What should I do if I find mould in a property I manage or own?

Start with a professional inspection to identify the source. Early detection prevents more serious damage. We offer detailed reports and solutions for property managers, landlords, and strata bodies.

Is mould dangerous to health?

Yes. Some people experience respiratory symptoms, allergies, or skin irritation. It can be particularly harmful to children, the elderly, or those with asthma or immune issues.

How much does a professional mould inspection cost?

Costs vary depending on property size and service required. We offer competitive pricing and provide clear, evidence-based reports.

Self-Check Guide for Mould & Humidity Problems in Homes and Rentals

Why Early Detection Matters

Mould and excess humidity can cause major damage to properties and impact health — especially in rental properties where responsibility between landlords and tenants can get blurred. By performing a quick self-check, you can avoid costly repairs, health issues, and disputes.

FREE MOULD INSPECTION

a mould inspector talking to a property owner about humidity problems in this property

Who Is This Guide For?

Renters

Renters concerned about indoor air quality or leaks.

If you’ve spotted signs of mould or musty smells in your home, this quick guide can help you check common problem areas before things get worse. Learn when to act and what to report to your agent or landlord early.

Homeowners

Worried About Damp, Condensation or Mould?

Homeowners who want to prevent structural damage. Damp walls, musty smells or window fog could be signs of hidden mould. This practical guide helps you self-check your home and spot issues before they grow. Peace of mind starts with early detection and prevention.

Real Estate Agents

Support Your Tenants with a Proactive Mould Guide. Real Estate Agents managing tenant inquiries and property inspections. Equip tenants with this easy self-check tool to catch humidity and mould issues early. A helpful addition to your leasing pack that reduces disputes, keeps properties healthy, and supports faster maintenance response.

Strata Managers

Protect Your Building from Moisture Problems.

Strata Managers responsible for multi-unit building maintenance. Use our inspection guide as a simple resource for residents and building managers to detect early warning signs. Prevent widespread mould issues, protect shared spaces, and maintain compliance with minimal effort.

DIY Mould & Humidity Self-Check Checklis

Use the list below to do a basic inspection:

✅ Visual Signs

Stains, dark patches, or bubbling paint on ceilings/walls
Mould behind furniture, especially near external walls
Visible condensation or dripping windows

✅ Odours & Air Quality

Musty or “earthy” smells in rooms or wardrobes
Lingering damp smell, especially in bathrooms/laundries

✅ Moisture Sources

Leaks from pipes, water heaters, or ceiling cavities
Poor ventilation in kitchens and bathrooms
Damp subfloors or crawlspaces

✅ Test Tools (Optional but recommended)

Use a digital hygrometer to measure indoor humidity
Ideal range: 40%–60% relative humidity
Readings over 60% = higher mould risk

Click here to see some of the tools that we use on mould inspection sites

What to Do If You Find Signs of Mould

Inform your property manager or landlord immediately (if renting) Always keep photos and document all findings.
Avoid cleaning large areas yourself — it can worsen the spread
Book a professional Mould Inspection or Monitoring Service

🔎 Common Signs of Mould Growth or Condensation:

Black spots or fuzzy patches forming on bathroom ceilings, bedroom corners, or around window frames.
Musty smell lingering in wardrobes, under sinks, or behind furniture placed against external walls.
Condensation on windows and glass doors in the mornings — often a sign of poor ventilation and high indoor humidity.

Click here to see some of our photos from previous mould inspections

Real Estate & Strata Support

We work directly with:

Real estate agencies to provide tenant education materials
Strata managers for whole-building assessments and prevention
Property investors to protect asset value and meet compliance

Download our printable guide below to include in tenant welcome packs or lease documentation.

photo of a mould removalist cleaning a wall

Download Our Tenant Mould Guide (Free PDF)

📥 Click to download
Includes:

Self-checklist
Prevention tips
What to do if mould appears
Contact info for professional assessment

Need Help?

Use our Inspection Booking Form or call us for priority support.

📞 1300 333 654
📍 Serving all of Sydney and surrounding suburbs

FAQ

1. Who is responsible for mould in a rental property — the landlord or the tenant?

It depends on the cause. If mould is due to structural issues, leaks, or poor ventilation, the landlord is usually responsible. If it's caused by how the property is being used (e.g. poor airflow, drying clothes inside), the tenant may be liable.

2. How do I know if I have a mould or humidity problem?

Common signs include musty odours, black or green spots on walls or ceilings, condensation on windows, or peeling paint. Use our self-check guide to inspect key areas in your home or unit.

3. Can tenants clean mould themselves?

Small patches can sometimes be cleaned with care, but using the wrong products or methods can make things worse. For persistent or larger problems, it’s best to book a professional inspection.