Laminate plank thickness affects how the floor feels, sounds, and performs.
Two laminates with the same AC rating can feel very different underfoot if one is 7mm and the other is 12mm. Knowing which thickness suits which application helps you make a more informed choice—and avoid paying for thickness you do not need or skipping thickness you do.
Table of Contents
- The Short Answer
- What Thickness Actually Changes
- The Four Thicknesses, Side by Side
- How Thickness and AC Rating Interact
- Matching Thickness to the Room
- Sound, and Why Thin Laminate Reads Hollow
- What Underlayment Does That Thickness Cannot
- Where the Money Is Best Spent
- Related Guides
- Want Help Choosing the Right Laminate Thickness?
- Frequently Asked Questions
The Short Answer
8 mm at AC3 or AC4 is the right specification for most of a house, and 10 mm is worth the step up in a kitchen, a condo, or anywhere the floor sits above a room somebody sleeps in. 7 mm belongs in quiet bedrooms on a tight budget. 12 mm is a genuine premium product, and it earns its price in specific situations only.
The important caveat comes first, because it is the thing most often got wrong on a showroom floor: thickness is not durability. Two planks of identical thickness can be two AC classes apart, and it is the AC class that decides how long the surface lasts. Thickness decides how the floor feels and sounds. Both matter, but they are not the same purchase, and if the budget forces a choice between them, buy the rating. The laminate pillar sets both specifications in context.
What Thickness Actually Changes
Three things change as a plank gets thicker, and none of them is wear resistance. The first is rigidity: a thicker plank flexes less underfoot, so the floor reads as solid instead of laid on. The second is sound — more material between your foot and the subfloor means less noise transmitted through it, both into the room and into the room below. The third is tolerance for an imperfect substrate: a thicker plank bridges minor unevenness slightly better than a thin one, though this is a marginal benefit and not a substitute for levelling a floor properly.
What thickness does not change is abrasion resistance, which lives entirely in the wear layer at the top. A 12 mm plank with a low AC rating will show traffic before an 8 mm plank with a high one, and it will feel lovely while doing it.
The Four Thicknesses, Side by Side
| Thickness | Feel underfoot | Sound | Usual AC range | Where it belongs |
|---|---|---|---|---|
| 7 mm | Least solid, some flex | Most audible; can read hollow | AC2–AC3 | Bedrooms and formal rooms on a budget |
| 8 mm | Meaningfully more solid | Acceptable with good underlay | AC3–AC4 | Living, dining, hallways, bedrooms — most of the house |
| 10 mm | Notably solid | Noticeably muted | AC4–AC5 | Kitchens, busy main floors, condos |
| 12 mm | Closest to engineered hardwood | Quietest; most dimensionally stable | AC5 | Premium rooms, strict condo sound rules, stairs |
Why 8 mm Is the Default
8 mm is the most common residential laminate thickness in Ontario and it deserves to be. The jump from 7 mm to 8 mm is the largest single improvement in feel anywhere on the scale — larger, in practice, than the jump from 10 mm to 12 mm — and it happens at the point where the cost premium is smallest. It is available across the full AC2 to AC5 range, so it does not constrain the rating decision, and AC3 to AC4 at 8 mm covers living rooms, dining rooms, hallways and bedrooms without compromise. For a household putting one product through most of the house, this is the specification to start from and deviate from deliberately.
Where 10 mm and 12 mm Earn Their Premium
10 mm is the point where laminate stops sounding like laminate. It also tends to arrive with the features that make a floor convincing — thicker wear layers, embossed-in-register texture that aligns the surface grain with the printed grain, AC4 or AC5 ratings as standard. In a kitchen, where the floor is underfoot for hours and the sound bounces off hard surfaces, it is the thickness we recommend most often.
12 mm is the thickest residential laminate in common use and feels comparable to engineered hardwood underfoot. It carries the best dimensional stability and the best sound dampening, almost always comes AC5-rated, and frequently pairs with a waterproof core. It is a real product, not a badge — but it is a premium price for a difference most people notice in the first week and stop noticing after that. The exception is a condo with a written sound requirement, where the specification is not about preference.
How Thickness and AC Rating Interact
The two specifications are independent in principle and correlated in practice, because manufacturers reserve their premium features for their thicker products. Most 7 mm laminate is AC2 or AC3; most 8 mm is AC3 or AC4; most 10 mm is AC4 or AC5; most 12 mm is AC5 or higher. That correlation is a marketing decision with no physics behind it, and it has one practical consequence: if you want a high AC rating at a modest thickness, it exists, but you will have to ask for it, because it will not be on the display.
Matching Thickness to the Room
- Bedrooms and formal living rooms — 7 mm or 8 mm.
- Living and dining rooms — 8 mm minimum.
- Kitchens — 10 mm minimum, where solid feel and sound both matter.
- Hallways and mudrooms — 8 mm minimum, 10 mm preferred.
