Every so often I get a call that goes like this. The floor went in six or eight months ago. It looked great. Now there are gaps at the seams you can catch a fingernail in, or the planks have lifted into a ridge down the middle of the room, and nobody can figure out what happened.
Most of the time the answer is something that happened before a single plank went down. The laminate never got a chance to settle into the house.
I have been installing floors in Durham and around the Triangle since 2010, and acclimation is the step I see skipped more than any other. It is boring, it costs nothing, and it takes patience instead of skill, which is probably why it gets rushed. So here is what it actually is, how long it takes in a Durham house, and what it looks like when somebody skips it.
What Acclimation Actually Means
Laminate is mostly compressed wood fiber under a printed layer and a wear coat. That core is not plastic. It takes on and gives up moisture from the air around it, and when it does, the plank changes size slightly.
Acclimation just means letting the planks sit inside your house long enough to reach the same moisture content as the air they are going to live in permanently. A box that has been on a warehouse floor, then a truck, then your garage in August is carrying a different amount of moisture than the air in your living room. Install it that day and the plank will change size after it is locked into place, which is the worst possible time for it to happen.
That is the whole idea. There is nothing complicated about it. You are just letting the material and the room agree with each other first.
The Short Answer: 48 to 72 Hours, in the Room
For most laminate going into a Durham house, plan on 48 to 72 hours of acclimation inside the room where it will be installed.
Some products call for less. A few rigid core and moisture resistant products advertise little or no acclimation requirement, and depending on the core construction that can be legitimate. Some products call for more, especially if the material has been sitting somewhere cold or damp. The manufacturer’s installation sheet is the authority, and it matters for a practical reason beyond the floor itself: ignoring it can void the wear layer warranty on a product that otherwise carries coverage for fifteen years or longer.
We read the sheet on every job. If the sheet says 48 hours, we wait 48 hours.
How to Acclimate Laminate Correctly
The waiting only works if the material is waiting in the right place, under the right conditions.
Put the boxes in the actual room. Not the garage, not the carport, not a spare bedroom with the door shut and the vent closed. The garage is the most common mistake by a wide margin, and in a Durham summer a closed garage can sit twenty degrees warmer and far more humid than the living room twenty feet away.
Lay the boxes flat and stack them loosely, not standing on end. Standing boxes let the planks bow under their own weight.
Keep them a few inches off exterior walls and out of direct sun from a window.
Run the HVAC at normal living conditions the entire time. This is the part people miss during a renovation on an empty house. If the thermostat is off because nobody is living there, the material is acclimating to conditions that will not exist once you move in. It needs to acclimate to the house you are actually going to live in.
Leave the boxes sealed unless the manufacturer says otherwise. Some brands want them opened, most do not.
Why This Matters More in Durham Than It Would in Denver
We live in a humid subtropical climate, and it is not a small factor here. NOAA’s North Carolina State Climate Summary describes the state as having a humid climate with very warm summers, driven in large part by the Bermuda High off the Atlantic coast pulling moisture northward through the summer months. That is the air your floor lives in from roughly June through September.
Then in January the heat runs, the indoor air dries out, and the same floor is living in completely different conditions.
That swing is the reason acclimation and expansion gaps matter so much more here than they do in a dry climate. A laminate floor in the Triangle expands and contracts through the year no matter what you do. Your job as the installer is to make sure it starts at a sensible middle point and has somewhere to go when it moves. Skip the first part and the second part cannot save you.
The season the material shows up in matters too. Material delivered in August has usually been sitting in humid air and needs to dry down slightly. Material delivered in January is often drier than the house and will pick moisture up. Both need the same 48 to 72 hours, but they are moving in opposite directions, and that is worth knowing if you are watching your own project.
If you want the longer version of how our climate treats floating floors, we covered plank selection for exactly this problem in our post on the best laminate for Durham’s humidity. The same physics applies to solid wood, which we wrote about in how long new hardwood should acclimate in a Triangle home, and in more detail in how Triangle humidity affects hardwood floors.
What Skipping It Actually Looks Like
Here is what shows up on the service calls, and roughly when.
Peaking and buckling, usually the first summer. The planks expanded after installation, ran out of room at the walls, and had nowhere to go but up. You get a ridge where two planks push against each other, or a section that lifts off the subfloor entirely. This is the most common failure we see, and it is almost always a combination of material that was installed too dry and an expansion gap that was too tight.
Gapping at the seams, usually the first winter. The reverse problem. Planks installed with too much moisture in them shrank once the heat came on, and the locking joints pulled apart. Thin dark lines appear between boards and they do not close back up completely, because once a click joint separates it does not always reseat.
