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Bathroom

A bathroom sees more moisture, hour for hour, than any other room in the house. The finish either sheds it or holds onto it.

Renovated bathroom interior
Room fit

The best flooring for a bathroom is porcelain or ceramic tile, properly waterproofed underneath. Humidity in a bathroom is constant, not occasional, and the surfaces in it have to be built for that difference rather than merely resist it. Laminate’s core swells at its seams the same way it does in a kitchen, but a bathroom gives it more chances to fail: direct splash near the tub, condensation on every surface after a shower. Tile alone isn’t the whole answer either, because grout lines are porous, and water that gets through them needs a membrane underneath to stop it reaching the subfloor, not just a waterproof-looking surface. The same trapped moisture is why standard flat paint struggles here: its texture holds humidity long enough for mould to get a foothold, which is what a mould-resistant, scrubbable finish is built to resist.

Material decisions

What This Room Has to Survive

What goes into this room, what stays out of it, and why.

What the room has to handle What that rules out What we’d install
01Constant humidity from showers, and direct splash near the tub Laminate: moisture gets into the seams and the core swells, even if the surface looks fine Porcelain or ceramic tile, properly waterproofed underneath
02Mould risk on walls and ceiling from trapped steam Standard flat paint: its texture holds moisture and gives mould a foothold A mould-resistant, scrubbable bathroom-rated paint
03Bare feet on a cold floor first thing in the morning Uninsulated tile laid straight onto a cold subfloor Tile with underfloor heating, or a warmer-underfoot vinyl

Questions About Bathroom Work

The tile surface sheds water, but grout lines are porous, and water that works through them needs somewhere to go other than the subfloor. A proper waterproofing membrane under the tile, not the tile alone, is what actually stops a slow leak from becoming rotted subfloor you don't discover until it's expensive.

The mould resistance comes from an additive in the paint itself, not from how the can is labelled. Look for a satin or semi-gloss finish specifically sold as mould-resistant, since the smoother finish also gives mould less surface to grip than a flat one does. A flat finish from the same paint line will not perform the same way.

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