The short answer
Moisture from Below
Moisture is the most common reason luxury vinyl plank floors buckle. Water can seep up through a concrete slab or crawlspace, especially if there is no vapor barrier. In a humid subtropical climate, spring storms and high humidity can add extra moisture to the air and the ground. If your floor sits directly on concrete, that moisture can migrate upward and get trapped under the planks.
Check for signs of water, like a musty smell, dark spots on the subfloor, or a damp feeling in the room. A moisture meter can help you confirm whether the subfloor is wet. If you find moisture, you need to stop the source first. That might mean fixing a plumbing leak, improving drainage, or installing a vapor barrier before you put the floor back down.
- Look for water stains or discoloration on the subfloor
- Feel for dampness in rooms near the floor
- Use a moisture meter to check the subfloor's moisture level
- Inspect for plumbing leaks or roof leaks that could add water
- Consider a dehumidifier in humid months
Missing Expansion Gaps
Luxury vinyl planks expand and contract with temperature changes. They need a small gap around the edges, usually about a quarter inch, to allow for that movement. If the floor is installed too tight against walls or fixed objects, the planks have nowhere to go. When they expand, they push against each other and buckle upward.
Check the perimeter of the room. If you see no gap between the floor and the wall, that is a likely cause. The fix is to remove the baseboard or trim and cut the planks back to create the gap. In some cases, you can also use a transition strip to separate long runs of flooring, which gives the floor room to move.
- Remove the baseboard to check the gap
- Trim the planks with a utility knife or saw
- Use spacers during installation to keep a consistent gap
- Install transition strips in doorways or long hallways
- Ensure the gap is not blocked by debris or underlayment
Uneven Subfloor
An uneven subfloor can also cause buckling. Luxury vinyl is flexible, so it follows the surface below it. If the subfloor has low spots or high spots, the planks can lift and buckle in those areas. This is often a problem in older homes or after water damage has warped the subfloor.
You can check for unevenness by placing a straightedge on the floor and looking for gaps. If you find dips, you may need to level the subfloor with a self-leveling compound. That is a job that requires some skill, so many homeowners call in a local water damage pro to handle it.
How to Find the Water Source
Before you fix the floor, you need to know where the water is coming from. Common sources include a leaking pipe, a faulty dishwasher, or a refrigerator ice maker line. You should also check the roof and windows for leaks, especially after heavy rain. If you live in Rockwall, keep an eye on your roof after hailstorms.
Look for water stains on the ceiling or walls near the buckled area. You can also check the floor's edges for moisture. If you cannot find the source, a water damage inspection can help. The pros use tools like moisture mapping and leak detection to pinpoint the problem without tearing up your whole floor.
- Check under sinks and around toilets for leaks
- Inspect the roof for damaged shingles or flashing
- Look for condensation on pipes in the crawlspace
- Feel the floor near exterior walls for dampness
- Review your insurance policy to see what is covered
When to Call the Pros
Some buckling issues are simple to fix, like trimming the expansion gap. But if the floor is wet or the subfloor is damaged, you need professional help. Local water damage pros can remove the wet flooring, dry out the subfloor, and prepare the area for a new floor. They also have the equipment to handle large water extraction and structural drying.
If you need to replace the floor, the pros can remove the old planks and install new ones. They can also inspect the subfloor for mold or rot, which is a health hazard. Policies vary, and your insurer decides what is covered. If you have water damage, check your policy to see if the repair is covered.
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Call Now (469) 698-4610Frequently asked questions
Can I fix a buckled vinyl plank floor myself?
Yes, if the cause is a missing expansion gap, you can trim the planks. If the subfloor is wet or uneven, you may need professional help. Water damage can lead to mold, so it is sensible to address it quickly.
How long does it take for vinyl plank to buckle after water damage?
It can take days or weeks, depending on the amount of moisture and the temperature. High humidity speeds up the process. You should act quickly to dry the area and fix the source.
Will buckling go away on its own?
No, buckling usually does not resolve on its own. If the moisture source is removed and the floor dries out, it may flatten slightly, but the planks are often permanently warped. You may need to replace the affected planks.