Separated end joints and a floor that clicks or pops underfoot. The locking mechanism on laminate depends on a tight mechanical fit. Dimensional change stresses that joint, and once it loosens the plank moves slightly every time you step on it.
Warranty denial. When a manufacturer inspects a failed floor, acclimation and expansion gap are two of the first things they look at, and an installation that ignored the printed instructions is not a covered defect.
Any of these on an existing floor is a repair, and repairs on laminate are frustrating because you often cannot fix one section in isolation. Depending on where the damage is and how the floor was laid, getting to a bad plank in the middle of a room can mean unlocking rows back to the nearest wall. That is why a failure that started as a skipped two day wait can turn into a bill for a significant portion of the original job. We see this pattern often enough that it made our list of the most common laminate mistakes we fix for Durham homeowners.
Acclimation Is Not a Substitute for the Rest of the Prep
I want to be clear about this, because people sometimes treat acclimation as the one magic step.
It is not. A properly acclimated floor over a subfloor that is damp or out of flat will still fail. The moisture check on a slab, the leveling, the underlayment, and the expansion gap at the walls all have to be right too, and they all interact. Acclimation handles the moisture inside the plank. The vapor barrier handles moisture coming up from below. The expansion gap handles the movement that happens anyway. Get two out of three and you still have a problem.
If you are working out whether your existing surface can even stay in place, our subfloor checklist for installing laminate over tile, concrete, or hardwood walks through what we check before anything gets ordered.
How We Schedule It
On our jobs the material gets delivered into the house first, into the rooms where it is going, and the install is scheduled around the wait rather than the wait being squeezed around the install.
That is not us being fussy. It is that we are the ones who come back if the floor fails, so the two or three days cost me less than the callback would. If a customer is on a tight timeline and wants us to install off the truck, I will tell them no, and I will explain why in about the same words I have used here.
The practical version for you: when you are getting quotes, ask each contractor how long they acclimate and where the material sits while it does. If the answer is vague, or if the plan is to deliver and install the same morning, that tells you something useful about the rest of their process. It is one of the better questions you can ask, precisely because it is not a question most homeowners know to ask.
Acclimation FAQs
Can I acclimate laminate in the garage?
No. The garage is the single most common acclimation mistake we see in Durham. Temperature and humidity in an attached garage are nothing like the conditions inside your living space, especially in July and August. The material has to sit in the room where it will be installed, with the HVAC running normally.
What if the manufacturer says no acclimation is required?
Some rigid core and moisture resistant products genuinely are less sensitive, and if the printed installation instructions say no acclimation period is required, that is the standard your warranty is measured against. That said, we still bring material into the house ahead of time when the schedule allows. It costs nothing and it removes a variable.
Does acclimation help if my subfloor has a moisture problem?
No, and this is an important distinction. Acclimation balances the moisture inside the planks against the room air. It does nothing about water coming up through a slab or a crawlspace. That requires a moisture reading before the job and a proper vapor barrier during it.
How long should laminate acclimate before installing over concrete?
The same 48 to 72 hours applies, but the slab itself matters more than the timeline. Concrete needs to be fully cured and tested for moisture before laminate goes over it, and a vapor barrier is not optional in that situation.
Can I speed acclimation up by opening the boxes?
Only if the manufacturer tells you to. Most brands specify sealed boxes, and opening them can expose the edges of the stack unevenly, which is worse than waiting the extra day. Follow the sheet.
Does acclimation affect how long the floor lasts?
Not directly, but a floor that develops separated joints and lifted seams in year one will not reach the lifespan it was built for. We put realistic numbers on that in our post on how long laminate flooring actually lasts in a Durham home.
Is this a reason to choose LVP instead?
It can be. Vinyl plank has no wood fiber core and behaves differently with humidity, which is one of several reasons we recommend it for bathrooms, laundry rooms, and basements. We compared the two in detail in laminate versus LVP for Durham homes.
If You Are Planning a Laminate Job
Two or three days of boxes stacked in your living room is a small annoyance. A floor that peaks in July is not.
When we quote a job, the acclimation window is part of the timeline we give you, and the material comes into the house before the crew does. If you want to talk through your project, take a look at our laminate flooring installation services or request a free estimate and we will come measure, check the subfloor, and give you a written schedule that includes the wait.
Vilchis Hardwood Floors & Tile is at 237 Obie Dr, Durham, NC 27713. Call (919) 794-1116, Monday through Friday, 9:00 AM to 5:00 PM. We install laminate in Durham, Raleigh, Cary, Chapel Hill, Carrboro, Wake Forest, Apex, Morrisville, and Hillsborough.
Mario Vilchis is the owner and CEO of Vilchis Hardwood Floors & Tile, a family owned flooring company in Durham, NC serving the Triangle since 2010. He runs the crew that installs every job the company quotes.
