Multi-room tile layout: keep grout lines continuous
Whole project · 8 min read · updated 17 September 2026 · Written by Tilelico
An open-plan floor should not be optimised one rectangle at a time. A shared origin and orientation are what keep the grout lines aligned as the tiling passes through a doorway.
Use one shared coordinate system
Every continuous area must use the same grid origin, orientation and pitch. Optimising each room independently gives each one its own best answer and guarantees they disagree at the thresholds.
The offset that results is small — often a few centimetres — which is exactly why it looks like a mistake rather than a variation. The eye reads a broken line long before it can measure it.
One grid, several rooms. It is the same principle as a single chalk line across a whole floor, and it is decided before the first room is optimised.
Continue with: Tile layout planning: the complete method before installation →
Choose the reference room
Optimise the largest or most visible room first, then look at what that choice does to the corridors and smaller spaces downstream.
A small global shift of the shared grid often removes several narrow strips at once. Because the grid is shared, that adjustment is a single decision rather than one negotiation per room.
Continue with: Tile layout plan PDF: what the installer needs →
Handle partitions honestly
A partition wall has a real thickness, and the floor does not exist underneath it. Treating the whole floor as one polygon over-counts the covered area by the footprint of every wall.
Drawing partitions at their actual thickness removes their footprint from the tiled area without shifting the grid — the tiling continues through as though the wall were transparent, which is exactly what happens on site.
Continue with: 60 × 60 tile layout: starting point, edges and quantities →
Separate layout from quantities
A shared grid can still produce a room-by-room quantity report. That is what lets boxes be staged in the right rooms and progress to be tracked area by area.
It also matters commercially: a client usually wants to know what each room costs, even when the floor was planned as a single surface.
The figures quoted here describe common practice, not imposed rules. The data sheet for your covering and for your installation products always takes precedence, and measurements taken on site are the reference.
Frequently asked questions
Must installation start in the reference room?
No. The reference defines the grid; where the installer physically begins depends on access, the drying sequence and how the site is organised.
Can tile direction change between rooms?
Yes, where a threshold or a material change makes the break intentional. Without a visible separation, a change of direction reads as an error.
How do partitions affect the quantity?
They remove their own footprint from the covered area. Ignoring them over-counts the tiles — by a surprising amount across a whole apartment.
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Technical references
This guide describes common installation practices. It does not replace applicable technical documents, manufacturer instructions or measurements taken on site.