If you spend any time in flooring forums or Reddit threads, you’ll see homeowners constantly debating whether 6mm luxury vinyl plank (LVP) is “too thin” — especially when comparing WPC vs SPC flooring for upstairs rooms.
The truth is more nuanced than most online debates suggest. Thickness matters, but it’s rarely the most important factor in how well a floor performs long term.
Let’s break down what actually matters — and what doesn’t.
Layout mistakes matter just as much as material choice. If you’re planning an install, read this guide on why installers avoid H-pattern layouts and what to do instead.
Subfloor Flatness Matters More Than Thickness
One of the best points made in the discussion was this:
If the floor is properly prepared and flat, even thinner LVP can perform just fine.
That’s absolutely correct.
No amount of thickness will fix:
- Uneven subfloors
- Dips and humps
- Loose or damaged sheathing
- Poor prep work
When a subfloor isn’t flat, you’ll often see:
- Joint separation
- Clicking or hollow sounds
- Locking system failure
- Premature wear
A perfectly flat subfloor allows even a 5–6mm floor to perform well. A bad subfloor can destroy a 12mm product.
If you’re installing any floating floor, subfloor prep should be the first priority.
WPC vs SPC: Comfort and Sound Differences Are Real
Another common discussion point was whether SPC feels colder and louder upstairs compared to WPC. This is also accurate.
WPC (Wood Plastic Composite)
- Slightly softer underfoot
- Warmer feel
- Quieter in upper floors
- More forgiving on minor imperfections
SPC (Stone Plastic Composite)
- Very rigid and dense
- Can feel colder
- Transfers sound more easily
- Excellent for basements, rentals, and heavy traffic
For upstairs living spaces, bedrooms, and areas where comfort matters, WPC often feels better long term.
Is 6mm Vinyl Flooring Too Thin?
A 6–6.5mm LVP product sits in the entry to mid-grade category. It’s not premium — but it isn’t automatically bad either.
A quality 6mm WPC plank can perform well when:
- The subfloor is flat
- The locking system is strong
- The wear layer is adequate (12–20 mil minimum)
- The installation is done correctly
If budget allows, stepping up to an 8–10mm product typically provides:
- Better sound absorption
- Slightly better comfort
- More forgiveness for minor imperfections
That said, thickness alone does not determine durability.
Wear Layer Matters More Than Plank Thickness
One detail many homeowners overlook is the wear layer.
A high-quality 6.5mm plank with a 20 mil wear layer can easily outperform a cheap 10mm product with a thin wear surface.
Always look at:
- Wear layer thickness
- Locking system quality
- Core density
- Manufacturer reputation
Thickness should never be the only buying decision.
Pillow Bevel vs Square Edge: Personal Preference (and Installer Reality)
The thread also sparked debate over pillow bevel edges.
Pillow bevels:
- Show plank definition more clearly
- Can hide small subfloor inconsistencies
- Can chip or compress over time
- Less forgiving during installation
Square or micro bevel edges:
- Cleaner, modern appearance
- Less visible wear over time
- Easier to maintain and repair
Some installers dislike pillow bevels because they’re more sensitive to damage and alignment.
This choice ultimately comes down to style preference and expectations.
Final Verdict: Should You Buy 6mm WPC LVP?
If you love the color, the brand quality is solid, and the subfloor is properly prepared — 6mm WPC can perform perfectly well in many homes.
If you want a more premium feel, quieter performance, and extra comfort, moving into the 8–10mm range is often worth it.
The biggest mistake homeowners make is focusing on thickness instead of installation quality and product construction.
Leave a Reply