Choosing Tiles for a Tropical Bathroom

Tile selection is usually made in a showroom under bright light on a dry sample board, and then the tile spends fifteen years in a humid room being walked on with wet feet. A few of the decisions are worth making on performance rather than appearance, and they are not the ones most people focus on.

Slip resistance is a rating, not an impression

Floor tiles carry a slip resistance rating, and it is measured rather than estimated. A tile that feels grippy dry can be treacherous wet, and the difference between a floor tile and a wall tile in the same range is often exactly this.

The trade-off is real and worth stating plainly. A more slip-resistant surface has more texture, and more texture holds more soap residue and takes more effort to clean. Anyone who tells you there is a finish with excellent slip resistance and no cleaning penalty is selling something.

Where the balance should sit depends on who uses the room. In a family bathroom or anywhere an older person showers, take the slip resistance and accept the cleaning. In a rarely used guest ensuite, a smoother tile is a reasonable choice. In a shower with no step, the shower floor is where it matters most.

Format, and the fall problem

Large format tiles look excellent and reduce the number of grout joints, which is a genuine advantage in a humid room. They have one hard limitation: a floor has to fall to the waste, and a large rigid tile cannot follow a slope in two directions without lipping at its edges.

That is why shower floors are commonly set in a smaller format or a mosaic while the main floor uses a large tile. A mosaic articulates across a fall because each piece can sit at a slightly different angle. It is not a decorative choice, it is a geometric necessity, and a large tile forced onto a shower fall will either lip at the joints or the fall will be flattened to suit the tile, which produces ponding.

On the main floor, outside the shower, large format is usually the better answer and it makes a small room read larger, not smaller.

Grout colour is the decision people regret

More renovation regret attaches to grout colour than to tile choice, and the reason is climate.

Grout is porous. In a room whose joints stay damp for much of the year, a very pale grout on a floor or a shower will discolour, and while sealers help and are worth applying, none of them prevent it indefinitely. A brilliant white grout in a wet zone looks superb for a year and then looks neglected regardless of how hard anyone cleans it.

The approach that ages best is to use a mid tone in the wet zones, where staining would show, and a lighter tone on dry walls where it will not. The change is barely noticeable in the room and it makes an enormous difference at year five.

Where the budget allows it, an epoxy grout in the shower is effectively non-porous and will not stain at all. It is more demanding to install and costs more, and in a heavily used or short-stay bathroom it repays that quickly.

Junctions get sealant, not grout

Internal corners and the wall-to-floor junction should be finished in a flexible sealant rather than grouted, because those joints move and rigid grout cracks. Colour-matched sealant makes the change nearly invisible. A bathroom grouted hard into every corner will show a crack line along at least one of them within a couple of summers.

Two practical extras

Buy more than you need. Ten percent over is the usual allowance for cuts and breakage, and having a few spares put away in the shed is worth a great deal the day a tile is damaged and the range has been discontinued.

Check the lead time before committing. A tile on a long import lead can stall a whole renovation, and no tile is worth holding a bathroom hostage for six weeks.

See bathroom tiling in Cairns, or call 0468 047 067.