Solid wood floors, including the narrow oak strip common in older Denver bungalows and the wider planks in newer homes, absorb water through their edges and undersides. When the bottom of a board takes on more moisture than the top, the edges rise and the center dips. That is cupping. If someone sands the raised edges flat while the floor is still wet, the board can later dry into a crown, with the center higher than the edges, and the finish will be gone.

Engineered wood, laminate and vinyl plank behave differently. Engineered floors have a thin wood layer over plywood or similar core and can delaminate. Laminate with a fiberboard core usually swells at the seams and does not recover. Vinyl plank resists water itself, but it can trap water underneath against the subfloor.

What drying a wood floor can look like

Every floor is different. This sequence shows the general shape of it.

First hours
Standing water is extracted, sometimes with specialized floor mats that pull water from between and under boards. Rugs and furniture come off the floor.
Day one
Moisture readings are taken across the floor and in an unaffected room for comparison. Cupping may already be visible.
First several days
Dehumidifiers and air movers run, sometimes with drying mats or panels. The subfloor below, if reachable from a basement, may be dried from underneath too.
As readings fall
Cupping often begins to flatten. Readings are compared to the dry reference area.
After drying is confirmed
The floor is left to acclimate before any decision on sanding, refinishing or replacement.

Judging the floor

  • IfBoards are cupped but readings are still highThenKeep drying. Do not sand or refinish yet.
  • IfBoards flattened after dryingThenA screen and recoat or a full refinish may be all that is needed.
  • IfBoards are buckled up off the subfloorThenSome boards may need to be removed. Ask whether partial replacement and blending is possible.
  • IfLaminate seams are swollenThenLaminate rarely recovers; replacement is usually discussed.
  • IfWater sat under vinyl plankThenPlanks may need to be lifted so the subfloor can dry and be checked for odor or staining.

Common questions

Does Denver's low humidity help a floor dry faster?
Dry outdoor air can help, but a closed house in winter is a different environment, and the moisture is in the wood and subfloor. Readings, not climate, tell you when it is dry.
Should I put fans on the floor myself while I wait?
Moving air helps, but heat and fans alone can dry the top of the board faster than the bottom. Get the water extracted and ask for moisture readings.

General information for Denver, not a quote or professional advice. In an emergency, call 911.