How Long Does Laminate Flooring Need to Acclimate?

Skipping acclimation is the number one reason DIY laminate floors buckle, gap, or peak within months. So how long does laminate flooring need to acclimate? The standard answer is 48 to 72 hours in the room where it will be installed, though some products call for as little as 24 hours and a few require more. That waiting period isn’t busywork the manufacturer invented; it’s what lets the planks reach equilibrium with your home’s temperature and humidity so they don’t move dramatically after they’re locked together.

Why Acclimation Matters

Laminate is built on a core of high-density fiberboard (HDF), which is made from wood. Like all wood-based products, it expands when it absorbs moisture from humid air and contracts when the air is dry. If you install cold, dry planks straight off a delivery truck, they’ll swell once they adjust to your warmer, more humid living space, and with nowhere to go, they buckle or peak at the seams. Install planks that are too humid and they’ll shrink after install, opening ugly gaps between boards.

Acclimation lets each plank settle to the moisture level it will live at year-round before you lock it in place. The floor still expands and contracts seasonally, which is why you leave an expansion gap, but acclimation removes the big one-time shift.

The Standard Timeframe

Most manufacturers specify 48 to 72 hours, and following that range keeps your warranty intact. Here’s how it breaks down:

• 48 hours — the common minimum for standard laminate in normal conditions
• 72 hours — recommended when the delivery came from very different conditions (a cold truck, a hot warehouse) or in humid climates
• 24 hours — some modern water-resistant and rigid-core laminates need less; check the box
• Longer than 72 hours — occasionally required for large volumes or extreme seasonal swings

When in doubt, err toward 72 hours. Always follow the specific instructions on your product’s packaging, because acclimation requirements vary by brand and are tied to the warranty.

The Right Conditions for Acclimation

Time alone isn’t enough; the room has to be at normal living conditions during those days. Acclimating in a cold garage or an unheated new build accomplishes nothing because the planks adjust to conditions that won’t exist once you move in. Set the space to:

• Temperature — 60°F to 80°F, ideally the temperature you’ll keep the room at daily
• Relative humidity — 30% to 60%, the same range you’ll maintain long-term
• HVAC running — heating or air conditioning on and operating normally, not just for the acclimation window but going forward

In new construction, make sure concrete has cured, drywall mud is dry, and paint has off-gassed before acclimating, since all of those release moisture that skews the process.

How to Acclimate Correctly

Doing it right takes almost no effort:

1. Deliver the unopened boxes into the actual installation room, not a garage, basement, or hallway
2. Lay the boxes flat and stack them no more than a few high so air can circulate
3. Optionally cut the boxes open or space them apart to expose more surface to room air
4. Keep the room at normal living temperature and humidity with the HVAC running
5. Leave the planks undisturbed for the full 48 to 72 hours before installing

Do not stand boxes on end, lean them against walls, or store them near exterior doors, windows, or vents where conditions differ from the rest of the room.

Common Acclimation Mistakes

These errors quietly sabotage otherwise good installs:

• Acclimating in the wrong room — a cool garage or damp basement won’t match the install space
• Rushing the timeline — installing after a few hours because the schedule is tight is the classic cause of buckling
• Skipping HVAC — acclimating in a house with no heat or AC running gives a false reading of “normal”
• Ignoring the expansion gap — even perfectly acclimated laminate needs a 1/4- to 3/8-inch gap around the perimeter to move seasonally
• Stacking boxes too high or sealed tight — poor air circulation slows the adjustment

What Happens If You Skip It

Installing without acclimation is a gamble that often loses. In the weeks after install you may see the floor peak or tent, where planks push up at the seams because they swelled with nowhere to expand. Or you’ll see gaps open between boards if the planks were too moist and then dried out. Either way, the fix usually means pulling up and reinstalling the floor, and skipping acclimation can void the warranty, leaving you to pay for the repair yourself. A couple of days of patience is far cheaper than redoing the whole room.

Special Cases

Water-resistant and rigid-core laminates are more dimensionally stable and may list shorter acclimation times, sometimes 24 hours or, for some SPC-core products, none at all. Still, unless the manufacturer explicitly says zero acclimation is required, giving planks 24 to 48 hours in the room is cheap insurance. In basements or over concrete, always test subfloor moisture and use the specified vapor barrier regardless of acclimation.

How Climate and Season Affect Acclimation

Where you live and when you install change how much acclimation matters. In humid Gulf Coast and Southeast summers, planks arrive relatively moist, so the concern is later shrinkage and gapping when winter heating dries the air. In arid Southwest and cold northern winters, planks arrive dry and may swell once they reach normal indoor humidity. In both cases, running your HVAC during and after acclimation to hit a steady 30 to 60 percent humidity is what prevents seasonal drama.

The goal isn’t to match the day of installation; it’s to acclimate to the average year-round condition of the home. If you install during a humidity extreme, hold the room at your normal target humidity for the acclimation window rather than whatever the weather happens to be doing that week.

Subfloor Moisture: A Separate but Related Issue

Acclimation handles the air, but the subfloor deserves its own check, especially over concrete. A slab can look bone-dry and still release enough moisture to warp a floor from below. Before installing over concrete:

• Run a calcium chloride or relative-humidity probe test, or tape a plastic sheet down for 24 to 72 hours and check for condensation underneath
• Install the manufacturer-specified vapor barrier or moisture-blocking underlayment if readings are elevated
• Make sure new concrete has cured fully, which can take 30 days or more, before laying laminate

No amount of plank acclimation offsets a wet slab, so treat subfloor moisture as a separate box you must check. A floor can be perfectly acclimated to room air and still fail if moisture is migrating up through the concrete underneath, so both conditions have to be satisfied before you lay the first plank. In practice, that means budgeting time for two separate checks: the multi-day plank acclimation window, and a subfloor moisture test that may need its own 24 to 72 hours to give a reliable reading. Rushing either one is how otherwise careful installs go wrong.

The Bottom Line

So how long does laminate flooring need to acclimate? Plan on 48 to 72 hours in the actual installation room, at 60°F to 80°F and 30% to 60% humidity, with the HVAC running as it will day to day. Deliver the boxes into that space, keep them flat and undisturbed, and always check your product’s specific requirement to protect the warranty. It’s the least glamorous step in a laminate install and one of the most important, so don’t rush it.