- Condos — 10 mm or 12 mm with an acoustic underlay, and check the board’s rules first.
- Stairs — 10 mm or 12 mm, where the feel underfoot is most exposed.
Thickness is the one laminate specification you cannot judge from a photograph or a sample chip. Book an in-store appointment and walk on a 7 mm and a 10 mm in the same visual — the difference is obvious in about four steps.
Sound, and Why Thin Laminate Reads Hollow
The complaint we hear about laminate more than any other is the sound. 7 mm and 8 mm planks can produce a hollow, slightly plastic note underfoot, particularly over a hard substrate and particularly with a cheap underlay. It is not a defect and it does not affect performance, but it is the thing that makes a floor read as laminate to a visitor who could not otherwise tell.
10 mm and 12 mm produce a more solid, muted note much closer to real hardwood. Where this matters most is predictable: condo units with downstairs neighbours, second-storey bedrooms over a living room, and households with young children asleep at eight o’clock. In those cases thickness and acoustic underlay work together and neither one alone gets you there.
What Underlayment Does That Thickness Cannot
Good underlayment improves the feel and the sound of every thickness, and it is cheaper per square foot than stepping up a tier. Even 12 mm benefits from acoustic underlay in a condo or a second-storey room. Some thicker products arrive with underlay already attached, which is convenient and also means you cannot upgrade it later.
The one hard rule is to confirm that the underlayment matches what the manufacturer specifies, because substituting it is one of the most common ways a warranty quietly stops applying. Laminate Underlayment covers foam, cork, rubber and felt and which one belongs under which floor.
Where the Money Is Best Spent
Our honest position is that thickness is the specification homeowners over-buy most often. Within one brand and one AC rating, moving from 7 mm to 12 mm can shift the product price by 30 to 80 percent — a bigger swing than moving up two AC classes, and it buys feel rather than life. If the budget is fixed, an 8 mm AC4 will outlast a 10 mm AC3 in a busy room, and it will cost less.
The exceptions are real and there are three of them: a condo with sound rules, a kitchen you stand in every day, and stairs, where thin laminate is most obvious underfoot. Everywhere else, specify 8 mm at the right rating, put the difference into a better underlay, and spend nothing on millimetres you will not feel. The cost guide shows how the tiers stack up once installation is included.
Related Guides
A few other guides connected to this topic:
- Laminate Flooring Guide for Ontario Homes (AC Ratings, Cores, Finishes & Where It Works) — The complete laminate flooring pillar.
- Water-Resistant vs Waterproof Laminate: What Is the Real Difference? — Direct comparison with related materials.
- Laminate vs Vinyl Plank vs Engineered Hardwood: Which Should You Choose? — Direct comparison with related materials.
- Vinyl vs Laminate Flooring: What’s the Difference and Which Should You Choose? — Direct comparison with related materials.
- Vinyl & Laminate Floor Cleaning Guide: How to Clean Floors Without Causing Damage — Closely related topic in this category.
- Vinyl vs Laminate vs Engineered Hardwood: Cost, Durability & Where Each Works Best — Direct comparison with related materials.
- Flooring Installation Services — Our sell-and-install service — measuring, an itemized quote, and certified installation handled as part of your purchase.
- Why Work With Alexanian — A century of flooring and rug expertise, sell-and-install accountability, and full-service care.
Want Help Choosing the Right Laminate Thickness?
The best way to choose what’s right for your home is to see the options side by side. Book an in-store appointment at one of our 17 Ontario showrooms and one of our consultants will walk you through what fits your space, your needs, and your budget – or request an in-home visit if that’s easier.
Frequently Asked Questions
Is 12mm laminate better than 8mm?
12 mm feels more solid, dampens sound better and is more dimensionally stable, and in a condo with sound rules or a premium room that difference is worth paying for. For most family homes it is not necessary: 8 mm at AC3 to AC4 is the standard specification and performs well in living rooms, dining rooms, hallways and bedrooms.
What thickness laminate is best for kitchens?
10 mm minimum. The combination of solid feel, sound dampening and the AC4 or AC5 rating that usually comes with that thickness suits how hard a kitchen floor is used.
Does thicker laminate last longer?
Not directly. AC rating drives wear-related lifespan. Thickness affects feel, sound and dimensional stability, not abrasion resistance — an 8 mm AC4 will outlast a 10 mm AC3 in the same room.
Does thicker laminate sound less hollow?
Yes. 7 mm and 8 mm can sound hollow and slightly plastic underfoot, particularly with a cheap underlay. 10 mm and 12 mm over an acoustic underlay produce a note much closer to real hardwood. For sound-sensitive rooms it is the combination that matters, not the thickness alone.
Is 7mm laminate too thin?
7 mm is acceptable for low-traffic, budget-conscious rooms such as bedrooms. For anywhere else, 8 mm or thicker produces better results for a small additional cost.
