How Thick is Laminate Flooring: Pros, Cons, and Buying Guide

Walk down the laminate aisle and you will see thicknesses listed in big bold numbers — 7mm, 8mm, 10mm, 12mm. The marketing implies thicker is always better. It is not. How thick is laminate flooring really matters depends on the subfloor below, the noise above, and how you weight feel-underfoot against budget. This guide walks through every common thickness from 6mm to 14mm, explains the AC durability rating that retailers gloss over, and tells you exactly when each option earns its price.

The Standard Thickness Range

The answer to how thick is laminate flooring depends on the product line. Planks ship in five mainstream thicknesses: 6mm, 7mm, 8mm, 10mm, 12mm, with a smaller premium category at 14mm. The number measures the entire plank including the HDF core, the decorative paper layer, the wear layer on top, and any factory-attached underlayment on the bottom. That last detail trips up shoppers — a 12mm plank with 2mm of pre-attached pad is really 10mm of structural board.

For reference, real hardwood typically runs 3/4 inch (about 19mm), so even the thickest laminate is noticeably thinner. The thickness conversation is really about rigidity, sound deadening, and edge profile quality, not durability — that is the AC rating’s job.

6mm and 7mm: The Budget Tier

Six-millimeter and 7mm laminate sells for $0.69 to $1.49 per square foot at Home Depot and Lumber Liquidators. It is genuinely usable for low-traffic rooms — a guest bedroom that sees a vacuum twice a month, a finished basement office, a rental flip you plan to redo in five years.

The drawbacks are real. Thin planks need a flatter subfloor (1/8 inch over 6 feet) because they telegraph every dip. The click locks are weaker, so seams open up if you slide heavy furniture. Sound transmission is the worst in the category — expect a hollow tap when you walk in socks.

8mm: The Workhorse

Eight-millimeter laminate is the default for most US installations and runs $1.29 to $2.99 per sq ft. It hits the sweet spot for kitchens, hallways, family rooms, and entry-level whole-house jobs. The HDF core is dense enough to handle a 1/4-inch dip in the subfloor without a separate self-leveler step.

Pergo Outlast+, Mohawk RevWood, and Shaw Repel all offer well-built 8mm lines with AC4 ratings. For a 1,500 sq ft house with kids and a dog, 8mm AC4 with a quality 3mm underlayment performs nearly as well as 12mm at 60 percent of the total cost.

10mm and 12mm: The Premium Tier

Ten and 12mm planks command $2.49 to $4.99 per sq ft and target homeowners who want laminate to feel and sound like real wood. The added mass deadens footstep noise by 4 to 6 decibels compared to 8mm, which matters in two-story homes and condos with downstairs neighbors.

Twelve-millimeter is also where the better edge details live — deeper bevels, more realistic embossed-in-register textures, and tighter click systems like Uniclic Multifit or Välinge 5G. If the floor is going into a great room visible from the front door, the visual upgrade is worth the money.

14mm: The Specialty Class

Fourteen-millimeter laminate is rare in the US but common in European premium lines like Quick-Step Eligna and Kronotex Robusto. Pricing starts around $4 per sq ft and climbs past $6. The thickness is mostly about acoustic performance and the ability to handle minor subfloor imperfections that would haunt a thinner board.

Skip this tier unless you are installing over a problem substrate or living below an active second floor. The visual difference between 12mm and 14mm is negligible — your money goes further upgrading the underlayment instead.

The AC Rating Matters More Than Thickness

The Abrasion Class (AC) rating measures durability against wear, impact, and stains on a 1 to 6 scale. It is set independently of thickness, so a 12mm plank can be AC3 and an 8mm plank can be AC5. Match the rating to traffic, not the millimeter count.

• AC1: Light residential — closets, guest rooms only
• AC2: Moderate residential — bedrooms, dining rooms
• AC3: Heavy residential / light commercial — whole-house standard
• AC4: General commercial — kitchens, busy entries, small offices
• AC5: Heavy commercial — retail floors, restaurants
• AC6: Public buildings — airports, schools

How to Pick the Right Thickness

Start with the subfloor. If your plywood or concrete is dead flat (1/8 inch deviation over 10 feet), you can drop to 7mm or 8mm without issue. If the subfloor is uneven and you are not pulling out the self-leveler, jump to 10mm or 12mm to bridge dips.

Next, weigh sound. Single-story homes on slab can run 8mm and never notice. Second floors over finished living space, condos, and townhomes benefit from 12mm with an IIC-rated cork or rubber underlayment. Finally, think about feel — thicker planks feel more solid underfoot, especially with shoes off, and that perception alone justifies the cost in primary bedrooms and great rooms.

What to Avoid When Shopping

Two pitfalls cost shoppers thousands. First, do not pay 12mm prices for a board with attached foam underlayment unless you confirm the structural HDF is at least 10mm. Pull the spec sheet — manufacturers list both numbers if they are honest. Second, ignore “thicker = more waterproof” claims. Thickness has nothing to do with water resistance; that comes from the wax-sealed edges and HDF density. For wet rooms, look at AquaGuard, Pergo WetProtect, or hybrid SPC laminates regardless of thickness.