Ceramic Tile Defect Checklist for Importers

Why a Defect Checklist Matters at the Dock

Importers accept shipments based on a visual walk-through and a signed delivery note. That note often does not reflect the actual state of the cargo. A single bad pallet can ruin an installation job, trigger a refund claim, or damage a supplier relationship.

A defect checklist turns a vague “this looks bad” feeling into a documented, actionable record. It also gives the buyer use when negotiating price adjustments. If the buyer knows the factory standard and the agreed tolerance, the conversation at the loading dock is about facts, not opinions.

This checklist is grouped by the type of flaw. Each item includes a short explanation and a red flag that tells you when a minor issue becomes a deal-breaker.

Surface Flaws to Inspect First

Surface defects are the most visible and the easiest to miss at a distance. They also affect how the tile behaves after installation.

1. Pinholes and Dimples
   Tiny voids in the glaze or body. They can be caused by gas bubbles escaping during firing or by impurities in the raw materials. A small number of pinholes may be acceptable for exterior applications, but they are a red flag for kitchen floors or high-traffic areas where grout lines will highlight the texture.
   Red flag: Pinholes that are large enough to catch a fingernail, or clusters of them in the same area of the tile.

2. Glaze Cracks and Crazing
   Fine cracks in the glaze layer, often invisible until the tile is wet or under load. Crazing can let stains into the glaze and make cleaning difficult over time.
   Red flag: Crazing that follows a diagonal pattern across the tile, or glaze cracks that extend to the edge of the tile.

3. Shivering
   Small chips or flakes of glaze that can break off during handling or installation. This is a structural defect, not a cosmetic one.
   Red flag: Any shivering on the corner or edge. Shivering on the face is less critical but still warrants a photo for the claim file.

4. Color Variation
   Differences in tone between tiles in the same batch. This is common in natural stone look porcelain and is often within tolerance. The goal is to ensure the variation is within the agreed batch range.
   Red flag: Tiles that are clearly a different shade, not just a subtle tonal shift. If the variation is visible at arm’s length, it is likely outside the acceptable range.

Edge and Corner Defects That Affect Installation

Edge and corner flaws affect how tiles fit together and how they perform under stress. These are often overlooked because the focus is on the face of the tile, but they are the first thing an installer notices.

5. Chipped Corners
   Chips on the corner or edge of the tile. Small chips are common in shipping. Large chips can cause the tile to shift during installation and create uneven grout lines.
   Red flag: A chip larger than 3 mm on a corner, or any chip that extends into the face of the tile.

6. Beveled Edges
   Edges that are not flat or uniform. This can cause tiles to not sit level on the subfloor, leading to lippage.
   Red flag: Beveled edges that are visible when the tile is held against a straightedge.

7. Edge Cracks
   Cracks that start at the edge and run into the body of the tile. These are structural defects and can lead to breakage during cutting or under load.
   Red flag: Any crack that runs more than 10 mm into the tile from the edge.

8. Uneven Thickness
   Tiles that are thicker or thinner than the standard. This affects lippage and can cause issues with underfloor heating systems.
   Red flag: A thickness variation greater than 0.5 mm from the nominal thickness.

Size and Dimensional Tolerances

Size defects affect the layout and the final look of the installation. They are the most common reason for rework during an installation.

9. Length and Width Variation
   Tiles that are longer or shorter than the nominal size. This is measured at two points on each tile, usually the top and bottom.
   Red flag: A variation greater than 1 mm on a 60 cm tile.

10. Thickness Variation
    Tiles that are not all the same thickness. This is measured at three points on each tile.
    Red flag: A variation greater than 0.5 mm from the nominal thickness.

11. Flatness
    The tile should be flat. This is checked by placing the tile on a flat surface and looking for gaps.
    Red flag: A gap greater than 0.5 mm when the tile is placed on a flat surface.

12. Squareness
    The tile should be square. This is checked by measuring the two diagonals of the tile. If they are equal, the tile is square.
    Red flag: A difference in diagonals greater than 1 mm.

Color and Batch Consistency

Color consistency is a major issue in large projects. Even within the same batch, there can be variation. This is why it is important to check multiple pallets from the same shipment.

13. Batch Number Mismatch
    Tiles from different batches can have different color tones. This is the most common cause of color mismatch in large installations.
    Red flag: Any tile that is not from the same batch number as the rest of the shipment.

14. Glaze Finish Variation
    Differences in the sheen or texture of the glaze. This can be caused by differences in the glaze application process.
    Red flag: A visible difference in sheen when the tiles are held at the same angle to the light.

15. Batch Mixing
    Tiles from different batches are mixed together in the same pallet. This is a red flag because it makes it impossible to control the color variation in the installation.
    Red flag: Any pallet that contains tiles from more than one batch number.

Documentation and Claim Process

A defect checklist is only useful if it leads to a documented claim. The buyer needs to have a clear process for recording defects and communicating them to the supplier.

16. Photo Documentation
    Every defect must be photographed with a scale reference. This can be a ruler, a coin, or a business card. The photo should show the defect in context, not just a close-up.
    Red flag: A photo that does not show the scale of the defect or the location of the defect on the tile.

17. Defect Log
    A written log that records the type, quantity, and location of each defect. This log should be attached to the delivery note.
    Red flag: A defect log that is not signed by both the buyer and the supplier.

18. Claim Form
    A formal claim form that specifies the type of defect, the quantity affected, and the requested remedy. This form should be submitted within the agreed time frame.
    Red flag: A claim that is submitted after the agreed time frame without a reason.

19. Remedy Agreement
    An agreement on how the supplier will remedy the defect. This can be a replacement, a price reduction, or a credit note.
    Red flag: A remedy that is not in writing or that is not agreed by both parties.

Quick Reference Table for Common Defects

The table below summarizes the most common defects and the typical red flags. Use this as a quick reference when walking the dock.

Defect Type	Typical Cause	Red Flag
Pinholes	Gas bubbles, impurities	Large enough to catch a fingernail
Crazing	Glaze-body mismatch	Diagonal pattern across the tile
Chipped Corners	Handling, shipping	Larger than 3 mm on a corner
Beveled Edges	Manufacturing variation	Visible against a straightedge
Length/Width Variation	Firing, cutting	Greater than 1 mm on a 60 cm tile
Batch Mixing	Pallet loading error	More than one batch number on a pallet

Final Checks Before Signing the Delivery Note

Before you sign the delivery note, make sure you have completed the following:

1. You have inspected at least 10% of the tiles on each pallet.
2. You have photographed every defect type with a scale reference.
3. You have recorded the defect count in the defect log.
4. You have agreed on the remedy with the supplier.
5. You have kept a copy of the delivery note, defect log, and claim form.

If any of these steps are not completed, do not sign the delivery note. A signed note is a legal document that states the goods were received in good condition. If you sign it with defects, you may lose your claim.