Short answer: often, yes, if the water was clean and it's dried within 24–48 hours (so drying needs to start straight away). Carpet soaked by a burst pipe or a leaking hot water system can usually be extracted, dried and cleaned. Carpet soaked by sewage, a toilet overflow or dirty floodwater usually isn't safe to keep.
That window comes from WA Health's 2024 report on indoor mould, which notes that mould can grow within 24 to 48 hours in flood-affected homes. Here's what to do first, and how our family-owned Byford team works out whether carpet in a Perth home is worth saving.
What to do first after a burst pipe or flood
- Stop the water at the source. Turn off the water at the main stop tap next to your water meter (Water Corporation explains how) and call a plumber. There's no point drying carpet while water is still coming in.
- Stay safe around power. Don't stay in a flooded room while the power is connected, and never touch electric wires, even if you think they're not live. HealthyWA advises not switching on affected electrical or gas equipment until a licensed electrician or gas fitter has checked it.
- Photograph everything before you move it. Moneysmart recommends photos and video of the original damage for your insurance claim.
- Call your insurer early, and check before paying for repairs, as some insurers need to approve work first.
- Follow our checklist. Our flood damage cleaning page has six steps for removing standing water safely, moving furniture and getting air moving.
A few don'ts: don't run petrol or diesel generators or pumps indoors, where the fumes can harm your health; don't pull up or drag whole sections of wet carpet off the smooth edge yourself, as wet carpet stretches and tears easily; and don't throw out repairable items before photographing them and speaking to your insurer, unless they're a health risk. Then call us on 0420 731 775.
Clean, grey or black water: the source decides
When you call, we'll first ask where the water came from. WA Health's mould guidelines sort water into three categories, the same ones the restoration industry uses under the IICRC S500 water damage standard:
- Category 1, clean water: broken supply pipes, taps, a split flexi hose, a leaking hot water system, rainwater. Carpet is often salvageable if drying starts quickly.
- Category 2, grey water: washing machine or dishwasher overflows and drain water. The carpet needs thorough cleaning and sanitising, and the underlay is normally removed and replaced rather than dried.
- Category 3, black water: sewage, toilet overflows containing waste, and floodwater from rivers or streams. Carpet and underlay soaked by it generally aren't safe to keep, and HealthyWA advises assuming anything touched by wastewater is contaminated.
Two catches. The IICRC standard notes that time and temperature can change water's category, so a clean leak left for days in a warm house becomes a bigger problem. And stormwater is judged on what it carries: rain blown under a sliding door isn't the same as muddy runoff across garden beds, which is why we assess it on site.
The underlay problem on a Perth concrete slab
In a Perth home on a concrete slab, carpet sits on foam or rubber underlay laid straight over the concrete. The underlay soaks up water like a sponge, the slab won't let it drain, and the carpet backing slows evaporation. That's the trap: after a day or two of fans the pile feels dry, but the underlay is still wet, and soon the room smells musty.
WA Health's guidance says the subfloor under the carpet must be cleaned and dried too, and its mould report notes that mould can grow on the underside of carpet and underlay, out of sight. So don't trust the surface: have it checked with a moisture meter, or, wearing gloves (smooth edge is sharp) and a P2 mask and goggles if it smells musty, gently lift one corner straight up to feel the underlay without dragging the carpet.
Can you dry carpet underlay, or does it need replacing?
If the water was clean and caught early, underlay can sometimes be dried in place with strong extraction and airflow. It's usually replaced after grey or black water, after more than a couple of days wet, when it smells or is breaking down, or when it was due for replacement anyway.
If the underlay does need replacing, new underlay is fitted and the carpet re-stretched by a flooring installer. We handle the extraction and drying, then clean and deodorise the carpet once it's back down.
How long does flooded carpet take to dry?
For a clean-water leak that's extracted quickly, WA Health's guidelines aim for carpet and backing to be dry within 24–48 hours using extraction, a dehumidifier and fans, though complete drying of damp building materials can take days. Yours depends on how much water went in, the underlay, the weather and how fast it came out.
The big difference with professional drying is extraction: every litre pulled out is a litre your fans don't have to evaporate. That's why we extract first, then set up industrial air movers and dehumidifiers.
Will a dehumidifier dry out wet carpet?
It helps, but on its own it's slow, because it dries the air rather than the carpet. It works best after extraction, alongside fans. A few practical tips, mostly from WA Health's guidance:
- Angle fans so air moves across the carpet, not straight down onto it.
- Avoid hot air from heaters, which WA Health says can dry the surface and trap moisture inside.
- Open windows on dry days when outdoor humidity is low. On humid or rainy days, it's usually better to close up and let the dehumidifier work.
- Keep extension leads and power boards away from wet areas.
Fans and a hired dehumidifier can be enough for a small clean-water spill caught straight away. Once water has spread across a room or soaked deep into the underlay, it usually needs professional water extraction and drying.
Signs wet carpet can't be saved
Even with good drying, some carpet doesn't make it. Check for:
- A musty smell that stays after the carpet feels dry. WA Health lists musty smells as a sign of mould, even when none is visible.
- Delamination: the backing separating, showing as ripples or bubbles that won't lie flat.
- Visible mould on the back of the carpet or the underlay: fuzzy, smudged or discoloured patches.
- Black water, or carpet that has sat wet for several days.
Found mould?
WA Health advises that children, pregnant people, anyone with asthma, allergies or a lung condition, and anyone with a weakened immune system avoid mouldy areas where possible and leave the clean-up to others.
For small patches on hard surfaces like skirting boards, HealthyWA says soapy water is usually enough. Wear rubber gloves, a P2 mask and safety goggles, test any product on a hidden spot first, and never mix cleaning products, as harmful gases can result. Mould over about a square metre, across several rooms or after black water is typically a job for professional mould remediation.
Summer leaks and winter storms around Perth
In Perth's warmer months, water damage often starts inside: a split flexi hose under a sink, a leaking hot water system, a washing machine inlet hose that lets go, or a blocked air-conditioner drain line dripping through a ceiling. A slow leak inside a built-in robe can soak the underlay for days before anyone notices.
In winter, homes along the foot of the Darling Scarp, in suburbs like Byford, Armadale and Kelmscott, can cop stormwater running off higher ground and in under doors. That water has usually crossed gardens and paving, so it needs assessing before deciding the carpet is safe to keep. As a Byford-based cleaning team, we're close by.
After drying: cleaning and deodorising
Drying is only half the job. As carpet dries, water wicks soil from the backing up into the pile (the browning you sometimes see), and whatever the water carried in is still in the fibres. Once it's properly dry, a hot water extraction clean with deodorising freshens it up. Our carpet steam cleaning uses one of Perth's biggest truck-mounted machines, and after a standard clean, carpets typically dry in 2–4 hours.
If a couch or mattress got wet with clean water, the order is the same: extract, dry, then clean. Anything touched by sewage or other wastewater should be treated as contaminated, and HealthyWA warns that flood-soaked inner spring mattresses are difficult to treat and may need to be thrown away. For pieces worth saving, see our upholstery cleaning service.