What is a mould inspection and what does it involve?

What is a mould inspection?

A mould inspection is an independent, visual inspection of a home for visible mould and for the signs of moisture that allow it to grow. Mould needs moisture, so the inspection is as much about where water is getting in, condensing or failing to dry out as it is about the mould itself. We look at the accessible areas, record what we see with photos, and explain the likely causes and practical next steps in plain language.

It is an inspection you commission for your own information. It is not a statutory inspection, and it is not a health or medical assessment. The report describes the building, not anyone's health. If you are worried about how mould is affecting you or someone in the home, speak with a doctor.

For the bigger picture on why mould returns and what to do about it, start with our guide to why mould keeps appearing in your home. This guide focuses on the inspection itself: when it is worth arranging, what it looks at, what you receive and what it does not cover. Our mould inspections page sets out the service in brief.

When is a mould inspection worth arranging?

The most common reason is mould that keeps coming back. Cleaning removes what you can see, but while the moisture is still there the mould tends to return, often in the same places. An inspection looks for the source so the fix is aimed at the cause rather than the surface.

Other common situations include a musty smell with no obvious mould, damp patches or staining on walls and ceilings, condensation on windows every winter, a leak or water damage that has been repaired but still shows signs of moisture, and mould noticed at an open inspection when you are considering buying. Rental providers, property managers and renters also ask for an inspection when they need an independent record of what is visible and why.

If the concern is broader than mould, for example you also want to know about the condition of the home generally, a general condition and timber pest check covers moisture signs among many other things. Our guide to what a building and pest inspection covers explains the difference in scope.

What does the inspection look at?

Inside the home, we look at the accessible areas for visible mould, staining and damp patches on walls, ceilings, floors, around windows and inside cupboards and wardrobes. Wet areas get particular attention: bathrooms, laundries and kitchens, including the exhaust fans and vents that are meant to move moist air out.

We look for signs of where the moisture may be coming from. Common sources are condensation on cold surfaces, roof and gutter leaks, plumbing leaks, water getting in around windows and doors, and damp rising from the ground or coming through walls. The pattern of the mould often points to the source: growth in the corners of cold external walls suggests condensation, a stain that spreads from a ceiling edge suggests a roof or gutter problem.

The roof space and the subfloor are inspected where there is safe and reasonable access. These are often where the cause shows most clearly, in a wet patch under a roof valley or in a damp, poorly ventilated subfloor. Outside, we look at gutters, downpipes, drainage and the ground levels against the walls, because water directed at the base of a wall is one of the most common reasons for damp inside.

The inspection is visual and non-invasive. Nothing is opened up, no fittings are removed and nothing is sprayed or treated. Where an observation points to a hidden source, the report says so and suggests who should investigate.

What do you receive afterwards?

You receive a written report describing where visible mould and signs of moisture were observed at the time of the inspection, with photos supporting the key observations. The report sets out the likely causes, based on what could be seen, and practical next steps, such as fixing a leak, improving ventilation, or having a licensed plumber, roofer or other tradesperson look at the source.

It also lists the areas that could not be inspected and why. Furniture against walls, locked rooms, a roof space without a hatch or a subfloor with no access point all become limitations, and mould or moisture may exist there. We are happy to talk through the report with you and explain anything that is unclear.

If sampling or laboratory testing is needed for your situation, we can talk about arranging it when we confirm the scope. For most homes, the visible signs and the likely cause are enough to decide the next step.

What does a mould inspection not cover?

Being clear about the edges avoids disappointment later. A mould inspection:

• Is not a health or medical assessment, and does not say whether the mould is affecting anyone's health. Speak with a doctor for that.
• Does not see inside walls, under floor coverings or behind fixed cabinetry, so it cannot confirm that a home has no hidden mould.
• Does not confirm the cause. Likely causes are based on what could be seen; confirming or fixing the source may need a plumber, roofer or another tradesperson.
• Does not remove mould or carry out repairs.
• Is not a statutory inspection, a certificate or a warranty, and is not legal advice about a rental property.
• Describes the home on the day. Mould can return if the moisture that feeds it is not dealt with.

For a rental property, the report records visible condition. Rental providers should confirm the current minimum standards and timing with the relevant authority or their property manager, and our guide to rental property inspections in Victoria explains the different records that apply to a rental. A routine rental check is the better fit when you want a room by room record of the whole property rather than a focused look at mould and moisture.

How do you prepare for the day?

A little preparation makes the report more useful. Tell us where you have seen mould or damp, when you first noticed it, and whether it changes with the seasons or the weather. Share anything you know about past leaks, water damage, repairs or earlier reports.

Arrange access to the affected rooms, the wet areas, the roof space and the subfloor, and move stored items away from the walls where practical. If the home is rented, agree on access with the renter or the rental provider first, with proper notice. Where you need to clean before we arrive, photograph the mould first so the pattern is on record.

Then tell us about the property and what you have noticed, and we will confirm the scope and provide a quote before anything is arranged. Call or message us on 0406 194 163, or send an enquiry and we will come back to you.

Sources and authorities

These public sources set out the requirements this guide refers to. They are the places to confirm what applies to your property; we help you understand and prepare for them.

• Building and Plumbing Commission: the building standards and regulations that apply in Victoria, including changes that respond to condensation and mould.
• Better Health Channel: how mould affects health and how to manage it at home; for personal health concerns, speak with a doctor.