A tile is one of the few materials in a home asked to be two things at once: a finish you fall in love with and a piece of technical equipment. The showroom sells the first. The second—the part that decides whether a floor is safe underfoot, if a counter shrugs off a dropped pan or a terrace survives a hard freeze—rarely makes it onto the sample board. Yet it determines if a project ages gracefully or apologetically.
The good news is that ceramic is one of the most honest materials you can specify. Before starting your next project, build a cheat sheet of the functional must-haves for each space, then work with a knowledgeable distributor to narrow your options before you enter the showroom.
Ceramic or porcelain? Start with one number
All porcelains are ceramic, but not all ceramics are porcelain. The distinction comes down to water absorption. Porcelain absorbs 0.5 percent or less of its weight in water, while glazed ceramic typically falls between 3 and 7 percent. That difference explains why porcelain performs better in wet, high-traffic or freeze-to-thaw environments. Ceramic remains an excellent choice for walls and light-duty surfaces. Because “porcelain” is sometimes used as a marketing term, always verify the absorption rate on the spec sheet.
Floors: where slip resistance is not optional
For any floor that could get wet, grip matters most. There’s an industry standard test (called DCOF) that measures how slippery a tile is when wet. Tiles need to hit a minimum score to be considered safe for spots like entryways, kitchens and bathrooms. Around pools or on ramps, you want even more grip than the minimum.
Here’s the catch: A shiny, polished tile looks great, but that same shine gets slippery when wet. So, save the glossy finishes for walls or dry, low-traffic rooms. Matte or textured tiles are the safer choice anywhere water is likely to show up. If you want one tile finish that works well across different rooms, look for glazes marketed as “In/Out” or “All Over.” These are designed to balance a nice feel and easy cleaning with safety, while still prioritizing slip resistance above all.
Bathrooms: Match the tile to the plane
A bathroom is really three different applications: Walls, floors and shower floors. Walls stay relatively dry, making them ideal for glossy ceramic, crackle glazes or handmade zellige. Floors require matte or textured porcelain that exceeds the recommended DCOF threshold. With the evolution of linear drains, the same large tile from the bathroom floor can run right into the shower, as long as it’s slip-resistant. Wet areas also do better with denser tile, since it soaks up less moisture over years of daily use, but even the best tile only works if the waterproofing underneath is done right.
Indoors versus out: The freeze decides
Outdoors, frost resistance becomes the defining characteristic. Water trapped in an absorbent body expands when frozen, eventually cracking the tile or damaging the glaze. Frost-rated porcelain is the dependable choice for terraces, walkways and pool surrounds in freezing climates. The 20-millimeter porcelain paver is one of the category’s most versatile products. It can be installed over gravel, sand, grass or pedestal systems while supporting substantial loads. Matching interior and exterior versions of the same tile also creates seamless transitions from house to garden. Porcelain’s non-combustible fire rating makes it a strong choice for hardscaping and ventilated rainscreen façades in wildfire-prone regions.
The specifier’s shortlist
Selecting ceramic comes down to asking each surface what it will be expected to endure. The best spaces are not the ones with the rarest or most expensive tile, but the ones where every surface is doing exactly the job it was engineered to do.
—Ryan Fasan, Ceramic Tile Technical Spokesperson for Tile of Spain
