External Water Damage in Strathfield: Who Is Responsible and Will Insurance Cover the Repairs?

External Water Damage in Strathfield: Who Is Responsible and Will Insurance Cover the Repairs?

By Michael Nguyen | AAA Mould Removal | Strathfield, Sydney NSW

Water damage doesn't always start with a burst pipe or overflowing bathroom. Sometimes, moisture enters a building from the outside, gradually damaging internal walls, plasterboard, insulation and structural components.

During a recent water damage remediation project in Strathfield, Sydney, our team at AAA Mould Removal worked at a property affected by water damage to an internal wall.

Water damage to paint and plasterboard

This raises an important question for homeowners:

Who is responsible for external water ingress, and could your home insurance cover the resulting damage?

The answer depends on how the water entered the property, what caused the damage, who is responsible for maintaining the affected building components, and the terms of the applicable insurance policy.

What Is External Water Ingress?

External water ingress occurs when water penetrates a building from outside through an opening, defect or failure in the building envelope.

Common sources include:

- Deteriorated external wall waterproofing or sealing

- Defective window and door flashings

- Roof leaks and damaged roof coverings

- Cracked external render or masonry

- Failed balcony waterproofing systems

- Blocked or defective drainage systems

- Storm-driven rain entering through damaged building components

Once water enters a wall cavity, it can travel through insulation, timber framing and plasterboard before visible damage appears internally.

This is why professional moisture investigations are important. The visible stain may represent only a small part of the affected area.

Our Strathfield Water Damage Project

The accompanying photograph was taken at a property in Strathfield where AAA Mould Removal carried out water damage remediation work.

The image illustrates how moisture damage can affect internal wall finishes and why identifying the source of water ingress is essential before reinstatement.

Water-damaged walls may require further assessment to determine whether moisture remains trapped within concealed building materials.

Depending on the findings, appropriate restoration work may include moisture mapping, controlled removal of non-restorable materials, structural drying and mould remediation.

Importantly, simply repainting a water-damaged wall without addressing the moisture source may allow the problem to recur.

Is External Water Damage Covered by Home Insurance?

External water damage may be covered by home insurance, but not every form of water ingress is an insured event.

For example, a storm may cause sudden damage to a roof, allowing rainwater to enter the building and damage internal plasterboard, ceilings and flooring.

Where storm damage is covered under the policy, the resulting internal water damage may also be covered, subject to the policy's terms and exclusions.

However, insurers commonly exclude damage arising from gradual deterioration, defective workmanship, poor maintenance or long-term water ingress.

There is also an important distinction between:

1. Repairing the cause of water ingress

This may involve replacing defective flashing, repairing waterproofing or correcting a building defect.

2. Repairing the resulting internal water damage

This may involve removing damaged plasterboard, structural drying, mould remediation and reinstating affected internal finishes.

In some circumstances, an insurance policy may cover resulting damage even where the cost of repairing the underlying defect is excluded.

However, this is not automatic and must be assessed against the specific policy wording and cause of loss.

What About Strata Properties in Strathfield?

For apartments, townhouses and strata-managed buildings, responsibility can become more complicated.

Water ingress through an external wall, roof or balcony may involve common property, depending on the registered strata plan and applicable legislation.

The owners corporation may be responsible for maintaining certain common property building elements, while an individual lot owner may be responsible for other components.

Insurance responsibility is a separate question.

A strata building insurance policy may respond to certain insured events, but the existence of a common property defect does not automatically mean the insurer must cover all resulting damage.

For these reasons, property owners should establish the source of the water ingress, the relevant maintenance responsibilities and the applicable insurance coverage before committing to extensive repairs.

Why Water-Damaged Walls Should Be Professionally Assessed

One of the biggest concerns with water ingress is the possibility of concealed moisture and microbial contamination.

Moisture can remain trapped behind plasterboard, within insulation or around structural framing even after the visible wall surface appears dry.

Prolonged moisture exposure can contribute to:

- Mould growth within wall cavities

- Deterioration of plasterboard and timber

- Damage to paint and internal finishes

- Persistent damp odours

- Reduced indoor environmental quality

- Increased restoration costs if the source remains unresolved

At AAA Mould Removal, we use professional moisture assessment methods to help identify affected materials and determine an appropriate restoration scope.

