Residential Window Cleaning Tips for Melbourne Homes When Dealing With Mould on Window Frames

Mould on window frames are more than just unsightly—they can affect your health, damage your windows, and reduce the overall appearance of your home. Melbourne’s changeable weather can create ideal conditions for mould to thrive, especially on neglected or poorly maintained window frames. If you’re seeing dark spots or patches near your windows, this guide will help you address the problem and keep it from coming back.

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Why Mould on Window Frames Appear?

In Melbourne’s temperate oceanic climate, homes are often exposed to both high humidity and cooler temperatures, which can lead to condensation and damp spots—perfect conditions for mould on window frames to appear.

Common causes include:

• Poor ventilation in moisture-heavy rooms
  Bathrooms, laundries, and kitchens often trap steam and humidity. Without exhaust fans or windows opened regularly, moisture builds up on window frames, especially in corners or where airflow is minimal.
• Condensation build-up from temperature differences
  During cooler months, warm indoor air meets cold glass, causing condensation. This repeated moisture exposure creates a damp surface on window sills and frames, encouraging mould spores to settle and grow.
• Leaking window seals or frames
  Cracked, broken, or poorly installed window seals allow rain and moisture to seep in. Over time, this moisture gets trapped inside the frame or wall cavity, leading to internal mould growth that’s harder to detect and remove.
• Infrequent or improper cleaning routines
  Dirt, dust, and organic matter on window frames act as a food source for mould. Without regular cleaning, especially during damp seasons, small patches can quickly develop into larger infestations.

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Signs You’re Dealing with Mould on Window Frames

Recognising mould early can prevent more serious issues. Here’s what to look out for:

• Dark, patchy stains around frames or sill corners
  These may appear black, grey, green, or even orange depending on the type of mould and surface material. They typically cluster in areas where moisture collects.
• A persistent, musty smell near windows
  Even if you can’t see it, mould behind sealant or within timber frames often gives off a damp, earthy odour that lingers in enclosed rooms.
• Discolouration or deterioration of paint and sealant
  Paint bubbling or peeling and sealant turning dark or soft may indicate mould underneath or behind the surface.
• Ongoing condensation on the interior side of the windows
  This is often a sign of poor airflow or failing seals—both of which promote an ideal mould-growing environment.

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How to Remove Mould or Mildew Safely

You can treat small, surface-level mould yourself if the area is manageable and you’re not sensitive to spores. But take proper precautions.

What You’ll Need:

• White vinegar – Naturally acidic and proven to kill mould on non-porous surfaces
• Microfibre cloths – Trap mould particles better than paper towels or regular cloths
• Gloves and a face mask – Essential for avoiding skin and respiratory contact with mould spores
• Soft-bristle brush or toothbrush – Helps scrub affected areas without damaging frame surfaces
• Spray bottle – For applying cleaning solution evenly and safely

Steps:

1. Ventilate the Area
   Open windows and doors or use an exhaust fan. This reduces spore concentration and prevents them from spreading throughout the home.
2. Apply Cleaning Solution
   Spray undiluted white vinegar directly onto the mould-affected areas. Leave for at least 15–30 minutes to allow it to break down mould structures and kill spores.
3. Scrub Gently
   Use a soft brush to loosen mould from the frame. Avoid using harsh pressure that could scratch surfaces or release more spores into the air.
4. Wipe the Area Clean
   Use a clean, damp microfibre cloth to wipe away residue. Rinse the cloth thoroughly or use a new one for each frame to avoid cross-contamination.
5. Dry the Surface Thoroughly
   Moisture is mould’s best friend—so use a dry cloth or towel to ensure all surfaces are bone dry. You may also leave the window open to air dry completely.

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When to Call a Residential Window Cleaning Professional

Professional residential window cleaning in Melbourne is recommended if:

• The mould keeps returning
  This usually signals an underlying moisture problem, like leaking frames or poor insulation, which a professional can diagnose and resolve.
• The affected area is large or on multiple windows
  Larger infestations could pose a risk to health and may require mould remediation alongside a window cleaning service.
• The window is difficult to access safely
  Double-storey homes, high-set frames, or windows above staircases may need rope-access or extension tools best handled by trained professionals.
• The mould has penetrated paint, sealant, or wood
  This indicates deeper contamination. Professionals have commercial-grade products and tools designed to treat both the surface and underlying materials.

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How to Prevent Future Mould Growth

Maintaining a mould-free home involves long-term habits. Prevention is key—especially in Melbourne’s wetter months.

Top prevention tips:

• Improve ventilation year-round
  Install or upgrade exhaust fans in bathrooms and laundries. Leave internal doors open when practical, and ventilate your home daily—even in winter.
• Use a dehumidifier in problem areas
  Ideal for poorly ventilated rooms or properties in low-lying, damp-prone areas. Dehumidifiers reduce air moisture levels and disrupt mould development.
• Schedule regular residential window cleaning
  Professional window cleaning twice a year helps remove build-up and detect early signs of mould. Local Melbourne window cleaners will also be familiar with seasonal risks and typical problem areas.
• Repair damaged seals and cracked window frames
  Leaks let in water and allow cold air to generate internal condensation. Replacing rubber seals or re-caulking frames can make a huge difference.
• Repaint with mould-resistant paint
  Especially important for timber window frames. Use paints or sealants with anti-mould additives to keep moisture out and extend the life of the frame.

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Final Thoughts

Don’t let mould on your window frames go unchecked. Early action protects your home, your health, and your property’s appearance. For persistent issues or hard-to-reach windows, enlist the help of a residential window cleaning expert in Melbourne. Our team offers detailed cleaning, inspections, and solutions tailored to local climate conditions and property types.

📞 Call 1300 30 15 40 or click the button below to request a free, no-obligation quote today.