The ten water damage restoration steps are: make the site safe, document the loss, map the moisture, extract the water, remove what cannot be saved, set the drying system, monitor daily, sanitise and treat, clear the air, and reinstate. Done in that order, a wet room is usually dry in three to five days.
A burst flexi hose under a bathroom vanity can push a couple of hundred litres through a hallway before anyone wakes up.
What happens over the next three days decides whether that is a drying job or a rebuild. And the thing that separates the two is almost never equipment. It is sequence. Most of the expensive jobs we attend did not start expensive. They started with someone mopping the floor, feeling the carpet, deciding it seemed alright, and leaving water sitting inside a wall cavity for a fortnight.
This is the order our crews work in and why each step sits where it does. If you are in the first few hours right now and want the short version, read what to do in the first 24 hours after water damage instead and come back to this later. For something smaller and fresher, cleaning up after minor water damage is the quicker read.
One correction worth flagging up front. An earlier version of this page repeated the industry's "48 hour rule", the idea that clean water becomes contaminated grey water after roughly two days. We have removed it. It is not in the standard, and the section on water categories below explains what the standard actually says.
Key Takeaways
- The first 24 to 48 hours decide whether this is a drying job or a rebuild. Not because of a rule in a standard, but because that is the window in which drying prevents mould.
- Extraction is fast and cheap. Evaporation is slow and expensive. Every litre pulled out mechanically is a litre the dehumidifiers do not have to chase for days.
- Category is about contamination, not volume. It sets the PPE, the controls, and what gets thrown out rather than dried.
- Australia now has its own version of the standard. ANSI/IICRC S500 was adopted by Standards Australia in 2025 as AS-IICRC S500:2025.
- Storm water is not automatically the worst category. The standard's own consensus body said so in March 2026, contradicting a lot of industry content.
- Drying ends when readings say so. Not when the calendar says so, and not when the carpet surface feels dry.
- A burst pipe is not a flood under Australian insurance law. That distinction has a legislated definition and it decides which part of your policy applies.
The 10 Water Damage Restoration Steps, in Order
Power isolation at the switchboard comes before anyone walks in. An electrical hazard is invisible in standing water and a wet powerpoint gives no warning.
Energy Safe Victoria’s guidance on energy safety during floods is the clearest official document on this in the country, and it goes further than most people expect:
- If water has entered the property, do not restore power until the wiring has been tested by a licensed electrician.
- Any appliance that has been inundated stays off until tested.
- Solar and battery systems must be treated as live until inspected by a licensed electrician. Do not switch on the inverter, do not re-energise at the mains. This one catches people out constantly now that panels are on every second roof.
- Gas stays off until a licensed gasfitter has checked the line, because it may have water in it.
Then PPE, then hazard identification. Wet tiles and stairs, unstable ceilings above, and in a pre-1990 building, asbestos. WorkSafe Victoria warns that as wet asbestos-containing material dries it can release airborne fibres, and that flood water can move that material between properties. Do not high-pressure wash it and do not attack it with power tools.
Photograph and video everything before anything moves, including inside cupboards and under furniture.
This is your claim, and the timing is not negotiable. The Insurance Council of Australia advises taking photos before removing any water-damaged or soaked items that may pose a health risk, making an itemised list with brand, model and serial number where possible, and storing damaged items somewhere safe rather than disposing of them. It also says, plainly, do not throw away goods that could be salvaged or repaired, and speak to your insurer before authorising any building work including emergency repairs.
Note the source, the time it started if known, and the highest water level. Mark it on the wall.
Thermal imaging shows temperature differences where water has travelled. Moisture meters confirm what is genuinely wet. You need both, because thermal imaging on its own produces confident-looking pictures of things that are not water.
Together they trace migration behind walls, under floors and into rooms that look untouched. This is what determines where equipment goes, instead of guessing from where the carpet feels damp. Marked reference points get recorded here so that day-three readings mean something.
Bulk water first, mechanically, and as much of it as possible.
Submersible pumps handle depth. Wet vacuums and deep extraction tools handle what has soaked into carpet and underlay. The logic is simple arithmetic: extraction removes water in minutes that dehumidification would take days to pull out of the air.
Wet wall insulation holds water indefinitely and comes out. Saturated plasterboard, delaminated cabinetry and swollen particleboard get cut back to sound material. Skirtings come off so air can reach the cavity.
The US EPA explains the principle behind this better than we can: mould infiltrates porous substances, which makes complete removal difficult, if not impossible. Its list of materials that may have to be discarded includes ceiling tiles, cellulose and fibreglass insulation, plasterboard, and books and papers.
Doing this on day one shortens the whole job. It feels destructive and it is the opposite.
Air movers push air across wet surfaces to lift moisture into the air. Dehumidifiers pull it back out. Both, or neither works.
