The short answer
What Causes the Black Stains
Laminate flooring is made of layers with a fiberboard core that absorbs water. When moisture gets past the protective top layer, the core swells and turns dark, often appearing as black or gray patches. This can happen from spills left wet, a leaking appliance, or a plumbing issue underneath.
Another common cause is high humidity in the room, which allows moisture to penetrate the seams over time. Even a small amount of water that sits for hours can cause permanent discoloration. The black color is not just surface dirt; it is a sign of water damage that has reached the inner material.
If you live in Orem, the semi-arid climate with cold snowy winters and hot dry summers can still bring moisture from snowmelt or humidity spikes, so keep an eye on floors near entryways or bathrooms.
How to Check for Moisture Problems
Start by looking for visible signs of water: warped planks, peeling edges, or a musty smell. Feel the floor around the black spots to see if it is soft or spongy, which indicates the core has absorbed moisture. Also check baseboards, walls, and nearby fixtures for leaks or dampness.
If you have a leak detection service available, a pro can use moisture meters to find hidden moisture without tearing up the floor. You can also try placing a dry cloth over the area overnight to see if it picks up dampness. But do not assume the problem is only on the surface.
Use a flashlight to inspect the seams and edges closely, as black lines often appear along the joints where water has wicked in.
- Look for buckling or lifting planks
- Check for a musty or moldy odor
- Feel the floor for softness or give
- Inspect the area around the black spots
- Look under sinks and near appliances for drips
- Use a moisture meter if you have one
What You Can Do Right Away
First, dry the area thoroughly with towels and a fan or dehumidifier. Remove any standing water and keep the room ventilated. If the black spots are small and the floor is still solid, you might be able to clean the surface with a gentle laminate cleaner, but this will not fix the internal damage.
If the floor is soft or buckled, the affected planks likely need to be replaced. Do not try to sand or paint over the black areas, as that will not stop the moisture problem. The source of the water must be stopped first, or the discoloration will return.
Act quickly to prevent mold from developing, but see a doctor if you feel unwell from any musty air.
- Dry the floor immediately with towels
- Run a dehumidifier or fan to reduce moisture
- Do not scrub the black stains with abrasive cleaners
- Avoid walking on soft or buckling areas
- Keep the room ventilated to reduce humidity
- Contact a professional for a thorough water damage inspection
When to Call in the Pros
If the black discoloration covers a large area, or if you suspect a leak behind walls or under the floor, you need professional help. Local water damage pros can assess the extent of the damage and determine if the subfloor is wet. They have tools to detect moisture behind surfaces you cannot see.
Structural drying and dehumidification may be needed if the moisture has soaked into the subfloor or walls. In many cases, the laminate floor itself cannot be saved once it has turned black, because the core is compromised. A pro can help you decide whether to replace just the affected planks or the entire floor.
Your insurance company may cover water damage, but policies vary, and your insurer decides what is covered. Check your policy to see what is included.
How to Prevent It from Happening Again
Prevention starts with keeping moisture away from laminate. Wipe up spills immediately, use mats at entrances and under sinks, and avoid wet mopping. Use a barely damp mop if you must clean, and dry the floor right after.
Check for leaks regularly, especially around appliances, toilets, and water heaters. If you live in Orem, keep the shutoff valve location written down so you can stop a leak fast. Also, maintain indoor humidity levels with a dehumidifier during humid months.
If you are replacing the floor, consider a waterproof underlayment or a water-resistant laminate for areas prone to moisture.
Need help right now?
Phones are answered 24/7 for Orem and nearby communities.
Call Now (801) 876-1119Frequently asked questions
Can black spots on laminate be cleaned off?
No, black spots that come from water damage are not surface stains. They are caused by the fiberboard core absorbing moisture and turning dark. Cleaning will not remove them. The only fix is to replace the affected planks, and even then, you must address the moisture source first.
Will the black spots spread if I leave them?
Yes, if moisture is still present, the discoloration can spread as the water travels along the seams. The floor may continue to swell and buckle. You should dry the area and find the source of moisture quickly to limit the damage.
How do I know if the subfloor is wet?
If the black spots are accompanied by a soft or spongy feel, the subfloor may be wet. A professional water damage inspection can use moisture meters to check the subfloor without removing the laminate. If the subfloor is wet, it needs to be dried to prevent mold and structural issues.