When depth, cost or position governs.

It takes less floor build-up than a channel.

It costs a fraction as much.

And it can go almost anywhere.

The fall is arranged around it.

Four planes have to meet at the outlet.

With a crease running to each corner.

A rigid tile cannot lie across a crease.

So the finish is limited to small formats.

Or mosaic, which follows anything.

A rigid sloped board with the falls moulded in.

Cut to the room and laid before tiling.

It builds the compound fall accurately.

Rather than forming it by hand in screed.

Most poor wet room floors skipped one.

It drains a floor, not a shower.

Plantrooms, laundries and kitchens.

Taking washdown and incidental water.

So it wants a debris basket.

And a grating rated to be walked on.

Because everything arrives at one point.

Hair and grit collect in one small place.

A channel spreads them along its length.

So access to the trap is essential.

Choose one that lifts out for cleaning.

Less than a channel, but still a real figure.

Body plus trap, measured overall.

Shallow versions exist for joisted floors.

They trade seal depth for height.

Check both before committing.

Only if the floor is not tiled to the fall.

A sheet finish can follow a compound slope.

Vinyl and resin do it easily.

Rigid tiles cannot, at any size.

Choose the drain and the finish together.