# Tile Layout Patterns and How They Change Your Order Common tile patterns, the industry offset and grout joint rules for large tile, centering a layout, and overage by pattern. Guide page: (published 2026-10-05, updated 2026-10-05). This Markdown version has the guide's key points, outline, FAQs and sources; the full article, with its worked examples and diagrams, is on the page. ## Key takeaways - Patterns with more cuts, such as herringbone or a diagonal layout, need more extra tile than a straight grid. - For tiles whose offset side is longer than 15 in, ANSI A108.02 (as quoted by CTEF) limits running-bond offsets to 33% unless the tile maker says otherwise. - In running bond with any side over 15 in, joints should average at least 1/8 in for rectified tile or 3/16 in for calibrated tile, plus any edge warpage. - Center the layout so the cut tiles at opposite walls are equal and as large as possible. - Fireclay Tile recommends at least 15–20% overage, and at least 20% for herringbone; your installer should confirm the final number. ## In this guide 1. [Common tile patterns](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#common-patterns) 2. [Offsets for large tile](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#offsets-for-large-tile) 3. [Grout joints in offset patterns](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#grout-joints) 4. [Centering the layout](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#centering-the-layout) 5. [How much extra tile to order](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#how-much-extra) 6. [Agree on the pattern before tiling](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#agree-on-the-pattern) 7. [Worked example: 12 × 24 tile in a 12 × 10 ft room](https://www.howmanyyardsdoineed.com/guides/tile-layout-patterns/#worked-example) ## Frequently asked questions ### What offset should I use for 12 × 24 tile? ANSI A108.02, as quoted by the Ceramic Tile Education Foundation, limits the offset to 33% when the side being offset is longer than 15 in, unless the tile maker specifies otherwise. On a 24 in tile, 33% is an 8 in step. ### Why do some sources say the offset rule starts at 18 inches? A 2017 CTEF tile tip quoted an earlier version of ANSI A108.02 with an 18 in threshold. CTEF's 2025 article quotes the current wording, which applies above 15 in. Follow the current standard and your tile maker's instructions. ### Can I lay large tile in a 50% brick pattern? Only if the tile manufacturer allows it, or if the specifier and owner approve a mock-up and the resulting lippage. The 33% limit exists because long tiles are slightly warped, and a 50% offset puts a high point next to two low ends. ### How much extra tile do I need for herringbone? Fireclay Tile recommends at least 20% overage for herringbone and similar patterns with more cuts, and at least 15–20% in general, for its tiles. Ask your installer to confirm the number for your tile and room. ### What grout joint width do large tiles need? For running bond with any side longer than 15 in, ANSI A108.02 as quoted by CTEF calls for an average of at least 1/8 in for rectified tile and 3/16 in for calibrated tile, widened by the edge warpage of the tiles. ## Related calculators and guides ### Calculators - [Tile Calculator](https://www.howmanyyardsdoineed.com/tile-calculator/) — Tiles and whole boxes for a floor or wall from the area, tile size, grout joint, waste allowance, and the count or coverage on the box. - [Square Footage Calculator](https://www.howmanyyardsdoineed.com/square-footage-calculator/) — Total area in square feet, square meters, square yards, and acres from rectangles, triangles, circles, and trapezoids, minus cut-outs. ### Guides - [How to Measure an Irregular Area](https://www.howmanyyardsdoineed.com/guides/measuring-irregular-areas/) — Split odd shapes into rectangles, triangles, circles, and trapezoids, then average width and depth. - [How to Measure a Room for Paint and Drywall](https://www.howmanyyardsdoineed.com/guides/how-to-measure-a-room-for-paint-and-drywall/) — Measure each wall and ceiling, subtract openings, handle gables, slopes, and stairwells, and keep it all on one sheet. ## Sources - [Offsets, Grout Joints and Customer Expectations (May 2025)](https://www.ceramictilefoundation.org/blog/offsets-grout-joints-customer-expectations) — Ceramic Tile Education Foundation. Used for: Offset ≤ 33% where the side being offset is > 15 in nominal, unless the tile maker specifies otherwise; running bond with any side > 15 in: average joint ≥ 1/8 in (rectified) or ≥ 3/16 in (calibrated), plus edge warpage. Checked 2026-10-05. - [CTEF Tile Tip: Be Clear with Customer About Grout Joint Offsets (June 2017)](https://www.stoneworld.com/articles/95288-ctef-tile-tip-be-clear-with-customer-about-grout-joint-offsets) — Stone World. Used for: Earlier wording: maximum 33% offset where the side being offset is greater than 18 in. Checked 2026-10-05. - [Tile School: Doing the Math](https://www.fireclaytile.com/blogs/fireclay-tile-blog/tile-school-doing-the-math) — Fireclay Tile. Used for: At least 15–20% overage; at least 20% for herringbone and similar patterns with more cuts. Checked 2026-10-05. **Estimate only.** Results are planning estimates computed from the numbers you enter. They are not engineering, structural, or code advice. Confirm quantities, product yields, and installation requirements with your supplier, the product label, and your local building authority before you order or build.