Is Mould Damage Covered by Home Insurance?

Discovering mould in your home is stressful enough. Discovering that your insurance might not cover it makes it worse. Here's what Australian homeowners need to know about mould and insurance.

The short answer

It depends on what caused the mould. Most home insurance policies cover mould damage if it results from a sudden, accidental event that's covered by your policy — like a burst pipe or storm damage. They generally don't cover mould caused by gradual deterioration, poor maintenance, or ongoing moisture problems.

What's typically covered

Insurance is more likely to cover mould remediation when the mould results from:

• Storm damage — a tree falls on your roof, rain enters, and mould grows in the wet areas
• Burst or leaking pipes — a sudden pipe failure causes water damage and subsequent mould
• Accidental water discharge — overflow from a washing machine, dishwasher, or water heater
• Flash flooding — if you have flood cover and water enters your home (check your policy — flood is often an optional extra)

The key word insurers look for is sudden and accidental. If the water event was unexpected and you acted promptly to address it, the resulting mould damage is more likely to be covered.

What's typically excluded

Insurance generally won't cover mould caused by:

• Gradual deterioration — slow leaks that have been dripping for months, rising damp, chronic condensation
• Poor maintenance — failure to fix known leaks, maintain gutters, or address ventilation problems
• Pre-existing conditions — mould that was present before you purchased the property or took out the policy
• Wear and tear — ageing seals, degraded waterproofing membranes, old plumbing
• Failure to act — if you knew about a water issue and didn't address it promptly

Most policies contain an explicit mould exclusion in the general exclusions section. Read yours carefully — the wording varies between insurers.

How to maximise your claim

If you believe your mould damage is covered, here's how to give yourself the best chance:

1. Act immediately

The moment you discover water damage or mould, take action. Insurers expect you to mitigate the damage — that means stopping the water source, drying out affected areas, and preventing the mould from spreading. Delays weaken your claim.

2. Document everything

• Photograph all visible mould and water damage with dates
• Record videos showing the extent of the problem
• Keep a timeline of when you first noticed the issue and what you did
• Save all receipts for emergency repairs, professional assessments, and remediation

3. Get professional assessment

A professional mould assessment provides:

• Species identification — some species are more hazardous than others
• Moisture mapping — shows where water is coming from
• Scope of damage — quantifies the affected area
• Remediation plan — what needs to be done and estimated cost

This report becomes evidence for your claim. It demonstrates the cause, the extent, and the appropriate response.

4. Report to your insurer promptly

Most policies require you to report damage "as soon as reasonably practicable." Call your insurer's claims line, explain the situation, and provide your documentation. Don't wait until the mould has been remediated — the insurer may want to send their own assessor.

5. Don't DIY large mould problems

If you think you'll be making a claim, don't attempt to remediate the mould yourself. Insurers may argue that:

• The damage wasn't as bad as claimed (because you cleaned it before they could assess)
• Professional remediation wasn't necessary (because you managed it yourself)
• You've obscured the original cause

Let the professionals handle it, and let the insurer see the damage firsthand.

Strata and body corporate

For apartment owners, mould damage falls into two categories:

• Common property (external walls, roof, shared plumbing) — the body corporate's building insurance should cover mould caused by insured events affecting common property
• Lot property (internal fixtures, contents) — your own contents or home insurance covers mould damage to your belongings and internal finishes

If the mould is caused by a common property issue (leaking external wall, shared plumbing), notify your strata manager. The body corporate has an obligation to maintain common property under the Strata Schemes Management Act.

What if your claim is denied?

If your insurer denies your mould claim:

1. Request the reason in writing — insurers must explain their decision
2. Review your PDS — check if the exclusion they're citing actually applies to your situation
3. Lodge an internal complaint — the insurer must have an internal dispute resolution process
4. Contact AFCA — the Australian Financial Complaints Authority handles insurance disputes for free
5. Get an independent assessment — if you disagree with the insurer's findings, an independent expert report can support your case

Prevention is cheaper than remediation

Insurance should be your last resort, not your first plan. The cost of preventing mould — proper ventilation, prompt leak repairs, regular maintenance — is a fraction of the cost of remediation and the hassle of an insurance claim.

If you need a professional assessment for an insurance claim, or want to understand the scope of a mould problem before contacting your insurer, we can help. For severe cases, our commercial fogging service can treat entire properties efficiently. Our reports are detailed, evidence-based, and suitable for insurance submissions.