Bathroom tile is a waterproofing job with a decorative finish
Bathroom tile and flooring is the part of a bathroom people choose from a showroom board and the part that fails from behind. Tile is not waterproof. Grout is not waterproof. What keeps water out of your floor joists is the membrane and the pan underneath, and that layer costs a fraction of the tile while deciding whether the room lasts twenty years or leaks in four.
Installed market ranges in Southeast Michigan. Simple subway tile runs $8 to $15 per square foot. Large-format porcelain runs $12 to $25. Natural marble and designer patterns run $40 to $80. On a fifty-square-foot shower that is $1,600 at the subway end and $4,000 at the marble end, and the labor difference between them is most of the gap rather than the material.
Two additions worth budgeting. Electric radiant mats under the floor run $1,500 to $3,000, and in a Michigan bathroom that is the upgrade clients bring up unprompted years later. Luxury vinyl plank, where tile is not required, runs $5 to $10 installed and is a legitimate answer in a guest bath or a powder room. Those are market figures rather than a quote.
What actually keeps the water out
A wet-area assembly has four layers and only one of them is visible. Framing and a flat substrate. Cement backer board or a foam board panel. A waterproofing membrane, either a sheet product or a liquid applied in two coats to a wet-film thickness the manufacturer specifies. Then thinset and tile.
Where installers cut corners is the membrane, because nobody sees it and it adds a day. Green board is not a shower substrate. Drywall behind tile in a shower is a failure with a date on it. A pan that is not pre-sloped or not properly pitched to the drain holds water under the tile and the first sign is grout that stays dark.
The corners and the changes of plane matter more than the field. Inside corners, the curb, the bench top and the pipe penetrations are where leaks start, and they get banded or pre-formed rather than trusted to a bead of sealant. Our guide to porcelain, ceramic and stone covers the material side, and the Michigan tile and flooring piece covers what we specify and why.
The economics are stark. Getting the waterproofing right adds a few hundred dollars to a shower. Getting it wrong costs $2,000 to $6,000 in mold remediation, $3,000 to $8,000 in framing repair, and $500 to $1,500 in ceiling and paint below. Ask any bidder to name the membrane they use. The ones who cannot are telling you something.
Grout, and the one specification that matters
Cement grout is porous. It absorbs water, it absorbs soap, it stains, and it needs sealing every year that nobody actually does. Epoxy grout costs more to buy and more to install, does not absorb anything and needs no sealing. In a shower and on a bathroom floor it is worth the difference every time.
Grout joint width is the aesthetic decision people underestimate. A tight joint on a rectified large-format tile reads as a continuous surface. A wider joint on handmade or uneven tile is not sloppiness, it is what the tile requires, and forcing a narrow joint on an irregular tile guarantees lippage you will see every morning. Color choice does the rest: matching the grout to the tile calms a pattern down, contrasting it turns the layout itself into the feature.
On a floor, one number governs safety. The industry standard for level interior areas expected to be walked on wet is a dynamic coefficient of friction of at least 0.42, and a tile that meets it will say so on the spec sheet. Small format helps too, because more grout lines mean more traction, which is the same logic behind the surfaces on our eco-friendly bathroom page. A polished large-format marble floor is beautiful and is the wrong floor for anyone unsteady, which is the whole argument on the accessibility retrofit page.
Where the floor meets everything else
Tile plus mortar plus backer board sits taller than the hallway floor outside the door, which means the threshold is a design decision rather than an accident. The good version adjusts the subfloor so the finished heights meet flush. The cheap version is a metal reducer strip, and you will catch a toe on it.
Inside the room the transitions matter as much. A curbless shower needs the pan recessed into the floor structure, which means opening the subfloor and working between joists, and whether that is easy or expensive depends on which direction the joists run. A linear drain against the wall gives a single-plane slope that is easier to lay large-format tile into than the four-way pitch of a center drain, and it is easier to roll a wheelchair across.
Under a vanity, run the tile through rather than stopping at the cabinet toe kick. It costs a little more material and it means a vanity can be replaced in ten years without a tile repair. Same logic behind the toilet: a floor that runs continuously under the flange is a floor that survives a fixture change.
Heated floors, and why they belong in this climate
Electric radiant mats run $1,500 to $3,000 in a typical bathroom, installed under the tile and controlled by a programmable thermostat. Two things make them worth it here beyond comfort. A warm floor dries after a shower instead of staying damp, which is half the mold argument in a Michigan bathroom. And a tile floor at fifty-eight degrees in February is a floor people avoid with bare feet, which is how bath mats and slip hazards accumulate.
