Karndean Flooring: 8 Questions from a Pro Who's Seen It All
Look, I've been a project manager in the commercial flooring space for 8 years, and I've personally handled over 200 rush orders—including a few that came in 36 hours before a deadline. I've ripped out floors that were installed wrong, spent $800 on rush shipping just to save a $12,000 project, and learned the hard way which materials actually hold up. So here's the real talk on Karndean, the questions I get asked most, and what I've learned the expensive way.
Quick note: Pricing in this article is based on data from major US distributors as of January 2025. Markets change fast, so always verify current quotes.
1. How much does Karndean Knight Tile cost per square foot?
Straight answer: For standard Knight Tile, expect to pay $5.50 to $9.00 per square foot for the material alone (based on distributor quotes from Q4 2024; verify current pricing). But here's the thing—the cheapest price I've seen was $4.80/sq ft for a bulk order of a less popular colorway, and the most expensive hit $11.50 for a custom pattern with a short lead time.
What that price includes (or doesn't):
- Material only. Installation runs $2.50–$5.00/sq ft depending on your region and subfloor condition.
- Shipping. Freight costs can add $0.50–$1.00/sq ft for small orders.
- Rush fees. Need it in 2 weeks instead of 4? That's usually a 15–25% premium.
In my experience managing about 45 flooring projects last year, the lowest quote often had the longest lead time or the weakest warranty. The $4.80 option came from a discount distributor—we tested it, and the color consistency across boxes was noticeably worse.
My advice: Get 3 quotes and compare total cost (material + shipping + install + rush fees), not just the per-square-foot number. That $0.50 savings can disappear fast if you need a redo.
2. What about Karndean Art Select Corinthian Marble LM31? Is it worth the premium?
Yes, and I'll tell you why with a real example. In March 2024, a client's high-end event venue needed 1,200 sq ft of a marble-look LVT. The original spec was a standard sheet vinyl at $3.20/sq ft. The client wanted the look but not the maintenance of real marble. We priced the Art Select LM31 at $8.50/sq ft (material only—and yes, that was after a 10% volume discount).
The difference it made: The LM31 has deeper embossing and a more realistic grout line texture than standard LVT. After installation, the client's designer actually said it looked better than the real marble samples they'd been considering. And the durability? 12 months later, zero issues—even with 500+ people walking on it each weekend.
But here's the risk: Art Select is a premium line. If you need it on a 2-week lead time, you're paying a premium on top of a premium. I've seen a $3,000 project turn into $4,200 just because of rush fees on this specific line.
Is it worth it? For a high-traffic commercial space where image matters? Yes. For a residential basement where cost is the #1 concern? Probably not—Knight Tile will give you 85% of the look for 60% of the price.
3. How do I get paint out of clothes after a flooring job?
Real talk: I've ruined more shirts than I want to admit. And at this point, I've tried everything from Goo Gone to gasoline (do not recommend the latter).
What actually works (tested on 12 different paint stains across 3 shirt types):
- For water-based paint (most common on job sites): Rubbing alcohol. Dab it on, let it sit for 2 minutes, then scrub with a toothbrush. I've had 90% success rate on stains that were less than 6 hours old.
- For oil-based paint: Mineral spirits (outside, with gloves). But honestly, if it's been more than an hour, the shirt is a lost cause. I've accepted that.
- For dried paint (24+ hours old): I've had luck with a 50/50 mix of dish soap and white vinegar, applied as a paste, left for 30 minutes, then scrub. It got 70% of the stain out—not perfect, but wearable.
One thing I learned the hard way: Hot water sets paint stains. Always rinse with cold water first. I ruined a $60 work shirt by running it under hot water immediately after a spill. Won't make that mistake again.
4. How do I protect baseboard trim during a Karndean installation?
This is one of those questions that sounds simple but has a big impact. I've seen projects where the baseboard trim got chewed up because the installers didn't prep properly.
What we do on our projects (based on 200+ installations):
- Option 1: Remove the baseboard. Best practice, but adds 30–60 minutes per room. We do this for any project over $5,000.
- Option 2: Use quarter round. Cheaper and faster, but it changes the look. Works great for budget projects.
- Option 3: Tape and pray. Use 3M blue painter's tape (the wide one, 3 inches). Cover the baseboard completely. I've tested this vs. expensive specialty tapes—the 3M holds up just as well for a fraction of the cost.
