Luxury vinyl plank flooring is waterproof on the surface. That is not the problem. The problem is what happens to water that gets underneath it. LVP is a floating floor installed without adhesive, and when water infiltrates through seams, wall edges, or from below, it becomes sealed in against the subfloor with no path to evaporate.
Why Is LVP Described as "Waterproof" If It Causes Water Damage Problems?
The surface of LVP is genuinely water-resistant. Spills bead on the surface and can be wiped without damage to the plank itself. The misunderstanding is about direction. LVP resists water from above. The same waterproof property that protects the surface from above now seals moisture in from below, creating a dark, warm, humid environment against the subfloor that is ideal for mold (what restoration professionals classify as microbial growth) growth. The LVP surface continues to look and feel completely normal while the subfloor beneath is actively deteriorating.
How Does Water Get Under LVP in an East Texas Home?
- Seams and transitions: LVP click-lock seams are water-resistant but not waterproof. Water at sufficient volume or sustained duration seeps through the seams and reaches the subfloor below.
- Wall base gaps: Water running along walls reaches the flooring at the base and infiltrates under the edge of the floating floor.
- Subfloor moisture from below: In East Texas crawl space homes, moisture rising from the crawl space migrates up through the subfloor and becomes trapped under the LVP above.
- Slow appliance leaks: Refrigerator water line leaks and dishwasher seal failures release water slowly over weeks, migrating under the LVP across a wide area.
What Are the Signs That Moisture Is Trapped Under LVP?
- Raised or buckled seam edges: water pressure from below lifts the seam edge as moisture expands the materials beneath
- Musty odor without visible source: mold beneath the LVP releasing odor through the seams
- Soft areas underfoot: the subfloor beneath has begun to lose structural integrity
- Buckling at wall transitions: the flooring edge is lifting at the base of walls
An East Texas Story: A Wills Point Kitchen and a Refrigerator Line Leak
A Wills Point homeowner noticed the LVP at one seam in the kitchen had a very slight raised edge over a few weeks. She assumed the flooring had been installed unevenly. When Cantt Restoration assessed the kitchen, we found a pinhole failure in the refrigerator ice maker supply line that had been releasing water at a slow rate for an estimated four to six weeks. The water had traveled under the LVP across approximately 80 square feet of the kitchen floor. The LVP surface looked nearly perfect across this area. Beneath the flooring, the OSB subfloor had absorbed moisture through its full depth and begun to show early mold conditions along the grain.
We used FLIR thermal imaging to map the full extent of the moisture under the LVP without removing the flooring first, confirming the 80-square-foot zone before any demolition decisions were made.
How We Address Moisture Under LVP
FLIR thermal imaging and calibrated moisture meter readings map the extent of trapped moisture without requiring immediate full floor removal. Where moisture is confirmed, we assess whether specialty drying equipment can address the subfloor without LVP removal. Where the subfloor has deteriorated or mold conditions are confirmed, LVP removal and subfloor drying or replacement are required. All scope decisions are documented before any work begins. We follow ANSI/IICRC S500 standards throughout.
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Cantt Restoration serves all of East Texas , Smith County, Cherokee County, Wood County, Gregg County, and beyond. Based in Arp, TX. Call (903) 251-9525.
This content is for general informational purposes only and does not constitute legal, insurance, or professional restoration advice. Cantt Restoration is not a policy expert, attorney, or public adjuster. Every loss situation is unique. For questions about your coverage, contact your insurance company, adjuster, or agent directly. For assessment of your specific situation, consult a qualified restoration professional. Cantt Restoration follows ANSI/IICRC S500, S520, and S740 standards on every job.
Frequently Asked Questions
Is luxury vinyl plank flooring waterproof?
The surface of LVP is water-resistant, but water that gets under the flooring through seams, wall edges, or from below is sealed in against the subfloor. LVP can trap moisture and create hidden mold conditions while the surface looks completely normal.
How do I know if there is moisture trapped under my vinyl plank floor?
Signs include raised or buckled edges along seams, a persistent musty odor without a visible source, soft spots underfoot, and buckling at wall base transitions. Thermal imaging and moisture meters can detect trapped moisture without full floor removal.
What happens to the subfloor under wet LVP flooring?
Moisture trapped under LVP creates ideal mold conditions against the subfloor: dark, humid, and warm. This leads to OSB and plywood deterioration and mold growth developing invisibly under the flooring, sometimes for months before any surface sign appears.
Can LVP be saved after water damage, or does it need to be replaced?
LVP planks themselves are not damaged by water. In some cases, the planks can be lifted, the subfloor dried or repaired, and the same planks reinstalled. Where planks were cut to size or damaged during removal, replacement may be required. Assessment happens before any demolition decision.
What should I do first if I suspect moisture under my LVP?
Call Cantt Restoration for a moisture assessment before doing anything else, including pulling up the flooring. Thermal imaging can map the moisture extent without removal, preventing unnecessary demolition and protecting documentation of original conditions.