Compatibility is straightforward on tile and stone, which conduct well and do not care about the temperature. Under luxury vinyl plank it depends entirely on the product and the manufacturer’s written approval, which gets confirmed before the order rather than after. Our heated flooring page covers the systems and the controls.
One sequencing note. The mat goes in during the tile installation and cannot be added later without pulling the floor, so this is a decision made at design, not a change order at the end.
What Michigan does to a bathroom
Two climate facts drive most of what we specify. In January the temperature difference between the inside of your bathroom and the outside face of an exterior wall regularly exceeds seventy degrees, and that gradient puts condensation on cold surfaces whether anyone showered or not. In July the outdoor humidity runs above seventy percent and indoor levels sit at fifty-five to sixty-five even with air conditioning. Mold becomes active above eighty percent relative humidity, which a poorly vented bathroom hits every single day.
Which means tile choices interact with ventilation choices. A beautifully tiled bathroom with a builder-grade fan is a bathroom that will show black grout lines in the corners within two years, and the tile is not the problem. The lighting and ventilation page covers the fan sizing, and it is worth reading before you pick a tile.
In the older housing stock around Ann Arbor and Ypsilanti, add a third factor. Second-floor bathrooms in 1920s houses sit on joists that have settled, and the floor is rarely flat. Large-format tile shows every dip, so those rooms get either self-leveling compound first or a smaller format. We check with a straightedge before quoting rather than after demolition.
What to look at before you spend anything
Five checks tell us most of the budget, and you can do four of them today.
- Push a straightedge across the floor and look for daylight underneath. That gap is the leveling line item.
- Look at the grout in the shower corners. Dark, soft or missing grout means water has been getting behind it already.
- Press the wall inside the shower at the bottom corner. Any give means the substrate is compromised and the wall is coming out.
- Check the ceiling in the room below for staining, which tells you the leak is not hypothetical.
- Find your joist direction from the basement or the floor below if a curbless shower is on the wish list.
The fifth is ours: we pull a tile and look at what is behind it, because a 1965 mud-set installation and a 2005 backer-board installation lead to different scopes and different money. Selections then follow the sequence on the bathroom design page, and the stages are laid out on the renovation timeline.
Questions we get asked
Can you tile over my existing tile
On a floor, sometimes, if it is well bonded and dead flat and the added height works at every threshold. In a shower, no. Tiling over shower tile buries whatever is failing behind it and adds weight to an assembly you cannot inspect.
Large format or small
Large format on walls looks calm and cuts grout lines to clean. On floors it needs a flat substrate and it gives up traction, so in a family bathroom we usually put large format on the walls and a smaller, rated tile on the floor. A Jack-and-Jill bathroom shared by children is the clearest case for it.
Is marble a mistake in a bathroom
Not a mistake, a commitment. Marble etches from anything acidic, needs sealing, and shows water spots. It looks better than anything else on this page and it wants an owner who accepts maintenance. Porcelain that looks like marble has closed most of the visual gap and none of the maintenance.
How long does the tile take
Four to seven days for a typical bathroom, because thinset and grout each need to cure and neither can be rushed. Add days for waterproofing cure time. That is the stretch where the bathroom is fully out of service, and we tell you which days those are rather than letting you find out.
Bring us a piece of your grout
We are a design-build contractor in Ypsilanti, so the drawings, the permits and the crews sit under one contract. See how a project runs, view our portfolio, or check current figures on Michigan bathroom costs. Related surfaces are on countertops and shower doors, and the full room is on bathroom remodeling.
Contact us now for a free quote, or call the shop at (734) 540-0347. If the grout in your shower corner crumbles when you scratch it, take a photo and bring it. That tells us more than a tile sample does. Request an estimate to start, and the master bathroom page covers the larger scope.
What is in the price and what is not
A Wright’s bathroom tile budget includes demolition and disposal, substrate repair and any self-leveling the floor needs, cement backer board or foam panel, the waterproofing membrane with banded corners and pre-formed penetrations, a pre-sloped or site-built pan pitched to the drain, thinset, tile, grout, sealant at every change of plane, transitions at the door, and daily photo updates.
It does not include fixtures beyond what the drawings specify, a radiant mat unless contracted, or repair to framing and subfloor found rotted once the old tile is off. That last one is the common surprise in a bathroom over thirty years old, and it comes to you as a written change order with the cost and the schedule effect before anyone continues. Where the damage extends into the joists, structural work is priced separately and honestly rather than buried in a tile allowance.
