What Thickness Laminate Should You Choose? A Guide to 7mm to 12mm

Laminate flooring comes in a range of thicknesses, usually from 7mm up to 12mm. It is one of the first choices people get stuck on. It is tempting to assume thicker always means better, but the truth is more useful than that. Thickness affects how solid, quiet and warm a floor feels underfoot and how forgiving it is of an uneven subfloor, but it is not the same thing as durability. This guide explains what the millimetres actually mean, how thickness works alongside the AC rating and underlay and which thickness to choose for each room.

One quick point of confusion worth clearing up first: laminate thickness refers to the whole board, including its high-density fibreboard core. It is a different measurement from the wear-layer thickness quoted for luxury vinyl, so the two numbers are not comparable. At Grosvenor Flooring you can browse laminate by thickness from 7mm up to 12mm, all available to buy online with free UK delivery.

Key Takeaways

• Laminate thickness runs from 7mm to 12mm and measures the whole board, not the wear layer quoted for vinyl.
• Thickness governs feel and subfloor tolerance; the AC rating governs durability, so read both together.
• 8mm is the everyday standard, 7mm saves money in quiet rooms and 12mm is best for hallways and feature spaces.
• Underlay matters as much as board thickness; a 3mm acoustic underlay suits most rooms. Underfloor heating needs a low-tog version.
• Check that a thicker floor still clears internal doors and matches thresholds before you order.

Laminate Thickness Explained

The thickness on the box is the height of the whole plank, measured in millimetres. Most laminate falls between 7mm and 12mm. The common steps are 7mm, 8mm, 9mm, 9.5mm, 10mm and 12mm. The bulk of that measurement is the HDF core, which gives the board its rigidity and stability. A thicker core means a more rigid plank that bridges small dips in the subfloor better, locks together more solidly at the joints and carries sound differently underfoot.

What thickness does not tell you is how hard-wearing the surface is. That job belongs to the wear layer and its AC rating, which we come to next. It is perfectly possible to have a thick board with a modest AC rating, or a thinner board rated for heavy use, which is exactly why you need to read both numbers together.

Thickness vs AC Rating – Which Matters More?

These are the two specifications that decide how a laminate floor performs. They do different jobs. Thickness governs feel: solidity, acoustics, warmth and tolerance of an imperfect subfloor. AC rating governs durability: how well the surface resists abrasion, scuffs and impact. The AC scale runs from AC1 to AC5: AC3 suits quiet domestic rooms, AC4 busy family homes and AC5 the heaviest use.

For wear and longevity, the AC rating matters more than thickness. A busy hallway needs a high AC rating far more than it needs sheer millimetres. For comfort and a quality feel underfoot, thickness matters more. In practice the two tend to rise together, because manufacturers pair their thickest boards with their toughest wear layers, so a premium 12mm floor usually carries an AC4 or AC5 rating as well. The sensible approach is to set your minimum AC rating from the room’s traffic, then choose the thickness for the feel you want.

What Thickness Laminate for Each Room?

The right thickness is a balance of the room’s use, the feel you want and your budget. The table gives a starting point. The thickness links take you straight to each option.

As a rule of thumb, 8mm is the everyday standard that suits most rooms, 7mm saves money in lighter-use spaces and 12mm is the premium choice for busy areas and for anyone who wants the most solid, wood-like feel. The 9mm and 9.5mm boards sit sensibly in between.

Does Thicker Laminate Feel Better?

Up to a point, yes. A thicker board feels more solid and reassuring underfoot, is quieter to walk on and tends to feel a touch warmer than a thin one. It also handles a slightly uneven subfloor more gracefully, because the extra rigidity bridges minor dips rather than flexing into them. This is why a 12mm floor feels closer to real timber than a 7mm one.

There are diminishing returns, though. The jump from 7mm to 8mm or 10mm is very noticeable; the difference between two premium thick boards is far more subtle. And thickness is only half the comfort story. The underlay beneath the boards does just as much for how the finished floor feels and sounds, which brings us to the next point.

The Role of Underlay

Underlay is not an optional extra with laminate; it is part of the system. A quality acoustic underlay cushions footfall, cuts the hollow, clicky sound thin laminate can make and adds a little warmth and comfort. A good underlay under an 8mm board can make it feel more solid than a thick board laid over a poor one, so it is worth getting right.

A few pointers. A standard laminate underlay is usually around 3mm thick, which is the sweet spot for cushioning without letting the boards flex too much – so a 3mm underlay is the common choice. Do not stack two underlays to add thickness, as too much give strains the joints. If you have underfloor heating, choose a low-tog underlay designed to let heat through efficiently rather than a thick, insulating one. And whatever the board thickness, a flat, well-prepared subfloor underneath makes the biggest difference of all to how the floor performs.

Thickness, Doors and Subfloor Height

One practical thing thickness affects is floor height. A thicker board plus its underlay raises the finished floor, which can leave internal doors catching and create a step at thresholds into other rooms. It is worth checking door clearance before you choose, especially if you are moving up from an old, thin floor. If height is tight, a slimmer 7mm or 8mm board helps you match levels and clear doors. In a new build or a room being levelled anyway, thickness is a freer choice. Either way, the subfloor needs to be flat and sound before any laminate goes down, whatever its thickness.

Frequently Asked Questions

What is the best thickness for laminate flooring? For most rooms, 8mm is the best all-round thickness: solid enough to feel good underfoot without pushing up the price. Step up to 12mm for hallways, open-plan spaces and anywhere you want the most solid, wood-like feel. Drop to 7mm to save money in quiet, lighter-use rooms. Pair your chosen thickness with the right AC rating for the traffic.

Is 12mm laminate better than 8mm? It feels more solid and is quieter and more forgiving of an uneven subfloor, so in a busy or open-plan room 12mm is worth the extra. In a quiet bedroom, though, an 8mm board performs perfectly well and costs less. Better depends on the room: 12mm for feel and heavy use, 8mm for a sensible everyday balance.

Does the thickness of laminate affect how long it lasts? Less than you might think. Longevity is set mainly by the AC rating of the wear layer, not the thickness of the board. A thick board with a low AC rating can wear faster in a busy room than a thinner board with a high one. Thickness affects how the floor feels; the AC rating affects how well it survives traffic, so match the rating to the room first.

What underlay do I need for laminate flooring? A quality acoustic underlay, usually around 3mm thick, suits most laminate floors. It cushions footfall, reduces sound and adds comfort. If you have underfloor heating, choose a low-tog underlay designed to let heat through rather than a thick insulating one. Do not stack underlays to gain thickness, as too much give strains the click joints.

Does thicker laminate need thicker underlay? No. A standard 3mm underlay is right across most board thicknesses; the board does not need a thicker underlay just because it is thicker itself. What matters more is choosing the correct type for your subfloor and for underfloor heating and making sure the subfloor beneath is flat and sound before you lay anything.

Further Reading

Once you have settled on a thickness, our best laminate buyer’s guide helps with brand and format. Our laminate cost guide covers value at each tier.

To compare thicker options directly, browse 12mm laminate or the more affordable 7mm laminate. Or browse the full laminate flooring range online.