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It’s something most homeowners dread noticing.
A dark patch creeping across the ceiling. A musty smell that keeps coming back. Dampness around a wall, bathroom, or corner of the home.
During Melbourne’s colder and wetter months, mould and mildew problems often become more noticeable inside homes, especially when hidden leaks, poor drainage, roof leaks, or excess moisture are involved.
While mould is famous for helping create blue cheese and even Penicillin, it’s definitely not something you want spreading through your home.
Mould and mildew inside the house usually point to two major concerns.
The first is moisture. In many cases, mould is caused by ongoing dampness from a hidden plumbing leak, roof leak, blocked gutter, burst pipe, overflowing drain, or past water damage. If the source of the moisture is not fixed properly, the mould will often keep returning no matter how much cleaning is done.
The second concern is health. Mould spores can affect indoor air quality and may trigger allergies, asthma, respiratory irritation, headaches, and other health issues, particularly for children, older adults, and people with existing sensitivities.
If you’re noticing ongoing dampness, water stains, or recurring mould growth, it may be worth speaking with a local plumber in Moorabbin to investigate whether there’s an underlying plumbing issue contributing to the problem.
Although mould and mildew are closely related fungi, there are some differences between the two. Understanding what you’re dealing with can help you identify moisture problems earlier and prevent more serious damage around the home.
Unfortunately, this is not the type of mould we enjoy seeing.
Mould can begin growing long before it becomes clearly visible. Tiny airborne spores settle onto damp surfaces and quickly begin reproducing when moisture and poor ventilation are present.
In the right conditions, mould can start developing within 24 to 48 hours after water exposure. Over time, it spreads across ceilings, walls, grout, timber, carpet, insulation, and other surfaces.
Mould often appears as:
You’ll commonly find mould in:
Homes with poor ventilation or unresolved moisture problems are especially vulnerable during winter.
Mildew is very similar to mould and is often considered an early stage of fungal growth. Compared to mould, mildew is usually:
Mildew commonly forms in humid areas such as bathrooms, ceilings, shower grout, window frames, and around condensation-prone surfaces.
Although mildew is generally less severe than black mould, it still indicates excess moisture in the home and should not be ignored. Left untreated, mildew can eventually develop into more significant mould growth.
Cleaning mould is important, but it will only solve part of the problem.
If the mould keeps coming back, there may be an underlying moisture issue that needs attention. This could be caused by a leaking pipe, roof leak, blocked gutter, poor drainage, or water escaping from a bathroom, laundry, or kitchen area.
A plumbing inspection report can help identify whether the dampness is linked to a plumbing issue. From there, your plumber can recommend practical steps to fix the cause, reduce further damage, and help prevent the mould from returning.
Once the moisture source has been addressed, the mould itself should be cleaned properly.
Minor surface mould can sometimes be removed with suitable shop-bought cleaners or home cleaning methods, especially on smooth surfaces. Textured areas like tile grout, silicone, porous walls, and timber can be more difficult.
For larger mould patches, recurring growth, or mould linked to water damage, it is best to seek professional cleaning or remediation advice. This is especially important if anyone in the home has asthma, allergies, or respiratory sensitivity.
Bathrooms are one of the most common places for mould and mildew because they deal with steam, water, and limited airflow every day.
To reduce moisture:
Good ventilation helps reduce moisture before it settles into walls, ceilings, grout, and cabinetry.
Use an exhaust fan while showering and keep it running for a short time afterwards. In kitchens, use the range hood when cooking or boiling water.
When the weather allows, open windows and doors to let fresh air move through the home. Even a small amount of airflow can help reduce dampness.
Mould grows best in damp, warm, and poorly ventilated spaces.
To help prevent it:
A few simple habits can make a big difference, especially during Melbourne’s colder months when homes are more likely to stay closed up.
Mould and mildew often come back when the underlying moisture problem has not been fixed.
In many Melbourne homes, that moisture can be linked to a hidden leak, roof leak, blocked gutter, drainage issue, past flooding, or poor ventilation. The key is finding the source before it causes more damage.
Watermaster Plumbing can inspect the issue and help determine whether a plumbing problem is contributing to the mould. If we find a leak or water-related fault, we’ll explain the next steps clearly and help get it sorted properly.
Concerned about mould or mildew in your home? Call Watermaster Plumbing on 1300 737 476 or send an enquiry to arrange an inspection.
Watermaster Plumbing is a local plumber in Sandringham servicing Bayside homes and businesses. We’re setting a new standard in plumbing with licensed, friendly, and highly experienced professionals delivering a range of residential and commercial plumbing solutions.
