leaks go unnoticed

In smaller rooms with no windows or airflow, it tends to form even faster.

Common Mistakes That Make It Worse

A lot of homeowners unknowingly encourage mould during the rainy season. Some of the most common habits we see include:

• Hanging wet clothes indoors without turning on a fan or opening a window 

• Keeping wardrobe doors closed all day, trapping moisture inside 

• Using cardboard boxes to store items directly on the floor 

• Ignoring minor smells or stains because they seem too small to matter 

• Sealing up the house to stay dry, but forgetting to create airflow

These routines seem harmless at first, but over time, they create the exact environment mould needs to take hold.

How to Prevent Mould During Wet Weather

You don’t need to overhaul your house to fight mould. Simple daily habits go a long way. Start with:

 • Using a fan or dehumidifier in rooms that stay closed for long hours

 • Opening windows briefly after the rain stops to let fresh air in

 • Keeping wardrobe and cupboard doors open slightly every few days

 • Dehumidifying the rooms while keeping drawers, wardrobes, and shoe racks open

 • Wiping down windows, ledges, and glass doors when condensation builds

 • Elevating items off the floor with plastic bins, risers, or shelving units

If you live in a lower-floor unit or a flat with limited natural light, these steps are even more important.

Final Thoughts

In Singapore, we can’t avoid the rain. But we can definitely avoid letting it turn our homes into mould hotspots. The key is staying one step ahead of the moisture. With small, consistent habits, you can keep mould away even during the wettest months.

If you’re noticing signs of mould during this rainy season, Sterng offers free inspections across Singapore. Tap here to WhatsApp us and we’ll help you deal with it before it spreads.