Most people choose tile with their eyes, which is the right place to start. You should like what you are looking at every morning. But on Cape Cod there is a second filter worth applying before you commit to a box of anything, and it has nothing to do with color: how the material handles water, salt air, and a house that sits cold and closed from November to April.
We install tile in Sandwich, Barnstable, Falmouth, Mashpee and across to the South Shore, and the bathrooms we get called back to look at are rarely failing because someone picked an ugly tile. They are failing because of absorption, a floor that was never sloped properly, or a grout joint that was asked to do a job grout cannot do. So here is the material conversation the way we have it on a site visit.
Water absorption is the number that matters
Every tile has a water absorption rating, measured as a percentage of its own weight. It is the single most useful spec on the box and most homeowners never see it, because the showroom display is about finish and format.
The categories, from least absorbent to most:
| Category | Water absorption | Where it belongs |
|---|---|---|
| Impervious (porcelain) | 0.5% or less | Shower walls and floors, bathroom floors, any wet area, exterior |
| Vitreous | Above 0.5% up to 3% | Bathroom floors, walls, light wet use |
| Semi-vitreous | Above 3% up to 7% | Walls, dry areas. Not a shower floor |
| Non-vitreous | Above 7% | Decorative, dry interior walls only |
Why this matters here specifically: an absorbent tile in an unheated or barely heated coastal house takes on water, and water that sits in a tile body and then freezes expands. That is the freeze-thaw cycle, and it is what breaks tile from the inside. A summer house in Chatham that gets dropped to 50 degrees in December, or a three-season room off the back of a Dennis ranch, is a harsher environment than most people think. Your primary bathroom in a heated year-round home in Sandwich is a much easier assignment.
Ask the supplier for the tile's absorption rating and its intended use — wall, floor, or both. If a tile is rated wall-only, no setting material, membrane or installer skill changes that. We would rather have that conversation before you buy than after.
Porcelain: the default, and why
Porcelain is where most Cape Cod bathroom projects land, and it is not because it is trendy. It is fired denser and hotter than standard ceramic, which is what gets it to that 0.5%-or-less absorption number. In practice that means it does not care about a wet shower floor, it does not care about a cold winter in a closed-up house, and it does not care about the salt in the air.
The other thing porcelain does well is imitation, and this is where it has genuinely changed in the last decade. Wood-look porcelain plank, marble-look porcelain slab, cement-look, terrazzo-look. The printing on current product is good enough that visitors do not identify it as porcelain, and you get the look without the maintenance that comes with the real material.
Through-body versus glazed
Two kinds worth knowing apart. A glazed porcelain has its color and pattern in a surface layer over a differently colored body. Chip it hard and you see the body underneath. A through-body (or full-body) porcelain carries its color all the way through, so a chip is much less visible. For a bathroom floor that is going to see dropped shampoo bottles rather than dropped tools, glazed is usually fine. For a mudroom, an entry off the deck, or a high-traffic hallway, through-body is worth asking about.
Slip resistance on a wet floor
A polished porcelain is beautiful and slick, and a polished porcelain on a shower floor is a decision we will push back on. For wet floors you want texture — a matte or honed finish, a structured surface, or a smaller tile that gives you more grout lines, because grout has grip. If someone in the house is older or less steady, say so early; it changes the floor tile and sometimes the whole shower layout.
Ceramic: fine on walls, careful on floors
Ceramic gets dismissed too quickly. For shower walls and tub surrounds it is a perfectly good material, it is easier on the budget than porcelain, it cuts more forgivingly, and the glazed finishes available in ceramic — especially the handmade-look and crackle glazes — include things porcelain simply does not do as well.
That classic white subway tile look, the kind in a lot of Cape houses, is a ceramic conversation more often than a porcelain one, and that is the right call. Walls do not take foot traffic and they do not pond water.
Where ceramic needs more thought is the floor. Standard wall ceramic is softer and more absorbent, and on a bathroom floor it is more prone to cracking and to wear patterns in the glaze. There are floor-rated ceramics and they work, but check the rating rather than assuming. And a shower floor is not a place we would put ceramic.
Marble and natural stone
Marble in a bathroom is a real thing people want and we install it. It should come with a clear picture of what owning it is like, because marble is a stone that reacts.
It is porous, so it absorbs. It is calcium carbonate, so it etches — meaning acid dulls the polish, and the acids in question are ordinary bathroom items. A splash of toilet bowl cleaner, an acidic shower spray, a dropped bottle of something with citrus in it. Etching is not a stain you scrub out; it is a change to the surface. Marble also needs sealing, and sealing is maintenance, not a one-time step.
