In our Q1 2024 quality audit, I reviewed a batch of 1,200 square feet of luxury vinyl plank from a well-known national brand. The job was for a high-traffic retail lobby. The architect had specified a 20-mil wear layer—industry standard for commercial. The installer did excellent work. The seams were tight. The pattern match was flawless.
And the floor felt absolutely dead underfoot.
Not spongy. Not unstable. Just… hollow. Like walking on a drum.
Let me tell you what happened, because this is the kind of problem that doesn't show up on a spec sheet, but it absolutely shows up in customer complaints a month later.
The Surface of the Problem
When a project like this goes sideways—or rather, goes flat—the first thing everyone looks at is the wear layer. It's the most visible metric. And most buyers, even experienced ones, are trained to ask: 'How thick is the wear layer?'
That's the wrong question.
The question everyone asks is about the top layer. The question they should ask is: 'What is the total build construction, and how does the core layer handle subfloor variation?'
Here's the thing nobody tells you: you can have a 20-mil wear layer—arguably the thickest, most durable option—and still end up with a floor that feels cheap, because the wear layer is only the surface. The feel of a floor is determined 70% by what's underneath it.
Deep Cause: The Specification Gap
I've seen this pattern a ton of times. The architect or specifier nails the surface layer—wear layer thickness, scratch resistance, stain warranty. But then they either ignore or underspecify the three things that actually determine underfoot quality:
- The core layer density: Is it a rigid SPC (Stone Plastic Composite) core or a flexible WPC (Wood Plastic Composite)? SPC is denser and more rigid. WPC is lighter and more comfortable underfoot but can feel less solid. There's no inherently right answer—but the spec should define which one is acceptable.
- The attached pad or underlayment specification: Many LVT products come with a pre-attached pad. But not all pads are created equal. A 1mm foam pad vs. a 2mm rubberized pad makes a massive difference in sound attenuation and footfall comfort. Specifying 'attached pad' without a thickness or density requirement is asking for inconsistency.
- The subfloor preparation tolerance: Even the best floor will feel uneven if the subfloor has dips or bumps beyond 1/8" in 10 feet. I've rejected jobs where the installer swore the subfloor was 'fine' but our flatness gauge showed deviations of 3/16" or more. The spec should require a leveled subfloor, not just a 'clean' one.
In the case of that retail lobby, the architect had specified a 20-mil LVT with a 1mm generic foam pad over a concrete subfloor. The subfloor was relatively flat—within the 1/8" tolerance. But the combination of a thin, low-density foam pad plus a rigid SPC core created that hollow, drum-like feel. The floor was technically to spec. It was just a bad spec.
The Cost of Getting It Wrong
That quality issue cost us a $22,000 redo—and delayed the store opening by two weeks. The client was not happy. (Note to self: always test footfall feel with a sample on the actual subfloor before signing off.)
Here's what I've seen consistently over the last few years:
- Four years ago, in 2021, I was reviewing specs for 50,000 square feet of residential-grade LVT. Almost every spec just said 'LVT flooring, 12-mil wear layer.' Today, I'm seeing more detailed specs, but the ignorance of the core layer is still alarmingly common.
- In a blind test I ran with our installation team last year: the same LVT product with a premium 2mm pad vs. the standard 1mm pad—80% identified the premium pad as 'significantly more comfortable' without knowing the difference. The cost increase was about $0.35 per square foot. On a 1,000-square-foot project, that's $350 for a measurably better feel.
- Meanwhile, a competitor used a budget LVT with a 20-mil wear layer and a cheap foam pad for a retail space. The floor looked identical to the premium option—and then started to feel hollow and 'tinny' within two weeks of foot traffic. The property manager got tired of tenants complaining about the 'cheap floor' and specifically requested a replacement. (Ugh, that was a pain.)
The Fix Is Easier Than You Think
None of this is meant to scare you away from LVT or laminate. It's meant to say: update your specification framework.
What was best practice in 2020—'just specify the wear layer'—may not apply in 2025. Today, you need to specify:
- Core type: SPC or WPC? With density requirements if SPC.
- Attached pad thickness and material: Minimum 1.5mm, preferably 2mm rubberized or closed-cell foam.
- Subfloor flatness requirement: 1/8" in 10 feet maximum deviation. This should be in the contract, not just a polite suggestion.
- Acoustic performance: IIC (Impact Insulation Class) rating if it's a multi-family or commercial project above ground level. This is a code requirement in many jurisdictions now.
And if you're specifying Mannington—or any brand that offers multiple core and pad options—take advantage of their product line customization. A 20-mil 'Adura Max' with a premium pad will feel completely different from the same wear-layer product with a basic pad. The fundamentals haven't changed, but the execution has transformed.
The floor shouldn't just look finished. It should feel like it's worth the money.