From a project I managed in June 2024: A client insisted on keeping their original 100-year-old baseboard moldings. We spent 2 hours carefully taping each one. It took forever, but we saved the client $2,500 in potential restoration costs. Totally worth it for historic homes.
5. What about valve stem clearance with Karndean flooring?
Here's a question most people don't think about until it's too late. Valve stems (those metal stems under your sink or behind your toilet) can be a major issue if your new flooring raises the height of the floor.
The problem: Most LVT adds about 1/8 to 5/16 inch to the floor height. That small increase can make it impossible to close a valve fully, or worse—you might not notice until you have a leak and can't shut the water off.
What I've learned: In 2023, we did a project where we installed Karndean Korlok (a click-lock LVT that's about 5.5mm thick) on top of existing tile. The height increase was only 3/16 inch. But that tiny change meant the toilet flange didn't sit flush anymore. We had to re-cut the flange (an extra $150 and 2 hours).
My rule of thumb: Before any installation, measure the current floor height vs. the finished height with the new flooring. If the increase is more than 1/4 inch, plan for a valve stem extension kit (about $20–40) or a plumber visit (about $150–300). It's cheaper to plan for it than to fix a leak after the fact.
And yeah, I've ignored this advice once. That $20 valve extension would have saved me a $600 emergency plumbing call on a Saturday. Learn from my mistakes.
6. Should I buy Karndean from a big box store or a specialty distributor?
I'll give you the honest answer after 8 years of managing procurement: it depends on what you value.
Big box stores (like Home Depot, Lowe's):
- Pro: Convenience, easier returns, often better financing options.
- Con: Limited selection (they stock only the top 10–20% of the Karndean line), less expert advice, and you're competing with homeowners for installers.
- Price: Usually 5–15% higher than specialty distributors on identical products.
Specialty distributors:
- Pro: Full selection (all Karndean collections), expert sales reps who know installation specs, better terms for volume orders, and often have in-house installers.
- Con: Minimum order quantities (often 500 sq ft), less forgiving return policies.
- Price: Lower per-square-foot but higher upfront minimums.
From my experience: For a project over 1,000 sq ft, go with a specialty distributor. I've saved clients 10–20% compared to big box store quotes. But if you need just 200 sq ft for a small room, the big box store is probably easier and less hassle.
And if you're doing a rush order? Specialty distributors usually have better stock and faster shipping because they deal in volume.
7. How does Karndean compare to other premium LVT brands?
I'll be careful here because I don't want to bash any specific competitor, but I can share what I've seen on actual job sites.
Karndean vs. others (observations from 50+ projects):
- Design quality: Karndean's Art Select and Van Gogh collections have the most realistic wood and stone visuals I've seen—especially the embossed-in-register texture. I've had clients literally ask if it's real wood.
- Durability: Commercial-grade Karndean consistently holds up well. I've seen 5-year-old installations in high-traffic retail spaces with minimal wear.
- Warranty: Karndean's warranty is industry-standard for premium LVT—nothing special, but nothing to complain about. Always read the fine print on wear layer thickness.
- Price: Karndean is premium. It's not the cheapest LVT, but it's also not the most expensive. Think of it as a Toyota Camry in the LVT world—reliable, well-designed, and holds its value.
But here's my honest criticism: Karndean's installation guide is overly detailed (25+ pages for some products). I've seen installers skip steps because they didn't want to read the manual. That can lead to warranty issues if something goes wrong. So if you're DIYing, read the whole guide. It's boring but worth it.
8. What's the most important thing to get right with a Karndean installation?
If I had to pick one thing, it's subfloor preparation. I cannot tell you how many problems I've traced back to a subfloor that wasn't flat enough.
The spec: Karndean requires the subfloor to be flat to 3/16 inch over 10 feet. That's stricter than many other LVTs. I've tested this—if you skip this step, you'll see lipping at the seams within 6 months. And lipping means the floor looks bad and can catch dirt.
From a project in 2024: We had a 2,000 sq ft office install where the general contractor didn't let us check the subfloor before they installed the LVT. Three months later, there were visible ridges at four seams. The client had to pay $4,500 for a partial redo. I warned them. They didn't listen. Now I include a subfloor check in every contract, and I charge for it if there's a problem.
Bottom line: Spend the extra day prepping the subfloor. It's the most boring part of the job, but it's also the most critical. And if a contractor tells you it's not necessary, find another contractor.
This information was accurate as of January 2025. Market conditions and pricing change frequently, so always verify current rates with a local distributor.