Our work is informed by the ANSI/IICRC S500 Standard for Professional Water Damage Restoration and ANSI/IICRC S520 Standard for Professional Mould Remediation.

These industry standards guide professional restoration and remediation practices. They do not determine whether an insurance claim is covered.

What Should You Do Before Making an Insurance Claim?

If you discover water damage to an internal wall, taking the right steps early can make a significant difference.

Step 1: Document the damage. Photograph affected walls, ceilings, flooring and any visible water entry points.

Step 2: Prevent further damage where safe. Arrange reasonable temporary measures to limit additional water ingress and protect the property.

Step 3: Notify your insurer or strata manager. Report the damage promptly and ask about the claims process and required evidence.

Step 4: Obtain a professional assessment. Moisture mapping and building investigations may help establish the extent of damage and identify possible water entry pathways.

Step 5: Obtain an itemised restoration scope. A professional scope can distinguish between source repairs, removal of damaged materials, structural drying, mould remediation and reinstatement.

Keep records of communications, photographs, reports and reasonable emergency expenses.

Professional Water Damage Restoration in Strathfield and Sydney

AAA Mould Removal provides professional water damage restoration, structural drying and mould remediation services throughout Strathfield and greater Sydney.

Our services include:

- Water damage inspections and moisture assessments

- Thermal imaging and moisture mapping

- Structural drying of walls, flooring and building cavities

- Controlled removal of water-damaged materials

- Mould containment and remediation

- HEPA filtration and contamination control

- Itemised remediation quotations and restoration documentation

We work with homeowners, property managers, strata representatives and insurance claimants to help establish the scope of restoration work required.

Frequently Asked Questions

Can insurance cover water entering through an external wall?

Possibly. Coverage depends on the cause of water entry, whether an insured event occurred and the policy exclusions. Long-term seepage and maintenance-related defects are commonly excluded.

Who is responsible for water ingress in a strata apartment?

Responsibility depends on whether the affected component is common property or lot property, the registered strata plan and relevant NSW strata laws. Insurance coverage must be considered separately.

Does water-damaged plasterboard always need replacing?

No. The decision depends on the water category, material condition, contamination, moisture exposure and whether the material can be effectively restored.

Can mould remediation be included in an insurance claim?

Sometimes. Mould remediation may be covered where it results from a covered event, but policies often contain specific mould, gradual damage or maintenance exclusions.

Do you provide water damage restoration in Strathfield?

Yes. AAA Mould Removal services Strathfield and surrounding Sydney suburbs, providing water damage assessment, structural drying and professional mould remediation.

Need Help With Water Damage in Strathfield?

Don't assume that all water damage is your responsibility, and don't begin expensive reinstatement work without understanding the cause.

AAA Mould Removal offers free onsite inspections for remediation quotations and itemised scopes of work to help property owners understand the restoration work required.

Contact AAA Mould Removal

Phone: 1300 739 783

Website: www.aaamouldremoval.com.au

Servicing Strathfield, Burwood, Homebush, Concord, Ashfield and greater Sydney.

Disclaimer: This article provides general information about water damage and insurance. Insurance coverage and legal responsibility depend on individual circumstances, policy terms and applicable laws. AAA Mould Removal does not determine insurance liability or guarantee claim acceptance.

About the Author

Michael Nguyen | Water Damage & Mould Remediation Specialist

Michael is an experienced water damage restoration and mould remediation professional with over five years of industry experience. He holds multiple industry qualifications, including:

- IICRC Certified: Water Damage Restoration Technician (WRT), Applied Microbial Remediation Technician (AMRT) and Applied Structural Drying Technician (ASD).

- ACES Indoor Environmental Professional: Training in comprehensive mould and moisture assessments (NAT11429003) and post-remediation verification mould testing (NAT11429007).

- Mould Testing Technician: NAT10913005.

- NSW Licensed Building Contractor: Licence No. 392154C.

- Certificate III in Carpentry: CPC30220.

As part of AAA Mould Removal, Michael combines building construction knowledge with practical experience in moisture investigations, structural drying and professional mould remediation.

His work is informed by the ANSI/IICRC S500 and S520 industry standards.

AAA Mould Removal | AAA Remedial Building Services

IICRC Certified Firm No. 70105048

NSW Company Contractor Licence No. 459856C