If you've ever spent hours meticulously laying down floor tiles only to realize the next morning that some edges are higher than others, you definitely need a nivelleersysteem. There is nothing quite as frustrating as walking across your brand-new kitchen floor and feeling that sharp "lip" of a tile catching your sock. It's one of those things that, once you see it, you can't unsee it. Every time the sun hits the floor at a certain angle, those tiny shadows at the joints will scream at you.
Fortunately, the days of relying solely on a steady hand and a rubber mallet are pretty much over. Whether you're a seasoned professional or someone who just decided to tackle a bathroom renovation over the weekend, using a leveling system—or a nivelleersysteem as we often call it—is probably the best decision you can make for the final look of your project.
What's the big deal with lippage?
In the tiling world, "lippage" is the word we use for that annoying vertical displacement between adjacent tiles. Basically, it's when one tile is higher than the one next to it. It happens for a bunch of reasons. Sometimes the subfloor isn't perfectly flat (let's be real, it almost never is), or maybe the adhesive wasn't spread evenly. Other times, the tiles themselves have a slight bow to them, which is incredibly common with those long, wood-look porcelain planks that everyone loves right now.
When you use a nivelleersysteem, you're essentially forcing those tiles to sit at the exact same height while the adhesive sets. It takes the guesswork out of the equation. Instead of constantly checking with a spirit level and poking at the corners, the system does the heavy lifting for you.
How the system actually works
If you haven't seen one in action, a nivelleersysteem usually consists of three main parts: the clips, the wedges, and a special pair of pliers.
The clips are the "disposable" part. They have a flat base that you slide under the edge of the tile into the wet adhesive. The top of the clip sticks up through the grout line. Once you place the neighboring tile, you've got two tiles sitting on the base of that clip.
Then comes the wedge. You slide the wedge through the hole in the clip and use the pliers to squeeze it tight. This pressure pulls the tiles upward against the top of the wedge and pushes them down into the mortar until they are perfectly flush. It's a satisfying click, honestly. Once the glue has dried, you just kick the clips off (usually with a rubber mallet or your boot) in the direction of the joint, and they snap off clean at the base, leaving the bottom part buried under the tile.
It's not just for the pros
I've heard some DIYers say they don't need a nivelleersysteem because they're "taking their time" and "being careful." While I admire the confidence, even the most careful person can't fight gravity or the way mortar shrinks as it cures. As the moisture leaves the thin-set mortar, it can actually pull the tile down slightly. If one tile has a bit more glue under it than the next, they'll shrink at different rates, and by morning, you've got lippage.
Using a nivelleersysteem acts like an insurance policy. It locks the tiles in place so they can't move anywhere while the chemical reaction in the glue is happening. If you're spending hundreds or thousands of dollars on beautiful large-format tiles, it feels a bit silly to skip a tool that costs a fraction of that and guarantees a flat finish.
Why large tiles changed the game
Back in the day, when 30x30 cm tiles were the standard, leveling wasn't such a headache. But look at any tile shop today—everyone wants 60x60, 90x90, or those massive 120 cm planks. These larger tiles are much harder to lay flat. Because they cover more surface area, any slight bump in the floor is magnified.
Also, as I mentioned earlier, big tiles often have a slight "crown" or curve from the manufacturing process. If you try to offset these tiles (like a brick pattern), the highest point of one tile ends up next to the lowest point of the next. Without a nivelleersysteem, getting those joints smooth is almost impossible. The system helps "pull" that slight curve out of the tile to match its neighbor.
A few tips for getting it right
While the system is pretty straightforward, there are a couple of things to keep in mind so you don't run into trouble.
First off, watch your glue. You want to make sure you're using the right notched trowel. If you have too much adhesive squeezing up into the joints, it's going to get in the way of the clips and make a mess. You'll end up spending hours picking dried mortar out of the gaps before you can grout. I usually find that "back-buttering" the tile (putting a thin layer of glue on the back of the tile itself) helps get a better bond without having to use a massive amount of glue on the floor.
Second, don't wait too long to remove them. You need the adhesive to be fully cured—usually 24 hours—but you don't want to leave the clips in for a week. Also, always snap them off by hitting them from the side, not from the front or back. If you hit them the wrong way, they might not break clean, and you'll have a little piece of plastic sticking up that you'll have to carefully dremel out later. Trust me, you don't want to be doing that on 50 different spots.
Lastly, clean as you go. Since the clips sit in the grout lines, you want to make sure those lines stay relatively clear of excess mortar while the glue is still wet. A quick wipe with a damp sponge or a spacer tool will save you a world of hurt later.
Is it worth the extra cost?
Let's talk money for a second. Yes, buying a nivelleersysteem adds a bit to your budget. You have to buy the pliers (once), the wedges (which are reusable), and the clips (which are one-time use). However, when you compare that cost to the price of a ruined floor, it's a no-brainer.
If you mess up a floor without a leveling system and decide you can't live with the unevenness, your only real option is to rip the tiles up and start over. That means lost tiles, lost adhesive, and a lot of lost time. When you look at it that way, a bag of clips is incredibly cheap. Plus, you'll work much faster. Once you get into a rhythm with the wedges, you'll find you aren't second-guessing every single tile you lay.
Final thoughts on the finish
At the end of the day, the goal of any tiling project is a professional-looking finish that lasts for decades. Whether you're doing a sleek modern kitchen or a rustic bathroom, the flatness of the floor is what defines the quality of the work.
If you're on the fence, just try it. The first time you kick those clips away and see a perfectly smooth surface where the grout lines are uniform and the tiles are level, you'll never want to go back to the old way. A nivelleersysteem doesn't just make the floor look better; it makes the whole process less stressful. And when it comes to home renovation, anything that reduces stress is a win in my book.
So, before you spread that first bit of mortar, make sure you've got your clips and wedges ready. Your feet (and your eyes) will thank you later when you're enjoying that perfectly flat floor.