Water ingress is one of the most common building defects in Victoria. Learn how to spot the signs, understand your legal rights under the DBCA, and when to get legal help.
“High and fine literature is wine, and mine is only water; but everybody likes water.”
— Mark Twain
Water may seem harmless, but in the world of domestic construction, it’s one of the most quietly damaging forces. Water ingress—where moisture enters a home due to faulty building work—is a problem that often goes unnoticed until it’s too late. For homeowners, it can be frustrating, costly, and emotionally draining.
At MST Lawyers, we regularly help clients who are dealing with the stress of discovering water damage in their homes—sometimes years after the property was built or purchased. Whether it’s a slow leak from the roof or a more hidden issue beneath the surface, we understand how overwhelming it can feel.
In this article, we explain the most common types of water ingress defects we see in practice, your legal rights, and what you can do if you’re affected.
Your Legal Protections as a Homeowner
If you’re dealing with water damage caused by poor building work, you may be protected under statutory warranties provided in the Domestic Building Contracts Act 1995 (Vic).
Key points to know:
- Statutory warranties apply to structural and workmanship defects for up to 10 years from the occupancy permit date.
- These protections are transferable—you don’t need to be the original owner to make a claim.
- Claims must be brought within the 10-year window under section 134 of the Building Act 1993 (Vic).
If you’re unsure whether your situation is covered, we’re here to guide you through it.
Learn more about your rights under the DBCA ›
1. Roofing Defects
Roofing issues are one of the most common causes of water ingress we see. Unfortunately, they’re also one of the most frustrating for homeowners—especially when the damage appears slowly and silently. Both Colorbond and tiled roofs may be vulnerable to damage or poor installation.
Common issues may include:
- Metal (Colorbond) roofs — Walking on metal sheeting during installation may cause dents that rust over time and allow moisture in.
- Tiled roofs — Cracked or caulked-over tiles may deteriorate further, leading to water seepage that is not always immediately visible.
Left untreated, these defects may allow water to pool in your roof cavity. For some homeowners, the first sign of trouble is water dripping from a light fitting or a sudden ceiling collapse. We understand how confronting and disruptive this can be – and how important it is to act early.
2. Plumbing Defects
Water ingress from plumbing defects may arise in both new and older homes. Some signs are obvious, while others may only become clear when significant damage has already occurred.
What to watch for:
- Retained soil around the base of the home, which may absorb water and allow it to seep into cladding or subfloor areas.
- Lack of ventilation around footings, which can create a damp environment—particularly in older homes on timber stumps.
- Overflowing gutters or misaligned downpipes, which may result in water entering ceiling cavities or wall spaces.
- Underground plumbing defects, including cracked pipes or root intrusion, which are often diagnosed through CCTV plumbing inspections.
Insurance and legal implications:
Licensed plumbers are required to hold plumbing insurance for domestic work, which may provide up to $50,000 in coverage. Records of this insurance are maintained by the Victorian Building Authority (VBA). MST Lawyers can assist in assessing your claim and dealing with the relevant regulatory bodies if required.
Speak to our legal team about your dispute ›
3. Balcony Defects
Tiled balconies are a frequent source of water ingress issues, especially in multi-unit dwellings. These types of defects are commonly the subject of insurance claims made under domestic building warranties.
Defects may arise due to:
- UV exposure that breaks down grout and adhesives
- Failed or penetrated waterproof membranes beneath the tile surface
- Fixtures (e.g. balustrades) that allow water to enter via improperly sealed drill holes
Once water enters below the surface, it may travel into living spaces, ceilings, or structural elements. Consequential works—such as plastering, repainting, and waterproofing—can be costly. In some cases, rectification of a failed membrane may exceed $50,000.
What to do if you’re affected
- Record the problem — Take photos, videos, and keep a written timeline.
- Seek expert help — A qualified builder, plumber or inspector can help identify the cause.
- Get legal advice early — We can help you understand who may be responsible and what options are available.
Whether the defect was caused by a builder, plumber, or another party, we’ll work with you to get clarity, protect your position, and seek resolution.
We’re here to help
At MST Lawyers, we understand the disruption and stress water ingress can cause—not just to your home, but to your peace of mind. If you’re dealing with unexpected damage, unclear builder responses, or just don’t know where to start, we can help.
We regularly act for homeowners, buyers, and property investors in:
- Domestic building contract and warranty disputes
- Claims against builders, plumbers, and contractors
- Complaints to the VBA and VMIA
- VCAT proceedings involving water ingress or structural defects
Get Help from an Experienced Construction Lawyer
Article by David Rayment, Senior Associate MST Lawyers
