Bathroom kerbs: why that little step is dangerous and how to remove it

That concrete step at the bathroom door — 10 to 15 cm high, in almost every Malaysian house built before the 2010s — can absolutely be removed. But understand what the job really is: removing a kerb is a floor job, not a hacking job. The water the kerb was damming up has to be managed by slope and drainage instead, so the floor gets re-screeded with proper falls, re-waterproofed and retiled. Done as part of a bathroom refresh, that lands in the RM 3–8k range. If that is not in this year's budget, a bevelled rubber or aluminium ramp laid over the kerb costs RM 30–150 and removes the trip edge today.

Why bother at all? Because for an older person the kerb is the most dangerous half-second in the house: stepping over a raised edge, on wet tile, usually while turning through a doorway, sometimes at 3 a.m. The foot that clears the kerb lands on a sloped wet floor while the other foot is still behind it. Families tend to call it the fall that changed everything. It deserves more worry than the slippery floor everyone focuses on.

Why the kerb is there in the first place

It is a dam. Older Malaysian bathrooms are wet rooms — the whole floor gets splashed — and the kerb is what stops that water wandering out into the hallway. Remove the dam without giving the water somewhere else to go and you trade a trip hazard for a soaked corridor, and in an upstairs bathroom, a stained ceiling below. That is why hack it off and tile over always fails, and why the proper job is priced the way it is.

What proper removal involves

1. The floor comes up, not just the kerb. Here is the detail most quotes gloss over: the waterproofing membrane in the floor turns up into the kerb — the kerb is the membrane's upstand, cast together with the floor. Saw the kerb off flush and you have sliced that membrane open along the whole doorway. Once the kerb goes, the floor's waterproofing has to be redone regardless.
2. Re-screed with real falls. A wet-area floor needs a slope of roughly 1 in 60 towards the drain. Over a 1.5 m shower area that is barely 2.5 cm of height difference — far too little to judge by eye, which is why it has to be set out with levels. Floors tiled flat by feel are exactly why so many bathrooms pond water.
3. A linear drain where the kerb was, or at the shower threshold. A long, narrow stainless channel catches water across the full width of the opening before it travels. Where it can go depends on where the existing outlet pipe sits — and in upstairs bathrooms, on how much screed depth the concrete slab allows. That pipe position, more than anything else, decides the final price.
4. New membrane, then a ponding test. Fresh waterproofing across the whole floor and up the walls, then the floor is flooded and left for 24 hours before a single tile goes down. A contractor who skips the ponding test on a level-access floor is gambling with your downstairs ceiling — see our waterproofing work for why we refuse to skip it.

Options and honest costs

When it is worth doing properly

If someone in the house uses a walking frame or a wheelchair, a ramp is a delaying tactic and level access is the real answer — ideally done together with grab bars, a shower seat and non-slip flooring, so the waterproofing is only disturbed once instead of job after job. That combined approach is exactly what our elderly bathroom package covers. And if the kerb you want gone is in an upstairs bathroom, treat the waterproofing as the main event rather than a line item — it is the part protecting every room underneath.