Why laminate fails differently from hardwood
Laminate looks like wood but is not. It is a layer of printed paper under a clear wear coat, glued to a fiberboard core. The wear coat repels a spilled drink for a short while, but the core is made of compressed wood fibers and glue that soak up water at the edges and seams.
That is why laminate often looks fine on top while the damage is underneath. Water gets in through the joints between planks, wicks into the core and swells it. Once the core swells, it does not shrink back.
Signs that laminate is water damaged
- Planks that lift at the edges, creating a raised lip or peaked seam.
- Gaps that open between boards, or boards that buckle upward in the middle.
- Soft, spongy or crumbly spots when you press the surface.
- Dark discoloration or bubbling in the print layer.
- A musty smell that grows when you walk across the floor.
- Click-lock seams that no longer sit flat or have popped apart.
Check the underlayment too. Wet foam or felt underlayment holds water against the subfloor long after the surface dries. Lift a loose plank near the damaged area and look and smell before deciding anything.
What to do right away
Stop the water
Shut the supply to the leaking appliance or fixture. Turn off the dishwasher, washing machine or ice maker line if it is the source.
Soak up standing water
Use towels and a wet vacuum. Do not use a household vacuum on wet floors.
Lift what you can
Remove furniture, rugs and anything that could trap moisture against the floor.
Open the floor
Pull up the first row of planks at the nearest wall if the system allows it, so air reaches the subfloor.
Call before the planks swell further
Swelling starts quickly. Fast drying of the subfloor is what limits how many planks are lost.
Can laminate be saved?
Sometimes, for a narrow window. If the water was clean, the flooding was limited to a few planks and the click-lock seams were never submerged for long, planks can be lifted and dried. If the core has swollen or the edges have lifted, the plank is finished.
Laminate sold as water-resistant still fails when water sits. Resistant describes how long the surface holds a spill, not how the core survives a leak under the floor.
Water on a laminate floor?
Call the 24/7 line. The sooner the subfloor is dried, the fewer planks are lost.
What a professional drying job looks like
A crew starts with moisture meters on the laminate, the subfloor and the nearest wall base. They remove saturated planks and underlayment, because trapped water under an intact floor will not dry on its own. Air movers push air across the exposed subfloor and dehumidifiers pull moisture out of the room.
Daily readings tell the crew when the subfloor is dry. Only then does a water damage repair crew lay new underlayment and planks. Repairing too early seals moisture in, and the new floor fails at the same seams.
Repair or replace the whole floor
| Situation | Usual choice | Why |
|---|---|---|
| A few planks near an appliance, dry subfloor. | Replace those planks. | Click-lock systems allow isolated replacement. |
| Discoloration across a room. | Replace the room. | Moisture has traveled under the planks. |
| Discontinued style or color mismatch. | Replace the room. | A patch will stand out. |
| Subfloor swollen or soft. | Repair the subfloor first. | A damaged base ruins any new floor. |
Insurance and the paper trail
A sudden leak from an appliance is the kind of event home policies are meant for. A leak that has soaked a laminate floor slowly for months is treated differently, and the Washington insurance commissioner notes that most homeowners policies do not cover gradual leaks that continue for long.
Photograph the floor, the source and the moisture readings. Keep the damaged planks until your insurer has seen them if the adjuster asks. We provide written scope and documentation but never promise a claim outcome.
How to check for moisture under the floor
A meter is the only reliable answer, but a few checks cost nothing. Press along the seams with your palm and feel for give. Smell the gap at the wall base. Lift a baseboard or a transition strip and look at the edge of the plank and the underlayment.
A moisture meter pressed against the planks and the subfloor shows whether the base is still wet. Professionals also use thermal imaging to scan large areas for cool, damp patches that the eye cannot see.
Preventing the next laminate leak
- Replace rubber washing machine hoses with braided steel hoses, and check the connections for bulging or rust.
- Put a drain pan with a leak detector under the water heater. The Washington insurance commissioner recommends this and says to check the heater for rust, corrosion or moisture.
- Inspect the dishwasher supply line, the ice maker line and the area under every sink twice a year.
- Leave an expansion gap at the walls when you lay laminate, and keep it clear of caulk that traps water.
- Wipe up spills the same day and keep mats at exterior doors.
A leak sensor costs little and can alert you before the first plank lifts. Place one wherever a pipe or appliance sits above flooring.
When the planks are already swelling
Swollen planks mean the subfloor needs drying right away. See how emergency water removal and water damage repair fit together on a flooring job.
If you live in Woodinville or Lynnwood, the same 24/7 line applies and crews are sent from Bothell.
The published ANSI/IICRC S500 standard is the industry reference for judging when a floor system is dry. It is cited as a standard, not as a certification.
Common questions
Only if the core has not swollen. Planks that are lifted at the edges or soft to the touch cannot be reused. Dry the subfloor quickly either way.
Waterproof or water-resistant labels describe how long the surface resists a spill. Water that gets under the floor from a leak can still damage the subfloor and the underlayment.
The EPA advises drying water-damaged areas and items within 24 to 48 hours to prevent mold growth. Underlayment traps moisture, so check under the planks even if the top looks dry.
Report the leak to your landlord right away and keep photos. Who pays depends on your lease and the cause. Check the lease and ask your landlord and your renter's insurer.