None of that is an argument against marble. Plenty of houses have had marble bathrooms for a century. It is an argument for knowing it up front, choosing a honed finish over a polished one if you want etching to be less visible, and using a pH-neutral cleaner from day one. If what you actually want is the look rather than the stone, a marble-look porcelain gets you most of the way there with none of the upkeep, and we will show you both.
Slate, travertine, limestone
Slate is tough and handles wet areas well, though the cleft surface means dirt and soap collect in the texture and it wants more frequent cleaning. Travertine and limestone are softer and more porous again, want sealing, and in travertine's case usually want the natural voids filled. In a coastal house that goes unheated in winter, we are cautious with all of the softer stones.
Natural stone varies lot to lot. The slab or box you get is not the sample in the showroom. For stone we want to see the actual material before layout, because vein direction and color range change how we set it.
Shower floors: mosaic, pebble, large format
The shower floor is the hardest-working square footage in the house. It has to drain, it has to not be slippery, and it has to sit on a slope.
Mosaic on mesh sheets — small hexagons, pennyrounds, two-inch squares — is the workhorse, and for a good reason. Small tile follows a sloped floor. Because each piece is small, the sheet conforms to the pitch toward the drain without any individual tile having to bend. You also get a lot of grout lines, which is traction underfoot.
Pebble is popular and we install it, and you should know what you are getting. It looks great, it drains, it feels good barefoot if you pick a flat-ground pebble rather than a rounded river stone. It also has a lot of grout surface relative to stone surface, which means more area to keep clean. If anyone in the house finds an uneven floor uncomfortable, pick a flatter pebble or go to mosaic.
Large-format tile on a shower floor is possible but it is a specific job. A big tile cannot follow slope in two directions, so it needs either a linear drain along one wall — so the floor pitches in a single plane — or careful cuts. If you want a large-format shower floor, say so before the shower pan goes in, because it changes the drain and the pan, not just the tile. We cover the trade-off in more detail in large format versus mosaic.
Tile size and a sloped floor
The general rule, for walls as much as floors: the bigger the tile, the flatter the surface underneath has to be. A 24-by-48 porcelain panel shows every hump in a wall, because there is no grout line nearby to absorb the transition. An older Cape house with original framing and a few generations of repairs does not have flat walls, and nobody should pretend otherwise.
That is solvable. It means more time in preparation — flattening, floating, sometimes a layer of board — before any tile goes up. It is one of the places where a big tile costs more in labor than the tile itself costs, and it is worth knowing when you compare two numbers that look different. More on that in why the waterproofing matters more than the finish.
Five choices that cause callbacks
- A polished tile on a wet floor. It looks sharp dry. It is a hazard wet. Matte, honed, or structured for anything that gets rained on.
- A wall-rated tile used on a floor. It is on the box. People miss it because the showroom display does not lead with it.
- An absorbent tile in a house that goes cold. Summer houses and unheated additions need impervious material. Freeze-thaw breaks tile from inside the body.
- Dark grout with a light porous stone, or the reverse. Pigment can migrate into a porous unsealed stone. Sealing first matters, and so does testing on a spare piece.
- Choosing the tile before the layout. A tile that needs a specific pattern, or that only comes in one size, can force an awkward cut at the one wall you look at every day. Layout and material are one decision, not two.
Questions we get asked
Is porcelain always better than ceramic?
For wet floors and shower floors, effectively yes, because of absorption. For shower walls and tub surrounds, a good glazed ceramic is a sound choice and sometimes gives you a finish porcelain cannot. The right answer depends on where the tile is going.
Can I use the same tile on the floor and the walls?
Often, if the tile is floor-rated and has enough slip resistance for a wet floor. It reads as a calm, continuous space, and it is a common request. On a shower floor specifically, check the size against the slope — see the shower floor section above.
Does salt air damage tile?
Properly specified porcelain and well-sealed grout handle coastal air without trouble. Where we see salt and moisture cause problems is in the things around the tile — metal trim and fixture finishes, and any substrate that was not protected.
What about radiant floor heat under tile?
Tile is a good surface over radiant heat, and we install heated floor systems. It needs to be planned before the floor build-up, because it changes the height of the finished floor and how it meets the doorway and the adjoining room.
Can you help me choose, or should I show up with a decision?
Bring what you like and we will work through format, layout and grout with you, and point you to local suppliers. After the estimate you get the quantities to order for the walls, the shower floor and the main floor.
Bring the tile you like. We will tell you where it works.
Tell us your town and what you are planning. Lucas calls you back, usually the same day, and comes out to measure. Cape Cod and the South Shore.
Tiles by Fox · Sandwich, Massachusetts · Licensed and insured · MA HIC #219595
Written by the Tiles by Fox crew from our own installations on Cape Cod and the South Shore. Material ratings described here are industry classifications — confirm the specific numbers for the tile you are buying with your supplier, because they vary by product. Nothing here is a substitute for a look at your actual bathroom.