How to Choose the Right Laminate Flooring Thickness (8mm, 10mm or 12mm?)

Thickness is the single most confusing spec on a laminate flooring box — and the spec retailers most often try to upsell you on. 8mm, 10mm and 12mm are the three thicknesses that dominate the UK market, and the right one for your home depends on the room, the subfloor and your budget — not on a salesperson's recommendation.

This guide breaks down each thickness, what it actually changes, and where you can save money without regretting it later.

Quick answer

  • 8mm: Budget bedrooms, low-traffic rooms, rental refresh.
  • 10mm: Everyday living rooms, dining rooms, hallways. The sensible default for most UK homes.
  • 12mm: Premium look and feel, busy households, where you want the closest thing to real wood underfoot — and where you want a deeper V-groove like our 12V Premium range.

Now the detail.

What "thickness" actually means

A laminate board is made of four layers fused under heat and pressure:

  1. Backing layer — moisture barrier (about 1mm).
  2. HDF core — high-density fibreboard, the structural layer.
  3. Decor layer — the printed image of the wood grain.
  4. Wear layer — a clear melamine surface measured in microns (not mm) by an AC rating.

When a box says "12mm", it's referring to the total thickness — overwhelmingly that's HDF core. Thicker board = thicker HDF core = stiffer floor. AC rating is a separate measure of surface durability, and you should always check it alongside thickness.

8mm laminate

Best for: spare bedrooms, home offices that won't see a rolling chair every day, rental properties, holiday lets on a budget.

Pros: Cheapest per m². Lighter to handle when fitting. Fits under most existing internal doors without trimming.

Cons: Hollower underfoot — you can usually feel the difference walking from carpet onto an 8mm floor. More sensitive to subfloor imperfections (lumps and bumps telegraph through). Click joints are smaller and can wear faster in high-use rooms.

Look for: AC4 rating minimum even on a budget 8mm. AC3 8mm is fine for a guest bedroom but not a kitchen.

10mm laminate

Best for: living rooms, dining rooms, family hallways, master bedrooms — the default for a typical 3-bed UK home that wants quality without overpaying.

Pros: Noticeably more solid underfoot than 8mm. Better integrated underlay options. Most ranges in this thickness include genuine 4-sided V-grooves so each board reads as an individual plank, not a sheet.

Cons: Door clearances need checking — you may need to trim 4–6mm from internal doors after fitting.

Look for: AC4 rating, V-groove if you want the "real wood" look, water-resistant top coat if it's going in a hallway near an external door.

12mm laminate

Best for: open-plan living, kitchen-diners, busy family homes, rooms where you want the closest possible feel to engineered hardwood, anywhere herringbone is being laid.

Pros: The deepest, most pronounced V-grooves. The most solid, "thuddy" sound underfoot. Best click systems — Uniclic, 2G/5G locking — that hold up to decades of expansion and contraction. Best chance of being rated for underfloor heating. Hides minor subfloor flaws.

Cons: Most expensive per m². Requires door undercutting in most properties. Heaviest to carry up flights of stairs during fit.

Look for: AC5 if you have dogs or a big family, V4 (four-sided V-groove), explicit UFH compatibility on the technical sheet.

AC rating: the spec that matters more than thickness

The Abrasion Class (AC) rating measures how the surface resists wear, stains and impact. It's set by EN 13329 and runs from AC1 to AC6.

  • AC3 — Moderate domestic. Bedrooms only.
  • AC4 — General domestic + light commercial. The realistic UK minimum for a living area.
  • AC5 — Heavy domestic + general commercial. Best for kitchens, hallways, busy households.
  • AC6 — Heavy commercial. Overkill for a home but indicates a confident manufacturer.

A 12mm AC3 floor will wear worse than an 8mm AC5 floor, even though it sounds more impressive. Always check AC rating alongside thickness.

Sound: thickness vs underlay

Thickness has a small impact on impact-sound. Underlay has a big one.

If you're fitting laminate above a bedroom, on a flat above neighbours, or in a room where you don't want every footstep to echo, spend the saving from a thinner board on a better underlay. Look for one with a tested Δ Lw rating of 19 dB or higher and integrated DPM (damp-proof membrane) if you're going over concrete.

Underfloor heating

All three thicknesses can be UFH-compatible, but you must check the technical sheet for the specific product. Look for:

  • A maximum surface temperature of 27°C (UK standard for floor surfaces).
  • A thermal resistance (R-value) below 0.15 m²K/W including the underlay. The thinner the floor, the lower the resistance, the more efficiently UFH transfers heat.
  • A manufacturer warranty that explicitly covers UFH.

For UFH, 8mm or 10mm with a low-tog underlay often outperforms 12mm because heat reaches the surface faster.

Door clearances — the mistake first-timers make

Add underlay (typically 2–3mm) to the board thickness to get your real floor build-up:

  • 8mm board + 3mm underlay = 11mm
  • 10mm board + 3mm underlay = 13mm
  • 12mm board + 3mm underlay = 15mm

Then check the gap under every door, the height of toe-kicks under built-in furniture, and whether any radiators sit so low they'd be touched by the new floor.

If you can't undercut a door (e.g. a heavy fire door in a flat), thinner laminate may be the only viable option.

Real-world price difference

In 2026 UK pricing, the gap between 8mm and 12mm laminate in the same colour is typically:

  • 8mm AC4: from £10.99/m²
  • 10mm AC4 V-groove: from £14.99/m²
  • 12mm AC5 V-groove: from £19.99/m²

Spread that across an average UK living room (16 m²) and the difference between 8mm and 12mm is around £140 — the cost of one takeaway delivery a month for half a year, for a floor you'll walk on for 15+ years. Check the current Accent laminate range and the spring sale prices.

Subfloor matters too

If your existing subfloor is a freshly screeded concrete slab, an 8mm board will perform almost as well as a 12mm one because it has nothing to flex over.

If your subfloor is creaky chipboard or older floorboards with visible lippage, thicker boards bridge imperfections better. In that scenario, 12mm is a genuine functional upgrade, not a vanity one.

If you don't know what's under your existing floor, lift one corner before you order. It changes the recommendation.

Decision tree

  1. Will it go in a high-traffic room (living, kitchen, hallway)? → minimum 10mm AC4.
  2. Do you have pets, kids, or a busy household? → 12mm AC5.
  3. Is it a bedroom or low-use room and budget is tight? → 8mm AC4 is fine.
  4. Are you fitting herringbone? → choose 12mm — the pattern reads properly only in deeper boards.
  5. Is the subfloor uneven? → thicker is forgiving.
  6. Underfloor heating? → 8mm or 10mm with the right underlay.

FAQs

Is 12mm laminate worth the extra money? Yes — in living, dining and high-traffic rooms. No — in a guest bedroom you barely use.

Will 8mm laminate damage easily? Not if you pair it with an AC4 rating and a decent underlay. AC rating governs surface damage, not thickness.

Does thicker laminate sound less hollow? A little. Underlay matters more.

Can I mix thicknesses between rooms? Yes, with a threshold strip between rooms. Aim to keep the finished height identical so you don't trip over the join.

How many samples can I order? Up to four free. Order samples →

What to do next

  1. Walk through your home and write down each room's traffic level and subfloor type.
  2. Use the decision tree above to pick a thickness per room.
  3. Order one sample per shortlisted thickness and feel the difference in your hand.
  4. Confirm UFH compatibility on the technical sheet before ordering for a heated room.

Order free thickness samples → /collections/samples