Laminate flooring is built in layers, with a fiberboard core designed for stability—not moisture resistance. Once water penetrates the seams or surface coating, the core absorbs it quickly. Unlike solid hardwood, laminate does not dry back to its original shape.
This structural limitation explains why even minor leaks or prolonged humidity can lead to visible and permanent damage.
Common Causes of Laminate Flooring Water Damage
Water damage rarely happens without warning. In most cases, it develops gradually due to overlooked moisture sources.
Appliance leaks from dishwashers, refrigerators, or washing machines
Bathroom overflows or poorly sealed toilets
Wet mopping or steam cleaning
Spills left unattended
High indoor humidity or condensation
Inadequate subfloor moisture barriers
Over time, moisture seeps into plank joints, triggering expansion and distortion.
Visible Signs of Water-Damaged Laminate Flooring
Recognizing early indicators can reduce repair costs and limit floor replacement.
Key warning signs include:
Swollen or raised plank edges
Buckling or uneven surfaces
Soft or spongy spots underfoot
Gaps forming between boards
Discoloration or surface bubbling
Once swelling occurs, the damage is typically irreversible.
Can Laminate Flooring Be Repaired After Water Damage?
The answer depends on extent and duration of moisture exposure.
Minor Surface Moisture
If water is discovered immediately and has not reached the core:
Dry the area thoroughly using fans and dehumidifiers
Remove baseboards to improve airflow
Avoid walking on the affected area until fully dry
In these cases, the floor may recover visually, though internal weakening can still occur.
Moderate to Severe Damage
When planks have expanded or warped:
Damaged boards must be removed and replaced
Floating floors allow partial plank replacement
Glued installations often require full section removal
Laminate cannot be sanded or refinished. Structural damage means replacement, not restoration.
How to Replace Water-Damaged Laminate Planks
A professional repair typically follows these steps:
Identify and eliminate the moisture source
Remove baseboards and unlock planks back to the damaged section
Replace affected boards with matching laminate
Reinstall flooring and expansion gaps correctly
Color matching can be challenging if the original floor is discontinued or faded.
Preventing Future Laminate Flooring Water Damage
Prevention is often more cost-effective than repair.
Clean spills immediately and avoid excess water
Use damp—not wet—mops
Install waterproof mats near sinks and appliances
Maintain indoor humidity between 30–50%
Seal expansion gaps properly
Avoid laminate in bathrooms or laundry rooms unless rated water-resistant
For moisture-prone areas, modern waterproof vinyl flooring may offer a more durable alternative.
When Replacement Is the Better Option
Full replacement is recommended when:
Swelling affects multiple rooms
Mold develops beneath the flooring
The subfloor shows moisture damage
Planks remain uneven after drying
At this stage, replacing the floor and addressing moisture control provides better long-term value.
No. Once the core absorbs moisture, swelling is permanent even if the surface dries.
No. Water-resistant laminate slows moisture penetration but does not prevent core damage from standing water.
Coverage depends on the cause. Sudden leaks are often covered; long-term moisture issues usually are not.