When water gets under laminate flooring, it seeps into the high-density fiberboard (HDF) core, causing the planks to swell, buckle, or delaminate. It also becomes trapped on the subfloor, creating an ideal, hidden environment for mold and mildew to grow within 24 to 48 hours.
Use fans, dehumidifiers, or even a wet-dry vacuum to dry water under laminate flooring and the subfloor. Ensure proper ventilation to accelerate the drying process. You can also use towels to absorb excess moisture.
Unlike solid hardwood, which might survive minor moisture exposure, laminate flooring contains fiberboard core materials that absorb water like a sponge. This absorption causes swelling, warping, and buckling – transforming your once-flat floor into a rippled landscape of damaged material.
While wet laminate flooring will eventually dry out, it can take several weeks or longer to do so on its own. Not only does this increase the risk of mold, but it's also likely the floor will start to degrade and fall apart too.
Beyond structural damage, moisture trapped under laminate creates ideal conditions for mold growth, which can begin within 24-48 hours. Mold doesn't just damage your flooring—it poses health risks to your household.
Within 24-48 hours, mold spores begin germinating when exposed to moisture; in 3-12 days, visible signs appear including discoloration or musty odors; at 2-3 weeks, mold growth becomes extensive and penetrates deeply, making remediation harder.
Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
Carefully examine your laminate flooring for signs of water damage, which may include: Swelling or bubbling along the edges of planks. Discoloration or darkening. Soft spots when you press down.
Some Common Mistakes When Laying Laminate Flooring
How To Draw Moisture Out Of Wood Floors
How to Repair Laminate Flooring
Here is the typical timeline of water damage: Within hours water spreads through porous materials like concrete or brick, causing discoloring. Within 24–48 hours, mold spores begin to color damp surfaces. Within a week, odors, warping, and paint damage starts to appear.
The rule of 3 in flooring is a design principle that recommends using no more than three different flooring materials throughout a home to maintain visual cohesion. This guideline helps you create intentional transitions between spaces without overwhelming the eye.
Main signs your subfloor is rotting from water damage
Tools Needed for Testing Moisture in Laminate Flooring
Moisture Meter: The most accurate way to measure moisture in flooring is with a moisture meter. Look for a pinless (non-invasive) meter, which can measure moisture without puncturing the floor's surface.
Yes. A dehumidifier helps remove excess moisture from the air after water damage. By lowering humidity levels, it speeds up the drying process and reduces the risk of mold growth. However, severe water damage often requires professional drying equipment and water extraction to fully remove hidden moisture.
The average lifespan of laminate flooring ranges from 15 to 25 years. Several factors influence its longevity: Quality: High-quality laminate with a thicker wear layer will outlast budget-friendly options. Installation: Proper installation on a level subfloor ensures greater stability and wear resistance.
Moisture is the biggest threat. Water or steam that gets into the seams soaks into the HDF core and causes it to swell. That swelling leads to warping, buckling, and joint separation — damage that can't be undone. Chemical damage is slower but just as permanent.
Not leaving enough expansion gaps around the room's edges can make the planks buckle or warp, as they don't have space to move. Underlay gives the laminate a cushioned layer and helps reduce noise. Using the wrong type or quality of underlay is one of the most common problems when laying laminate flooring.
If you fit laminate in wet or moisture-rich areas, the floor can become damaged, often beyond repair. The result of water or moisture damage will present in the form of buckling, warping, or cracking. The floor will look bent and out of shape, which is unpleasant to the eye and even dangerous.
Water underneath your flooring does not dry out as quickly compared to surface moisture. All floors have a protective top coating that keeps water from immediately soaking into the boards, however, there usually is not this protective coating on the underneath or sides of the boards.
Key Takeaways. Mold spores can begin to colonize within 24 to 48 hours on water-damaged wood floors. Prolonged moisture exposure can lead to irreversible damage, including warping, delamination, and rot. Rapid drying is critical to keep wood strong and stop further damage.
Symptoms of mold toxicity
Prolonged exposure to mold can lead to chronic health issues and exacerbate existing conditions due to long-term inflammation from constant immune system activation. Inflammation as a result of exposure to mold or mycotoxins can be an acute episode of illness or delayed over weeks to months.
Additionally, spraying a solution of equal parts vinegar and water or a diluted hydrogen peroxide solution into the air can help to kill airborne mold spores.
Urine mycotoxin tests are ideal for testing yourself (and your family members) for mycotoxin exposure. They're absolutely painless, totally non-invasive, and incredibly easy to use. With just a small amount of urine, our experts will be able to spot up to 15 different illness-causing mycotoxins.