If you’ve looked into design and layout for stock or custom floor tiles, you may have come across something known as the ‘1/3 rule’.
The 1/3 rule for tile refers to a staggered installation pattern. In this layout, each row of tiles is offset by one-third of the tile’s length. It is a popular pattern with rectangular or plank-style tiles, such as those with a ‘wood-look’ or in large-format designs.
In this mini guide, we will explain how the rule helps to create a more visually appealing pattern, and delve into some installation considerations that you should know about.
Why the 1/3 rule is used
Firstly, there are structural reasons. The 1/3 rule can reduce lippage, which happens when the edges of adjacent tiles are uneven and one tile sits higher than another. Offsetting each row by one-third reduces the alignment of high and low points, producing a smoother surface. It can also improve stability by distributing joints more evenly, spreading the stress of impact across the surface.
Then, there is the look. The 1/3 offset pattern appears natural and flowing, mimicking traditional wood flooring or brickwork. Tighter, more consistent grout joints offered by this layout give a cleaner, symmetrical-looking finish.
How the 1/3 rule works
Applying the 1/3 rule to tiling is easily achievable by professional installers, or even serious DIYers. It starts with measuring the full tile length. This will determine how far to offset the next row.
The total length is then divided by three to find the exact offset distance. For instance, if the tile is 300 mm long, the offset should be 100 mm.
Then, each row is offset. The first row is laid normally, before shifting the next row by one-third of the tile’s length. This pattern is continued throughout the installation for a tile surface that is balanced, attractive and durable.
As we have touched upon here, there are several reasons why the 1/3  rule is a popular tiling strategy. Not only does it look good, but it can also increase the performance of tiled surfaces and produce a smooth finish in many types of spaces.