07/16/2026
Water is uniquely destructive because of its ability to exploit the smallest structural oversights through three primary mechanisms: hydrostatic pressure, capillary action, and hygroscopic expansion.
For many flooring failures, the problem starts before the first plank is ever laid. Concrete is porous—think of it as a dense sponge. When the water table rises or drainage is poor, hydrostatic pressure forces water upward through its microscopic pores.
If a v***r barrier or a high-quality moisture mitigant is not applied, that water will reach the adhesive line. In the case of vinyl or engineered wood, this pressure can emulsify the glue, leading to adhesive failure where the floor literally detaches from the subfloor. Even if the adhesive holds, trapped moisture creates a high-pH environment that can attack the flooring backing.
Water’s high surface tension allows it to travel upward in tight spaces (capillary action), meaning a small spill near a baseboard or a slight leak under a dishwasher won’t stay localized. The water finds the expansion gap, the very gaps required for the floor to breathe (per manufacturer specs), and wicks underneath the surface.
Once under the floor, it is shielded from ev***ration. It spreads across the subfloor, saturating the core of the planks from the bottom up. This is why you will often see peaking or crowning in my favorite post subject – LVP - days after a seemingly minor spill was cleaned up on the surface. Remember, this product is not truly “waterproof” like the box claims.
Wood, LVP, and ceramic tile are hygroscopic—they exchange moisture with their environment. When water enters the cellular structure, the cells expand. Because the planks are locked together, they have nowhere to go but up or out. Cupping occurs when the bottom of the board is wetter than the top, causing the edges to curl upward.
When buckling occurs - in extreme cases of water intrusion - the entire floor system lifts off the subfloor, sometimes several inches, because the cumulative expansion of the boards exceeds the expansion space provided at the walls. This can even happen with ceramic tile.
Water does not always need to be a liquid to find its way in. Moisture v***r emission is water in gaseous form migrating through a slab. A slab that looks bone-dry on Friday can become a "sealed" environment once a non-porous floor (like LVP) is installed on Saturday. The v***r that was once ev***rating into the air is now trapped. It condenses back into liquid water under the flooring, leading to mold growth, musty odors, and eventual delamination.
Any way you look at it, water is a killer—its quarry is anything it touches.