The number and placement of units is calculated from the affected area and the nature of the materials, not from what happened to be in the van. Cavity walls and timber floors usually need injection drying as well, pushing warm dry air directly into the void through small drilled holes, because that is the only way to reach water a fan will never touch.
Relative humidity, air temperature and moisture readings from the same marked points, logged every day.
Readings that plateau mean something is not drying and the setup needs to change. That is the entire value of daily monitoring: it catches a failing drying plan on day two instead of day nine. Drying finishes when affected materials match the dry standard elsewhere in the building.
Once materials are dry, non-porous surfaces are cleaned and anything that held contaminated water is treated. Antimicrobial treatment where the category or the delay warrants it.
Porous materials that cannot be properly sanitised get removed rather than treated. NSW Health puts the principle in one line: discard material that cannot be cleaned and dried completely.
HEPA air scrubbers under negative pressure capture airborne spores and dust, so that demolition and drying do not contaminate the rest of the house. Containment barriers do the same job physically.
Fogging and deodorisation deal with musty odour that has soaked into the structure. The air-conditioning system matters here too, since contaminated ducting will keep redistributing spores long after the floor is dry.
Structural check, then plasterboard, flooring, skirtings and cabinetry back per the agreed scope. Carpet refitted or replaced and cleaned.
The job is not finished when the property is dry. It is finished when it looks and works the way it did before.
Australia Now Has Its Own Water Damage Standard
In 2025, ANSI/IICRC S500 was adopted and modified by Standards Australia and published as AS-IICRC S500:2025, Standard for Professional Water Damage Restoration. Until then the technical benchmark used in Australia was an American National Standard applied by convention. It is now an Australian Standard.
That is a genuinely significant change and it has barely been mentioned anywhere. The announcement confirms it adopts and modifies the ANSI/IICRC S500 Fifth Edition, 2021, which describes the procedures and precautions for water damage restoration in residential, commercial and institutional buildings, and the systems and personal property within them.
Why it matters to you as a property owner: it gives you something concrete to ask about. A restorer working to a documented standard produces documented drying, and documented drying is what an insurer’s assessor can actually assess. A restorer who cannot tell you what standard their drying plan follows is telling you something.
Why the Water Category Changes Everything
Category is set by what the water has touched, not by how much of it there is. It determines the PPE, the containment, and whether a material gets dried or discarded. A slow Category 3 leak is a far more serious job than a large Category 1 one.
| Category | Typical source | Main risk | What happens to porous materials |
|---|---|---|---|
| Category 1, clean water | Burst supply pipe, tap overflow, rainwater | Low at the source | Usually dried in place |
| Category 2, grey water | Washing machine, dishwasher, shower base | Significant contamination, potential to cause discomfort or sickness | Cleaned and dried, or removed if saturated |
| Category 3, black water | Sewage, waste line backflow beyond a trap, seawater, rising water from rivers or streams | Grossly contaminated. Can contain pathogenic, toxigenic or other harmful agents | Removed and disposed of |
The Category 3 definition above is close to the standard’s own wording, and it is worth reading carefully, because the practical trigger in S500 is not subtle: for Category 2 or 3 water, remediation should happen before restorative drying, and restorers shall use contamination controls and appropriate worker protection. “Shall” is mandatory language.
Category 3 work requires full biohazard decontamination, containment, and disposal of anything porous that absorbed it, because you cannot sanitise the inside of soaked plasterboard. Sewage clean-up always sits here. The CDC is direct on the disposal question: throw away items that cannot be disinfected, including wall coverings, cloth, rugs and plasterboard.
If what you actually want to know is the scale of a loss rather than its contamination level, that is a different axis, and our guide to the severity levels of water damage restoration covers it.
Two things the industry keeps getting wrong
The “48 hour rule” is not in the standard. This is worth stating clearly because we published it ourselves for years.
On the question of how quickly clean water degrades, S500 says only that time and temperature can affect or retard the amplification of contaminants, thereby affecting its category. That is the whole of it. There is no number.
Where the 48 hours came from is almost certainly the US EPA’s entirely separate drying guidance: dry water-damaged areas and items within 24 to 48 hours to prevent mould growth. That is a prevention window, not a contamination clock, and somewhere along the way the industry welded the two together.
The 24 to 48 hour drying window is real, well sourced and the reason speed matters. “Clean water becomes grey water at hour 48” is not.
Storm water is not automatically Category 3. In March 2026 the S500 consensus body issued a position statement clarifying that top-down water ingress, wind-driven rain and water from weather-related events are not automatically considered Category 3. Gross contamination is the test, not the entry route.
That matters commercially. Category 3 scoping means far more demolition and disposal. If a storm-affected job is being scoped as Category 3 by default, ask what the contamination finding was based on.
