How to Prevent Tile Lippage in Large Format Tiles

• ARDEX ENDURA
• 05 Jun 2026
• 06 Min

Large-format tiles are a favourite for modern homes as they create a sleek look with fewer grout lines. However, they are prone to floor tile lippage, causing their edges to sit unevenly. Even a minor installation error can ruin the final finish.

At Ardex Endura, we offer solutions that help ensure a flat, even surface and a flawless finish every time.

What is Tile Lippage?

Lippage is the height difference between the edges of two adjacent tiles. Essentially, one tile edge sits higher than the one next to it. This vertical displacement significantly affects the aesthetics of your floor. It creates shadows that make the surface look poorly installed.

Beyond appearance, tile lipping creates serious tripping hazards in your home. It can cause chairs to wobble or feet to stub. It reduces the overall quality perception of your entire renovation project.

Why Large Format Tiles Are More Prone to Lippage

• They are highly sensitive to slight installation errors. Moreover, their large size magnifies even small mistakes across the floor.
• Tile warpage is also a common issue, as most large tiles have a slight natural bow from the kiln.
• Substrate irregularities become more visible as surface area increases. A small bump in the floor creates a massive tilt in the tile.
• Improper adhesive application also plays a huge role in these failures. Without the right coverage, heavy tiles can slump or shift.

Common Causes of Tile Lippage

Uneven Substrate/Surface

An uneven base is the most common cause of poor tile alignment. If the floor is not smooth, the tile cannot sit flat.

Incorrect Adhesive Selection

A standard adhesive often lacks the strength to hold heavy tiles, leading to them sinking or slipping and causing floor tile lippage.

Poor Installation Technique

Rushing the job often leads to mistakes in tile installation. Without careful placement, the edges will not align across a large area.

Lack of Tile Levelling System

Installing large slabs by visual estimation alone is extremely difficult. Without mechanical levelling systems, achieving a flush surface is nearly impossible.

Improper Adhesive Coverage

Voids under the tile prevent it from staying flat. Air pockets allow tiles to settle unevenly into the adhesive bed.

Tile Warping

Many large tiles are not perfectly flat from the factory. Their edges are difficult to align without specialised techniques.

How to Prevent Tile Lippage (Step-by-Step Guide)

Step 1: Ensure a Level Substrate

A flat, smooth surface prevents tile lipping. You may use Ardex Endura's self-levelling compounds for filling uneven floor areas.

Step 2: Choose the Right Tile Adhesive

Our high-performance deformable adhesives (S1 or S2 class) are specifically designed for large-format tiles. They offer strong bonding, deformation, and high stability, with no shrinkage during curing.

Step 3: Use Proper Trowel Technique

Choosing the correct notch size helps you apply the right amount of adhesive for full coverage. A directional trowelling method allows air to escape from beneath the tile.

Step 4: Back Buttering Tiles

Applying a thin layer of adhesive to the back of the tile improves bonding and helps eliminate hollow voids beneath it.

Step 5: Use Tile Levelling Systems

Clips and wedges lock the tiles at the same height during installation. These tools ensure perfect alignment when the adhesive sets.

Step 6: Maintain Proper Joint Spacing

Wider joints allow for minor adjustments if the tiles have slight size variations. Use tile spacers to keep grout lines straight and even.

Step 7: Check Alignment Regularly

Use a spirit level throughout the installation process, as constant checking helps fix minor errors before the adhesive hardens.

Importance of Surface Preparation

The base plays an important role in the final finish of your floor. If your substrate is uneven, even the most expensive tiles will look poorly installed. Skipping preparation leads to tile lippage and costly repairs later.

We offer surface repair solutions to fix cracks and structural issues before you begin. Self-levelling compounds are the best way to create a smooth, predictable base for installation.

Recommended Ardex Endura Solutions

For Surface Levelling

We offer advanced self-levelling compounds to prepare your floors that give a smooth, even base for your tiles, regardless of their size. Using them is easy, as they dry quickly. They also significantly reduce the risk of tile lippage from the start.

For Large Format Tile Installation

Our high-performance  flexible tile adhesives ( S1 or S2 class) can easily handle the weight of large slabs. These adhesives provide strong bonding and better coverage. They also reduce tile movement during installation, ensuring a stable and long-lasting surface.

For Tile Joint Filling

Ardex Endura's high-quality grouts deliver a professional look. Their benefits include a uniform finish and excellent crack resistance for long-term durability. Our grouts come in a variety of colours to complement your design.

Installation Accessories

Using our tile levelling systems during installation helps ensure the alignment of large-format materials. They help achieve the flawless, professional-grade finish we stand for.

Common Mistakes to Avoid

• Skipping surface levelling is a recipe for poor installation. You cannot fix a bumpy floor with just extra adhesive.
• Using basic cement instead of proper tile adhesive is another major error, as cement does not have the bond strength for large formats.
• Not using levelling systems often results in visible "steps" between tiles.
• Poor adhesive coverage leaves edges unsupported, leading to eventual cracking.
• Rushing the installation prevents you from properly checking for alignment errors.

How to Fix Tile Lippage (If Already Present)

Minor Lippage

For small height differences, grinding or polishing is sufficient as this can smoothe the sharp edges of the stone or tile.

Severe Lippage

If tile lipping is extreme, the only solution is to remove the tile. You must reinstall the affected area to ensure a safe surface.

Best Practices for Large Format Tile Installation

• Always plan your layout properly to avoid awkward placements at the edges and floor tile lippage.
• We highly recommend hiring experienced applicators who understand the challenges of large-format tiles. They have the tools and skills for precision work.
• Always follow manufacturer guidelines for mixing and application to prevent errors.
• Using high-quality materials from the same brand ensures total compatibility.

Conclusion

Large-format tiles require extreme precision while installing to look their best. While tile lippage is a common challenge, it is entirely preventable. With proper preparation, the right materials and correct techniques, you can effortlessly achieve a flawless floor.

At Ardex Endura, we help you achieve perfectly level, excellent tile installations in every dream project.