A Job That Started Simple Enough
In March 2023, I landed a job that, on paper, looked perfect. A homeowner in Congleton wanted Karndean vinyl click flooring throughout their open-plan ground floor. The spec was clear: their preferred collection, a mid-range LVT plank, glue-free click system. They'd done their research. They knew the brand. They'd even picked out the color—a grey-washed oak effect from the Van Gogh range.
I'd worked with Karndean products plenty of times before. Distributor network is solid, the LVT is consistent, and their click system, Korlok, is generally straightforward. So I quoted the square footage, added my markup, and factored in a day and a half for installation. Simple.
Or so I thought.
The First Red Flag I Missed
The client mentioned, almost as an afterthought during the final walkthrough, that they wanted the floor to be 'quiet'. They had a toddler and a large dog, and the existing concrete subfloor made the room echo. 'No problem,' I said, thinking about the underlayment that comes integrated with some Karndean click products. 'The vinyl itself has a decent acoustic rating.'
I didn't ask the next question. I should have.
Here's the thing: most buyers focus on the obvious factors—the color, the brand name, the price per square meter. They completely miss the acoustic performance requirements. And the question everyone asks is 'how much per square meter?' The question they should ask is 'what's supported underneath it?'
I assumed the client's 'quiet' meant standard residential comfort. It did not.
The Sound Proofing Panels Problem
Two days into the installation, I realized the issue wasn't the Karndean flooring itself—it was what was underneath. The client's husband was a musician. He played drums. Not occasionally, but daily. And their 'quiet' requirement wasn't about footsteps; it was about containing the thud of a kick drum from the room below.
They wanted sound proofing panels. Not just underlayment—dedicated acoustic panels designed to decouple the floor from the subfloor. The kind of product you'd use in a recording studio or a multi-family dwelling with strict noise bylaws.
The Karndean Korlok system I'd quoted is a floating floor. It works great with standard underlayments. But stacking a thick, soft sound proofing panel underneath a floating click-LVT floor creates a problem: the floor becomes unstable. The planks can flex and break the locking mechanism over time. The clicking system needs a firm, stable base.
Everything I'd read about Karndean installations said standard underlayments are fine. In practice, with these specific sound proofing panels, the conventional wisdom was wrong.
I stopped work. Called the client. Explained the incompatibility. They looked at me like I'd just told them the sky was green.
But you're the expert. You should have told us this before we ordered 50 square meters of flooring.
She was right. (Honestly, she was totally right.)
The Cost of the Mistake
Here's where the numbers get ugly. The order for the Karndean vinyl click flooring was already cut and delivered. The sound proofing panels were on site. We now had two incompatible products and an unhappy client.
Option A: Replace the sound proofing panels with a compatible, thinner underlayment that wouldn't compromise the floor lock. But the client didn't want that—their noise problem wouldn't be solved.
Option B: Switch from the click system to a glue-down Karndean product (which is more compatible with thick acoustic layers). But that meant a new order, a delay, and the glue-down option required a perfectly smooth subfloor—which theirs wasn't.
Option C: Change to a completely different flooring system that could handle the sound proofing panels. But the client wanted Karndean. They'd chosen it for a reason (the specific design, the reputation).
In the end, we compromised. We installed a thinner, high-density acoustic underlayment designed for floating floors (not the thick sound proofing panels they'd bought). It helped with footsteps, but it didn't solve the drum issue. The client was disappointed. I was embarrassed. And I ate the cost of the unused sound proofing panels and the extra labor—about $890 in total. Plus a 1-week delay while we re-planned.
That error cost $890 in redo plus a 1-week delay. Credibility damaged, lesson learned.
What I Learned About Karndean Specifications
The mistake wasn't about the quality of the Karndean product. It was about the specificity of the installation environment. After the third rejection in Q1 2024, I created a pre-check list for every job involving vinyl click flooring. Here's what I now ask every client before I even quote:
- What's below the room? A basement, another living space, or a concrete slab on earth? The acoustic requirements change dramatically.
- Any musical instruments, home theaters, or heavy machinery? Standard 'quiet' is not the same as acoustic isolation.
- What underlayment do you already have on site? (The answer to this question would have caught the problem immediately in Congleton.)
- Glue-down or click? If they want click, I now explain the limitations with thick acoustic layers upfront. If they want glue-down, I budget for subfloor prep.
The vendor who lists all the compatibility issues upfront—even if their total quote looks higher—usually costs less in the end. Period.
Bottom Line for Floor Fitters
If you're specifying Karndean (or any LVT) for a job, especially in a residential setting where people have specific expectations about noise, don't assume the standard solution works. Ask the questions that nobody asks. And if a client mentions sound proofing panels, stop the conversation right there.
I've learned to ask 'what's NOT included?' before 'what's the price?'. The same applies to installation specs: ask 'what's underneath?' before 'what's the brand?'.
The Karndean floor in Congleton is still there. It looks great. The client loves the design. But every time I visit (I did the adjacent hallway later), I see those unused sound proofing panels in the garage and remember the lesson. Transparency with the client about limitations early on builds trust. Hiding them to close the sale costs more in the long run.