How Structural Drying Actually Works
Drying is a pressure problem. Air movers raise the water vapour pressure at a wet surface so moisture leaves the material, and dehumidifiers lower the vapour pressure of the surrounding air so it keeps leaving. Fans alone just move humid air around the room.
The mechanism underneath is worth understanding, because it explains a piece of equipment selection that looks arbitrary from the outside.
Refrigerant dehumidifiers work by condensation. They chill a coil, water condenses on it, and it drains away. They are efficient and cheap to run, and they hit a wall in cold conditions. The Munters Dehumidification Handbook, an engineering reference by Lew Harriman, notes that cooling-based systems are very seldom used to dry air below a 40 degree Fahrenheit dew point because condensate freezes on the coil, reducing moisture removal capacity. Roughly 4 degrees Celsius. Once frost forms it insulates the coil, clogs the airflow, and eventually dehumidification stops altogether.
Desiccant dehumidifiers work by adsorption instead. A desiccant with low surface vapour pressure pulls moisture out of the air, gets heated to drive that moisture off, then cools and does it again. Harriman: desiccants are especially efficient when drying air to create low relative humidities. Which is exactly the condition a refrigerant unit gives up in.
So: a refrigerant unit for a warm, wet Brisbane job. A desiccant for a cold Melbourne winter, or for dense materials like hardwood and concrete where the last of the water is held tightly. Often both, because as Harriman puts it, each strength of desiccants covers a weakness of cooling systems and vice versa.
For cavity walls and subfloors, injection drying is the only option that reaches the water at all. And for timber and wood floor drying, the specifics matter enough to warrant their own guide.
The Insurance Part Nobody Explains Properly
A burst pipe is not a flood under Australian insurance law. Since June 2012 Australian policies have used a legislated standard definition of flood, and it is limited to water escaping the normal confines of a lake, river, creek, natural watercourse, reservoir, canal or dam. A pipe is none of those.
The exact wording, per the Insurance Council of Australia and Moneysmart, is: “The covering of normally dry land by water that has escaped or been released from the normal confines of: any lake, or any river, creek or other natural watercourse, whether or not altered or modified; or any reservoir, canal, or dam.” It sits in regulation 34 of the Insurance Contracts Regulations 2017.
Three practical consequences.
Flood cover is not automatic. ICA documents four different ways domestic flood cover is offered: standard inclusion, standard inclusion with opt-out, optional add-on, or not included at all.
A burst pipe is usually handled elsewhere in the policy, typically under an escape of liquid or water damage benefit rather than flood cover. Terms and exclusions vary a lot, so this is a read-your-PDS situation, not a generalisation anyone should make for you.
Storm is a third thing again. Moneysmart notes most policies include storm cover for rainwater, hail and run-off, and ICA notes that even flood-excluding policies may still cover storm or rainwater damage.
On what you can expect from the claim itself, Moneysmart sets out the General Insurance Code of Practice timeframes: the insurer responds within 10 business days, updates you at least every 20 business days, and decides within 4 months. Talk to them before spending money on temporary repairs.
For the mistakes that actually get claims reduced, our guide to water damage insurance claims in Australia goes through five of them.
What this is costing the country
Some scale, so you know you are not unlucky. The Insurance Council of Australia reported, as at April 2026, $4.8 billion in insured losses from extreme weather in 2025 across 294,000 claims, at an average of $16,471 per claim, with total economic cost estimated above $8.6 billion. Ex-Tropical Cyclone Alfred alone accounted for around $1.5 billion and 132,000 claims.
Claims figures develop over time, so treat that as a snapshot rather than a final number.
Stopping Mould Before It Starts
Mould spores are already in every Australian home. What they need is moisture and roughly a day or two on damp plasterboard or timber, which is the whole reason the drying window matters.
The World Health Organization’s guidelines on dampness and mould found that occupants of damp or mouldy buildings are at increased risk of respiratory symptoms, respiratory infections and exacerbation of asthma, and estimated indoor dampness affects 10% to 50% of indoor environments in regions including Australia. Worth noting what WHO also says, because it cuts both ways: the relationship cannot be quantified precisely and no health-based threshold can be recommended. Anyone quoting you a “safe level of mould” is making it up.
During drying, prevention means containment first. Physical barriers and negative air pressure, so that spore movement does not carry into unaffected rooms while you are cutting out wet plasterboard.
Where growth has started, a mould remediation specialist removes and disposes of affected material under containment rather than spraying over it, because dead mould still triggers allergic responses. Humid coastal conditions through a Brisbane or Gold Coast summer shorten the window further. If there is a musty smell and nothing visible, mould inspection and testing before repair work seals the problem inside a wall.
Preventing the Next One
Replace flexi hoses on a schedule
Braided flexi hoses under sinks and behind toilets have a finite life. Replace them before they fail, not after. This is the single most common indoor flood we attend.
