The niche has a bad reputation it does not entirely deserve. Yes, you are cutting a hole in the wettest wall of the house, and yes, a lazy build there will leak. But the failure is always in the execution, not the concept, and knowing the difference lets you ask the right questions of whoever builds yours.
Shower niche: done right vs done cheap
| Detail | Done right | The shortcut that leaks |
|---|---|---|
| Waterproofing | Membrane continuous through the niche, all corners and returns treated | Membrane stops at the wall face, niche relies on tile and grout |
| Shelf fall | Around 5 degrees toward the shower so water sheds | Dead flat shelf that ponds water against the back corner |
| Position | On an internal wall, clear of the direct spray line where possible | Cut into an external or shared wall directly under the rose |
| Framing | Recess framed and lined before waterproofing | Hole cut after waterproofing, membrane patched around it |
| Edges | Mitred tile or quality trim, sealed junctions | Raw tile edges with grout bridging the movement joints |
| Certification | Waterproofing by a licensed waterproofer with a Form 16 certificate | No certificate, no accountability when it fails |
Why do some shower niches leak?
Because the niche was cut into the wall after the waterproofing plan was settled, and the membrane was patched around it instead of designed through it. A niche is three extra internal corners, a horizontal shelf, and a set of junctions, every one of which must be carried in the membrane. When a builder treats the niche as a tiling detail rather than a waterproofing detail, water tracks through grout lines, finds an unmembraned corner, and soaks the wall cavity. The insidious part is timing: these leaks show up one to three years later as a musty smell, swollen skirting in the next room, or paint bubbling on the far side of the wall, long after the renovator has been paid. By the time it is visible, the repair usually means stripping tiles.
What makes a niche waterproof?
Sequence and continuity. The recess is framed and lined first, then the waterproofing membrane runs continuously across the wall and through the niche: back, sides, top, and the shelf, with bond breakers and reinforcing at every corner. The shelf is set with a fall of around 5 degrees toward the shower so water sheds instead of ponding. In Queensland, waterproofing in showers is regulated work under AS 3740 and must be carried out by a licensed waterproofer, with a Form 16 certificate covering the work. That certificate is your protection: it means a licensed trade has put their name to the wet area, niche included. When we run a bathroom renovation, the niche is on the waterproofing drawings before anyone picks up a trowel, not improvised on site.
Where should a shower niche go?
On an internal wall wherever the layout allows, ideally out of the direct blast of the shower rose. The niche works hardest when it is convenient to reach but not being pressure washed every morning. Height wise, somewhere around chest height suits most users, and in a family bathroom a taller niche with a shelf serves everyone. Avoid external walls if you can, because you give up insulation and, in older Gold Coast homes, you can meet framing surprises that blow out the cost. And think about size honestly: one generous niche beats two small ones for both waterproofing risk and cleaning.
What does a niche add to a renovation quote?
We price niches within the renovation quote rather than off a flat rate, because the cost depends on the wall, the framing, the tile choice and whether the waterproofing design is already accommodating it, so it is quote on inspection as part of your bathroom renovation. What we can tell you is that adding a niche at design stage is modest money, while retrofitting one into a finished shower is a partial strip-out. Decide early. Our bathroom renovation tiers are published, and a niche slots into any of them.
Planning a shower with a niche that will still be dry in a decade? Call Hills Plumbing & Gas on 0472 657 042 or book through /services/bathroom-renovations/ for a fixed-price Gold Coast renovation with certified waterproofing.
Sources: AS 3740 Waterproofing of domestic wet areas; QBCC waterproofing licensing and Form 16 certification requirements; Plumbing and Drainage Act 2018 (Qld).