Good tiling is decided before the first tile is fixed. Setting out, substrate flatness and joint planning are what separate a crisp floor from a patchwork of cuts.
Tiling is the most visible trade in a finished building and the one most often started without a plan. Where the first tile goes decides where the cuts land, whether a door threshold works, whether a shower falls to its drain and whether the grout lines in two adjoining rooms line up. This is the sequence a controlled tiling package follows, from the setting out drawing to the protection that keeps it intact until handover.
Before stage one
Tiling cannot start until the substrate is right, because tiling does not correct a bad floor or wall, it exposes it. Flatness, soundness, moisture and the position of every penetration need to be settled, along with the actual tile, since the final tile size and thickness change the setting out and the levels at thresholds.
- The actual tile approved, with size, thickness, edge and batch confirmed from delivered stock.
- Substrate flatness and soundness verified against the specification and recorded.
- Substrate moisture measured and accepted by reference to the adhesive requirements.
- Waterproofing complete and flood tested in all wet areas, with adhesive compatibility confirmed.
- A tiling setting out drawing per room showing the first tile, cut positions and movement joints.
Stage 1: Produce a setting out drawing for every room
Draw the tile layout room by room, deciding where full tiles start and where cuts fall. Cuts belong in the least visible positions, not at the entrance to a room. Grout lines should align through door openings where rooms share a finish, and the layout should avoid very narrow cut strips at walls, which look like a mistake even when they are deliberate.
- Deliverable: Approved setting out drawings per room, including walls where wall and floor joints should align.
- Owner: Tiling subcontractor with the architect or interior designer.
- Approval gate: No tiling until the setting out drawing for that room is approved.
Stage 2: Confirm the levels at thresholds and against other finishes
Work out the finished floor level in every room from the substrate plus adhesive plus tile, and check it against adjoining finishes, door undercuts, thresholds to terraces and the top of any drain. A tile thickness change between two rooms creates a step that nobody wants, and it is discovered late if the arithmetic is not done early.
- Deliverable: A finished floor level schedule by room with threshold details resolved.
- Owner: Site engineer with the tiling subcontractor.
- Approval gate: Threshold details agreed before tiling the first adjoining room.
Stage 3: Set the falls in wet areas and prove them before tiling
In showers, bathrooms, balconies and plant rooms, the fall is formed in the substrate and the tiling follows it. Prove it with water poured on the prepared substrate before tiling. A tiler asked to create a fall out of adhesive thickness will produce a dished area near the drain and flat ground elsewhere, which ponds.
- Deliverable: A water test record on the substrate confirming the fall to each drain.
- Owner: Contractor, witnessed by the supervising engineer.
- Approval gate: Falls accepted before tiling starts in any wet area.
Stage 4: Fix with the right adhesive and full coverage
Use the adhesive specified for the tile, the substrate and the location, applied with the correct notched trowel and, for large format and external tiles, back buttered to achieve the coverage the standard requires. Dabs of adhesive under the corners of a large tile leave voids that crack the tile when it is loaded and let water sit under it outdoors.
- Deliverable: A record of adhesive type and application method, with periodic lift and check of a tile to verify coverage.
- Owner: Tiling subcontractor.
- Approval gate: Coverage verified on a sample at the start of each area.
Stage 5: Form movement joints as drawn
Install perimeter joints at every wall and column, intermediate joints at the intervals the specification sets, and joints over every structural movement joint. In large sunlit areas such as terraces the intervals shorten. Filling these with grout defeats them, so the correct filler or profile must be on site before tiling starts.
- Deliverable: Movement joints installed per the setting out drawing with the specified filler, photographed.
- Owner: Tiling subcontractor.
- Approval gate: Joint materials on site and positions marked before tiling begins.
Stage 6: Grout, and check the finished tolerances
Grout after the adhesive has cured for the specified period, with the grout type specified for the joint width and the exposure, since wet areas and external tiling need different products. Then measure what was built: lippage between adjacent tiles, joint width consistency, flatness under a straight edge and level against the design.
- Deliverable: A measured tolerance check per area against the specification, with any out of tolerance work listed.
- Owner: Supervising consultant.
- Approval gate: Area accepted before the next one starts, so errors do not repeat through the building.
Stage 7: Protect the finished tiling until handover
Tiled floors are damaged by the trades that follow: dropped tools, scaffolding, grinders cutting nearby, plaster splashes and chemical spills. Protect with a breathable covering suited to the finish, and never seal a fresh floor under impermeable sheeting, which traps moisture and can cause staining and efflorescence.
- Deliverable: A protection method statement per finish type and an inspection record during the following trades.
- Owner: Site manager.
- Approval gate: Protection in place before any other trade re-enters the area.
Handovers between stages
Three handovers decide whether tiling succeeds. From the waterproofing applicator, where the critical transfer is adhesive compatibility and physical protection of the membrane. From the screeding contractor, where the transfer is flatness, soundness and a recorded moisture reading. And to the trades that follow, where the transfer is protection and a rule that nothing is cut or ground over a finished floor. Each should be a short recorded inspection, because each one is where responsibility for a later failure becomes contested.
How you know it is finished
The package is complete when every room has an approved setting out drawing that matches what was built, the wet areas have a substrate water test and a flood test record, coverage was verified during fixing, movement joints exist where the drawing shows them, and a measured tolerance check per area is signed. If tiling was laid without a setting out drawing, the cuts will tell you where they ended up, and by then the only remedy is to take the floor up.
Domira builds and supervises projects across Saudi Arabia, and this is the level of detail its site teams work at. Send the drawings or the site, and Domira will tell you what the specification has to say before anyone prices it.
Frequently Asked Questions
Where should you start tiling a room?
From a setting out line chosen so that cuts land in the least visible positions and no very narrow strips appear at the walls, with grout lines aligned through openings into adjoining rooms where the finish continues. That line is decided on a drawing before any tile is fixed. Starting from a corner or a wall without planning is how a room ends up with a sliver cut at the entrance.
What is lippage in tiling and how much is acceptable?
Lippage is the height difference between the edges of two adjacent tiles. The acceptable limit is set in the specification and depends on the tile size, the edge type and the joint width, and large format tiles with narrow joints are far less tolerant. It is caused by an uneven substrate, insufficient adhesive coverage or tile warp, so the substrate check matters most.
How much adhesive coverage does a tile need?
Standards express it as a percentage of the tile area in contact with adhesive, higher for external and wet areas and for large format tiles, which usually require back buttering as well as a notched bed. Verify it by lifting a freshly laid tile at the start of each area and looking at the back. Dabs at the corners are not an acceptable method.
Why do balcony and terrace tiles fail more often than internal ones?
Because they face temperature swings, direct sun, water and sometimes freezing in higher altitudes, all of which cause movement and drive water into any void. The usual failures are insufficient adhesive coverage leaving voids where water sits, missing movement joints, a lost or inadequate fall, and waterproofing that stops at the tile bed instead of being a separate layer beneath it.
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