If you’ve been shopping for Laminate Flooring in the Cary area, you’ve probably noticed that thickness numbers get thrown around a lot: 6mm, 8mm, 12mm. The common advice is \"thicker is better,\" but that’s not always true for every room or every home. In fact, choosing the wrong laminate flooring thickness for your specific space can lead to wasted money, poor performance, and even installation headaches. Here’s what Cary homeowners need to know in 2026 to get it right the first time.
Why Laminate Flooring Thickness Matters for Your Cary Home
The thickness of a laminate plank directly affects three things: how the floor feels underfoot, how much sound it transmits, and how long the floor will hold up in real world use. Thickness also determines what kind of subfloor preparation you’ll need, which can add time and cost to the project if you’re not planning ahead.
Laminate is a layered product. The thickest layers are typically a high-density fiberboard (HDF) core and an attached underlayment pad. Thicker planks have more HDF material, which makes them more resistant to impact damage and less likely to flex or separate at the joints over time. But thickness alone isn’t a guarantee of quality. A cheap 12mm plank with a low-density core can perform worse than a well-made 8mm board with a dense HDF core. The trick is knowing what to look for beyond the millimeter number.
Cary’s climate adds another layer of consideration. We get real seasonal swings, humid summers, cold winters, and spring rains that push moisture levels up. Thicker laminate with a quality core handle these shifts better because it’s more dimensionally stable. Thin 6mm planks in a basement or a first-floor room with a concrete slab can warp or gap if the subfloor isn’t perfectly prepared. That’s a headache you don’t want six months after installation.
Thickness Options: 6mm vs. 8mm vs. 12mm , Which Is Right for You?
Let’s break down each thickness tier so you can match it to your actual room, budget, and lifestyle.
6mm Laminate: Budget Friendly for Low Traffic Spaces
Six millimeter laminate is the thinnest option you’ll commonly find at big box stores. It’s usually the cheapest per square foot, often $1.50 to $2.50 per square foot before installation. The trade-off is that it feels noticeably hollow underfoot, especially over a concrete slab or a subfloor that isn’t perfectly flat. It also transmits more sound to the room below, so it’s a poor choice for second story bedrooms or offices.
Where 6mm works well: guest rooms, home offices, or closets where you rarely walk. It’s also fine for a rental property where you’re trying to keep costs low and you don’t expect heavy use. But for a Cary living room, kitchen, or hallway with kids or pets, skip it. You’ll feel every step, and the joints can separate after a year or two of normal wear.
8mm Laminate: The Sweet Spot for Most Homes
Eight millimeter laminate is the most common thickness for a reason. It offers a noticeably better feel than 6mm without the extra cost of 12mm. You’ll pay roughly $2.50 to $4.00 per square foot for a good quality 8mm board with a dense HDF core and an attached underlayment. For the average 300 square foot room, that’s a difference of about $300 to $600 over the cheapest 6mm product, money well spent for a floor that feels solid and lasts.
In Cary, 8mm is the go to recommendation for most living rooms, dining rooms, and bedrooms. It provides enough mass to deaden footstep noise, and it handles the seasonal humidity swings better than thinner products. Just make sure the plank has a high density core (look for a rating of 800 kg/m³ or higher on the spec sheet) and a quality AC rating of at least AC3 for residential use. AC3 means the surface is durable enough for moderate traffic, including homes with kids or small dogs.
12mm Laminate: Premium Feel for High Traffic and Open Plans
Twelve millimeter laminate is the thickest residential grade you’ll find. It feels almost like solid hardwood underfoot, solid, quiet, and substantial. You’ll pay $4.00 to $7.00 per square foot for a quality 12mm product, plus installation. The extra thickness also means you can often skip the separate underlayment pad because the attached pad is thicker and more forgiving.
Where 12mm shines: open concept main floors, kitchens, hallways, and any area with heavy foot traffic. It’s also the best choice if you have an uneven subfloor (within reason) because the thicker plank bridges small dips and bumps better than thinner boards. That can save you subfloor leveling costs, which in the Cary area typically run $1.50 to $3.00 per square foot for self leveling compound.
The downside: 12mm is heavier and harder to cut, so installation labor may cost slightly more. It also raises the floor height more, which can create transition issues with adjacent rooms. If you’re tying into an existing floor at a different height, you may need a transition strip or a reducer. That’s a small detail, but it matters for a clean look.
How Thickness Affects Durability, Sound, and Comfort Underfoot
Let’s get specific about what thickness actually changes in your daily life.
Durability: Thicker planks resist impact damage better because there’s more material to absorb force. Drop a heavy pan in a kitchen with 6mm laminate and you’ll likely get a dent or a crack. The same drop on a 12mm board might leave no mark at all. But durability also depends on the AC rating (abrasion class). An 8mm board with AC4 rating (commercial grade) will outlast a 12mm board with AC2 rating (light residential). Always check both numbers. For Cary homes, AC3 is the minimum for any room with daily use. AC4 is worth the upgrade for kitchens, entryways, and homes with dogs.
