Tile Batch, Shade and Grade Explained: Avoid Mismatched Floors

You pick a tile at the shop, the boxes arrive, and half the floor looks slightly different from the other half. This is one of the most common tile complaints, and it nearly always comes down to batch, shade or grade. Understanding these three terms before you buy can save you a lot of frustration.

Why tiles vary at all

Tiles are fired in kilns at very high temperatures. Small changes in raw materials, glaze, printing and kiln temperature from one production run to the next can shift the colour slightly, or change the final size by a fraction of a millimetre. Manufacturers group tiles made together so buyers can get matching pieces. That is where the codes on the box come in.

What the codes on the box mean

Most tile boxes carry some combination of these:

Not every manufacturer prints all of these, and the format varies. Ask at the shop if you are unsure what a code means.

Shade variation

Shade is the colour tone. Two boxes of the same design with different shade codes can be slightly warmer, cooler, lighter or darker. On a large floor, this shows up as patches.

Some tiles also have intentional variation, especially stone, rustic and wooden designs. Manufacturers sometimes rate this from low variation (very uniform) to high variation (each piece quite different). A high variation design is meant to look natural, so do not confuse it with a batch mismatch. Ask what to expect before you buy.

Calibre or size variation

Even rectified tiles can differ very slightly in size between batches. If you mix tiles from two size groups, the grout lines drift and corners stop lining up. Your tile layer will notice this immediately. Buying all your tiles from one batch avoids the problem.

Grades explained

After firing, tiles are sorted by visible quality. The names differ between manufacturers, but the general idea is:

• Premium or first grade. Very few visible defects. Best for main living areas.
• Standard or commercial grade. May have small flaws like minor pinholes, tiny chips on edges, or slight colour spots.
• Lower grades. More visible defects. Sometimes used where looks matter less, like storerooms, or for cutting into small pieces.

Lower grade tiles are not always a bad choice, but you should know what you are buying. Our guide on how to check tile quality explains how to inspect tiles yourself.

How to avoid mismatched floors

1. Buy the full quantity at once. Calculate carefully with our tile calculator and buy everything, including spares, in one go. Coming back later for a few boxes often means a different batch.
2. Check the codes on every box. Before the tiles go to site, make sure batch, shade and calibre codes match across all boxes.
3. Buy extra. Keep enough spare tiles for cuts and future repairs from the same batch. See how much extra tile to buy.
4. Dry lay a few boxes. Ask your tile layer to open several boxes and lay tiles out loose before fixing. Shade differences are easier to spot this way.
5. Mix boxes while laying. Even within a batch, pulling tiles from different boxes spreads out any tiny variation.
6. Store spares properly. Keep leftover tiles, labelled with the room name, in a dry place.

If you do end up with two batches

Sometimes it is unavoidable, like when you need a few more boxes months later. In that case:

• Use the new batch in a separate room, or behind furniture and in wardrobes.
• Put a threshold, border or doorway between batches so the change looks deliberate.
• If both must go in one room, blend tiles from both batches evenly rather than in blocks.

When you visit the shop

Ask us to confirm the batch and shade of what is available for your design. Our shop visit checklist explains what to bring so we can work out the right quantity in one go. Call or visit the shop to check current stock.