On a floor, a bad start leaves thin strips along one wall and a full row of awkward cuts. Fixing that on the open bag is expensive. Fix it on the plan first — that is what a floor tile layout (and a tile layout visualizer) is for.
Direct answer
Measure length and width in several places. Choose pattern (straight, offset, herringbone, or diagonal). Enter sizes in a layout planner, try centre vs corner starts, and keep edge cuts at or above 50 mm. Order from the piece-count list, not from a flat waste percentage.
Why floors punish bad starts
Walls can hide a thin cut behind a vanity or towel rail. Floors cannot. A 25–40 mm strip along a long wall:
- snaps when you try to set it,
- looks like a mistake under grazing light,
- often means you bought the wrong box count because you assumed “+10%” would cover pattern waste.
Herringbone and diagonal make this worse: more angled cuts, more offcuts, and a higher chance that a “pretty” start creates a fragile edge somewhere else in the room.
Steps
- Measure length and width in several places; use the values you will actually tile to (ignore skirting thickness until you know how the tiler finishes the edge).
- Choose pattern: straight, offset, herringbone, or diagonal — see layout patterns.
- Enter sizes in the tiling planner (floor mode), including joint width from the tile datasheet.
- Try centre or corner starts until edge cuts stay at or above 50 mm (Sliver Guard).
- Add floor openings (hatches, stairs, fireplace hearth) so net area and cuts stay honest.
- Check the door threshold: the last row should not force a 20 mm strip against the wall.
- Order from the piece-count list, then round to pack size.
Worked example
Room 3.60 m × 2.80 m, 600×600 mm porcelain, 3 mm joints, straight grid.
- Naive corner start on the long wall can leave a narrow remainder on the opposite wall once joints accumulate.
- In the planner, switch start to centre of the dominant door or room axis.
- Confirm both long edges stay ≥ 50 mm (or accept one intentional wide cut that is still full-thickness and stable).
- Read whole tiles + cut sizes; convert to boxes using the pack count on the label.
- If you switch to herringbone for the same room, re-run the bill — do not reuse the straight-grid box count.
Doorways, hatches, and open-plan floors
- Doorways. Plan where the tile joint meets the threshold so you do not end on a splinter.
- Hatches / stairs. Model them as openings; otherwise the piece list over-orders and the layout lies.
- Open-plan living. One continuous floor across kitchen and lounge needs a single origin story — pick a visual axis (island, window wall) and lock it before ordering.
Visualizer vs m² estimate
A square-meter estimate cannot show whether herringbone leaves a dagger of tile at the patio door. A layout visualizer can. Use the visual for design buy-in; use the piece list for purchasing.
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