Clear gutters before storm season
Blocked downpipes put water against walls. Ten minutes on a ladder against a five-figure claim.
Check where your drainage goes
Surface water should run away from the slab, not towards it. Repeat moisture in the same corner is usually a drainage problem, not a plumbing one.
Leak sensors and a shut-off valve
Sensors under the dishwasher and behind the fridge cost very little. An automatic shut-off valve stops a burst line at 2am while you are asleep.
Service the sump pump twice a year
If you have one, that is the entire maintenance task. Untested sump pumps fail exactly when they are needed.
Know your climate risk, correctly
As at September 2026 the Bureau of Meteorology reports a strong El Nino, with spring rainfall likely below average across south-eastern Australia and parts of Queensland. Which sounds like good news, and is only half the picture: BOM also notes sea surface temperatures 2 to 3 degrees above average off southern NSW and Tasmania, and that warmer waters can enhance the atmospheric moisture and energy that fuel storms. Drier seasonal totals, sharper individual events.
Climate outlook per the Bureau of Meteorology, Southern Hemisphere monitoring, as at September 2026.
What a Proper Scope of Works Should Tell You
A scope of works is the written plan, and it is the document that protects you.
It should list the affected rooms and materials, the category of water, what is being dried versus removed, the equipment on site, and the expected drying period. Daily moisture logs should be attached or available on request.
Vague scopes are a common reason a claim gets queried or reduced. Ask for photos at each stage, including behind walls before they are closed up. If a report cannot tell you which wall was wet, how wet it was, and when it reached dry standard, it is not documentation. It is a receipt.
Frequently Asked Questions
How long does water damage restoration take?
Most residential drying jobs run three to five days, followed by repair work that depends on scope. The variable is not the size of the spill but what got wet and how long it stayed wet. Cavity walls, subfloors and timber floors take longer than carpet and plasterboard. Drying is complete when moisture readings match the dry standard elsewhere in the building, not on a fixed number of days.
Does clean water really become contaminated after 48 hours?
Not according to the standard. ANSI/IICRC S500 says only that time and temperature can affect or retard the amplification of contaminants, with no timeframe attached. The widely quoted 48 hours appears to be a mix-up with the separate US EPA guidance to dry water-damaged areas within 24 to 48 hours to prevent mould, which is a drying window rather than a contamination clock. Speed still matters, for the mould reason.
Can I dry it out myself with fans and a household dehumidifier?
For a small, fresh, clean-water spill on a hard floor, often yes. For anything involving carpet underlay, wall cavities, subfloors or timber, usually not, because household equipment cannot reach water inside a structure or measure whether it has gone. The risk is not that it fails visibly. It is that the surface dries, everything looks fine, and moisture sits in a cavity for a fortnight.
Is water damage covered by home insurance in Australia?
It depends which part of your policy applies, and the distinction is legally defined. Since 2012 Australian policies have used a standard definition of flood limited to water escaping a lake, river, creek, watercourse, reservoir, canal or dam. A burst pipe is not a flood under that definition and is usually handled under an escape of liquid or water damage benefit instead. Flood cover itself is not automatic and is offered in several different ways. Read your Product Disclosure Statement, photograph everything, and speak to your insurer before authorising any work.
When do I need to worry about mould after water damage?
Straight away. The US EPA advises drying water-damaged areas and items within 24 to 48 hours, because in most cases mould will not grow if that happens. Past that window the risk climbs, and porous material that cannot be thoroughly cleaned and dried needs to go rather than be treated. A musty smell with nothing visible is the classic sign of growth inside a wall or under a floor, and it warrants inspection before any repair work seals it in.
Why Australians Choose AllAces for Water Damage Restoration
IICRC-certified technicians
Moisture and humidity measured against recognised standards, not guesswork.
24/7 emergency response
Burst pipes and storms do not wait for business hours.
Documented drying
Daily moisture logs and photo records, in the format insurers actually ask for.
35+ years, 65,000+ jobs
Across Queensland, New South Wales and Victoria.
Our water damage restoration team is on call 24/7. For whole-property inundation, storm events and burst mains, see flood damage restoration. Once carpet and underlay are fully dry, carpet steam cleaning finishes the job. Insurers and brokers can work with us directly through our insurance sector team, and you can meet the IICRC-certified technicians who run these jobs.
Contact the AllAces team on 1800 00 10 10.
More on water damage. This page covers the sequence. For a smaller, fresher spill, read how to safely clean up after minor water damage. For how big a loss actually is, see the severity levels of water damage restoration.
Wet carpet has its own method and its own deadline: how to get water out of carpet before mould sets in. Timber floors are different again, covered in timber and wood floor drying. If it is a unit or apartment, see what to do when your apartment floods.
Water damage restoration and structural drying, 24/7 emergency response. Call 1800 00 10 10.