Sound: Thinner laminate acts like a drum head over a subfloor. Footsteps, pet nails, and dropped objects all sound louder. Thicker planks have more mass, which dampens sound naturally. If you’re installing laminate on a second story, an 8mm or 12mm board with a quality attached underlayment (rated for IIC 50 or higher) will keep the ceiling below quiet. For a first floor on a concrete slab, thickness matters less for sound but more for comfort. A thin plank over concrete feels cold and hard. A thicker board with a foam pad feels warmer and softer.
Comfort underfoot: This is the one that surprises most homeowners. Standing on a 6mm laminate over concrete for an hour, say, while cooking or doing laundry, is noticeably harder on your legs and back than standing on a 12mm board. The extra thickness and the pad beneath provide a bit of cushioning. If you have a kitchen, laundry room, or home office where you stand for long periods, don’t cheap out on thickness. Your knees will thank you.
Installation Considerations: Thickness and Subfloor Prep in Cary, IL
Before you pick a thickness, you need to know what’s under your floor. In Cary, many homes have concrete slabs on grade, especially in basements, additions, and newer construction. Others have wood subfloors over crawl spaces or basements. Each subfloor type interacts differently with laminate thickness.
Concrete slabs: If you’re installing laminate over concrete, you need a moisture barrier. Most quality laminate planks have an attached underlayment that includes a vapor barrier, but if yours doesn’t, you’ll need to lay a 6 mil polyethylene sheet first. This adds about 1/8 inch to the total floor height. For a 12mm plank with a thick attached pad, the finished floor height is about 5/8 inch. That’s enough to require a transition strip if you’re meeting an existing floor that’s lower.
Wood subfloors: Wood subfloors are more forgiving because they’re naturally more level and they don’t transmit moisture. You can use any thickness, but you still need the subfloor to be flat within 3/16 inch over a 10 foot span. If your floor has dips, a 12mm plank will bridge smaller imperfections better than a 6mm plank, which will flex and eventually crack at the seams. Burns Carpentry always checks subfloor flatness before any laminate Flooring Installation, and we’ll tell you honestly if leveling is needed. It’s better to spend $200 on leveling compound than to replace a failing floor in two years.
Acclimation: Laminate needs to sit in the room where it will be installed for at least 48 hours before installation. This lets the boards adjust to the temperature and humidity of your home. Cary’s humidity can vary by 30% or more between seasons, so skipping this step is a recipe for gaps or buckling. Open the boxes, stack the planks loosely, and let them breathe. Burns Carpentry includes acclimation in every project timeline, and we recommend you do the same if you’re doing a DIY install.
3 Pro Tips for Choosing the Best Thickness for Your Space
Here’s the practical advice that separates a floor you’ll love for a decade from one you’ll regret in two years.
- Match thickness to traffic, not price. The cheapest 6mm board might save you $500 upfront, but if you install it in a high traffic hallway or kitchen, you’ll likely replace it in 3 to 5 years. That’s $500 wasted plus the cost of removal and disposal. For any room where you walk daily, 8mm is the minimum. For main living areas, go 12mm if your budget allows.
- Check the AC rating before you buy. Thickness and AC rating are different numbers, and both matter. A 12mm board with AC2 is a marketing gimmick. Look for AC3 at minimum for any room with kids or pets. AC4 for kitchens, entryways, and rooms with heavy furniture that gets moved. AC5 is overkill for residential use.
- Plan for transitions. If you’re installing laminate in one room and keeping carpet or tile in the next, measure the height difference before you buy. A thick 12mm board with a thick pad may sit a quarter inch higher than an adjacent floor. You’ll need a transition strip that slopes smoothly. Your flooring installer or a local lumberyard can help you pick the right profile. Burns Carpentry includes transition planning in every flooring installation quote so there are no surprises.
Frequently Asked Questions
Is 12mm laminate worth the extra cost over 8mm?
Yes, if you have a high traffic area, an uneven subfloor, or a concrete slab. The extra thickness provides better sound dampening, more comfort underfoot, and better stability on imperfect surfaces. For a low traffic bedroom or guest room, 8mm is perfectly fine and will save you money.
Can I install thin 6mm laminate in a basement?
Not recommended for a Cary basement. Basement slabs are often slightly uneven and can have moisture issues. A thin 6mm plank will flex over small dips and may warp if moisture seeps through. Use at least 8mm with a built in vapor barrier, or better yet, 12mm if the slab is uneven.
How do I know if my subfloor is flat enough for laminate?
Lay a 6 foot straightedge (or a long level) on the floor in several spots. If you can slide a dime under it at any point, the floor isn’t flat enough. You’ll need to level those low spots with self leveling compound before installation. Burns Carpentry includes a subfloor assessment in every free estimate for laminate flooring installation.
Does thicker laminate last longer than thinner laminate?
All else being equal, yes. A thicker HDF core resists impact damage and joint separation better. But thickness alone isn’t a guarantee. The quality of the core density and the AC rating matter just as much. A well made 8mm board with AC4 rating will outlast a cheap 12mm board with AC2 rating.
If you’re planning a laminate flooring project in the Cary area and want to get the thickness and product right the first time, give Burns Carpentry a call. We handle the entire process from subfloor assessment to final installation, and we’ll give you an honest recommendation based on your specific room, budget, and lifestyle. Free estimates, no pressure.
