Work through five constraints in order: available floor build-up, existing pipe position, shower size and flow, floor finish, and whether the drain should be visible. The first two usually eliminate most options immediately.
Step 1: Measure the floor build-up
Measure from the structural slab to the finished tile surface, at the drain position. This is the hard constraint that decides whether a linear drain will fit at all.
| Build-up available | Options |
|---|---|
| Under 40 mm | Ultra-thin linear drain, side outlet |
| 40–60 mm | Low-profile linear drain |
| 60–90 mm | Standard linear drain |
| 90 mm+ | Full range, including high-capacity bodies |
Step 2: Confirm the pipe position
Horizontal, vertical or side outlet — and where the pipe actually runs. A drain that fits the floor may not fit the structure underneath, particularly through timber joists.
Step 3: Size for the shower
Match the drain length to the shower opening width and the flow rate to the shower output. See what size linear shower drain do I need.
Step 4: Match the floor finish
| Floor finish | Grate choice |
|---|---|
| Large-format tile | Tile-insert or slim steel grate |
| Natural stone / marble | Tile-insert, cut from the same stone |
| Small ceramic tile | Steel grate — brushed or matte black |
| Vinyl / LVT | Steel grate with sealing flange |
Step 5: Decide on visibility
If the drain should disappear, use a tile-insert and set it against the wall. If it can read as a design line, choose the finish to match the tapware — brushed steel, polished, or matte black.
Send us your build-up, opening width and floor finish and we will confirm the specification. Request a Quote