Short answer: the hybrid planks themselves are fine — an SPC or RCB core is waterproof and does not swell. The damage from water under hybrid flooring almost always sits below the planks: a soaked underlay, a swollen particleboard or MDF subfloor, or trapped moisture that turns into mould and odour. Act within 24-48 hours and you can usually save the floor; leave it for weeks and you are looking at a partial relay.
How water gets under hybrid in the first place
Hybrid is a click-lock floating floor. Every plank-to-plank join is a hairline seam, and there is an expansion gap of around 8-10 mm at every wall. Water reaches the subfloor through one of four routes:
- A leaking appliance — dishwasher, fridge water line, washing machine hose — that pools and wicks down the seams over hours.
- A burst or weeping pipe in the wall or under the slab pushing water up through the expansion gap.
- Bathroom or laundry overflow where the silicone perimeter seal has failed.
- Rising damp through a concrete slab that was not moisture-tested before install.
One spilled glass of water will not get under a properly installed hybrid floor. Standing water, repeated wetting, or a slow leak that runs for days will.
What actually gets damaged
The plank stays the same shape. The IXPE acoustic underlay attached to the back of the plank can hold moisture against the subfloor. A timber subfloor — particleboard, ply, or MDF — will swell, lift at the joins, and telegraph that lift through the floor as a hump or a clicking joint. A concrete slab will not swell, but it will hold moisture for weeks and grow mould between the slab and the underlay if it is not dried properly.
First thing to do: stop the source
Before you touch the floor, find where the water is coming from and shut it off. A dishwasher hose, a fridge ice-maker line, a slow shower leak — each one will keep refilling the puddle no matter how much you mop. If the source is not obvious, isolate the water at the meter and check the wall cavity behind the affected room. Photograph the damage now for your contents insurance; most policies cover sudden escape of water but require evidence at the time of the event.
Drying without lifting (small spill, caught early)
If the water has only been there a few hours and the area is small — a metre square or less — you can often dry it in place. Pull the skirting along the affected wall to open the expansion gap, point a fan at the gap for 48-72 hours, and run a dehumidifier in the room. Lift one plank at the edge after a couple of days and check the underside of the underlay with the back of your hand. If it feels cool and damp, keep going. If it feels dry, you are done.
When you have to lift the planks
Bigger spills, longer-sitting leaks, and any case where the planks have started to lift or click apart all need the floor opened up. Click-lock hybrid is one of the easier floors to lift and relay — you work back from the nearest wall, unclick a row at a time, and stack the planks somewhere flat. Once the planks are off:
- Pull the affected underlay strip and bin it. Underlay that has held urine or grey water cannot be reused.
- Check the subfloor with a moisture meter. Concrete slabs should read below 4% (or below 75% RH with an in-situ probe) before you relay. Timber subfloors should read below 12-14%.
- If a particleboard or MDF subfloor has swelled, cut out and replace the affected sheet rather than sanding it flat — sanded particleboard never holds again.
- Run a fan and dehumidifier on the open subfloor for as long as it takes to hit those moisture targets. In a Sydney summer that might be a couple of days; in a Melbourne winter it can be a week or more.
- Lay fresh underlay and click the planks back down. If any planks have damage to the click profile, replace them — a damaged click joint will reopen.
Stopping it happening again
A few habits and one or two install details prevent most repeat events. Replace flexible appliance hoses every five years. Reseal the silicone bead around bath, shower and laundry tub edges every couple of years. Use a slip mat under the dishwasher and fridge so a slow leak shows up as a stain on the mat before it reaches the floor. On a slab, insist your installer moisture-tests the slab and uses a polythene moisture barrier underneath any acoustic underlay if there is any history of rising damp.
Is hybrid still the right choice?
For most Australian homes, yes. Hybrid handles the kinds of water events that ruin a laminate floor — a kid forgetting the bath was running, a dog kicking over a water bowl, a slow fridge drip caught the next morning. For genuinely flood-prone homes, look at our notes on flooring for flood-prone houses, where tile or polished concrete may suit better. For a closer look at how SPC compares to other hybrid cores, see our hybrid vs SPC explainer, and for the wider category our guide to waterproof flooring options.
Ready to shop? Browse our full hybrid flooring range online, or drop into our Sydney or Brisbane showroom to see the range in person.