Water is unforgiving. A shower built without the right waterproofing doesn't fail visibly — it fails silently, behind tile, into the subfloor and framing, until the damage forces a complete tear-out. The decisions that determine whether a bathroom renovation lasts 20 years or fails in 5 are made before a single tile is set. This guide covers all of them.
Water is unforgiving. A shower that wasn't waterproofed correctly doesn't leak visibly for months or years. It leaks silently, behind tile, into the subfloor, into the framing, until the damage is severe enough to force a complete tear-out. By that point, a $15,000 shower renovation has become a $30,000 remediation and renovation.
The decisions that determine whether a bathroom renovation lasts 20 years or fails in 5 are made before a single tile is set. Most homeowners don't know what those decisions are. This guide covers all of them.
Fixtures update. Vanity replaces. Mirror, lighting, hardware change. No tile work. No plumbing moves. The bones stay. Two to three weeks. Lowest cost, lowest risk, fastest turnaround.
Everything comes out — tile, vanity, toilet, tub or shower — but plumbing stays where it is. New tile, new fixtures, new everything. Three to six weeks. Requires a licensed plumber and experienced tile setter for shower work.
Plumbing relocates. A tub converts to a custom shower. A curbless shower is added. Walls may move. Six to ten weeks minimum. Requires permits. Requires a licensed general contractor and experienced waterproofing specialist.
A homeowner who decides mid-project they want a curbless shower after demo has already begun has just added significant cost and time. This decision must be made before demo — before the plumber is scheduled, before anything. A curbless shower requires a different subfloor and drain height than a standard shower. It cannot be retrofitted easily.
Every bathroom renovation requires decisions that have dependencies. Making them out of order costs money. Here is the sequence that protects the project.
This is the first question and it drives everything else. If the bathroom being renovated is the only tub in the house, removing it affects resale value in most markets. Decide this before layout, before fixtures, before tile. Everything downstream depends on it.
Prefabricated shower unit, tile shower with a curb, or curbless walk-in shower. Three fundamentally different projects with different costs, timelines, and subfloor requirements. A curbless shower requires the drain to be set lower than the surrounding floor — which may mean modifying the subfloor. This decision must be made before the plumber sets the drain.
Where is the drain? Where is the bench? Where are the niches? Where does the door face? These are structural and plumbing decisions — not finish decisions. The plumber needs drain location before rough-in. The framer needs bench and niche locations before framing. Decide before anyone starts.
Showerhead height. Valve location. Hand shower. Body sprays. Rain head. Each fixture requires a water supply line roughed in at a specific location in the wall. Moving a fixture after rough-in means opening the wall. Confirm every fixture — exact model number and placement — before the plumber does rough-in.
Vanity selection drives drain and supply line rough-in height. A vessel sink sits higher than an undermount. A wall-mounted vanity has different drain requirements than a floor-mounted one. Confirm the vanity before the plumber sets rough-in heights.
Shower floor tile, shower wall tile, accent tile, trim solution, grout color, bathroom floor tile. These are not separate decisions made one at a time. They are a composition — and every element must be considered together before anything is purchased. More on this in the custom shower section below.
Grout color and type affect the entire visual composition of the shower — and the long-term maintenance requirement. The wrong grout on the wrong tile creates maintenance problems that compound over years. Select grout when tile is selected.
Frameless glass shower enclosures are measured and fabricated after tile is complete. But the glass company needs to be selected and the order placed early — frameless glass runs 3 to 6 weeks from measurement to installation. Select the glass style before tile begins. Schedule measurement immediately after grouting.
Bathroom floor tile outside the shower needs to be selected in relationship to the shower floor tile. They don't have to match. They do have to work together. Select both at the same time.
After every tile, fixture, and vanity is confirmed. Bathroom paint needs to be moisture-resistant. Sheen matters — flat paint in a bathroom is a maintenance problem. Wait until everything else is confirmed before choosing.
This is the section most homeowners need most and find least. A custom tile shower is one of the most complex installations in residential construction — not because the individual components are difficult, but because there are so many interdependent decisions, and because water is unforgiving of mistakes. A shower built correctly lasts 20 years. A shower built with shortcuts fails silently until the damage forces a complete tear-out.
The most important decision in a custom shower is the one that will never be visible once the tile is set. Waterproofing is the membrane system applied to the shower walls and floor before tile goes on. It is what keeps water from penetrating behind the tile into the framing and subfloor.
There are several systems — sheet membranes, liquid-applied membranes, foam backer board systems like Schluter KERDI or USG Durock. Modern foam backer systems have largely replaced traditional mortar bed installations — they are more forgiving, more consistent, and easier to inspect before tile goes on.
Ask every contractor: what waterproofing system do you use and why? If they cannot answer that question specifically, they are not the right person to build a shower that will last 20 years.
The shower floor requires small format tile or mosaic tile. This is not a design preference. It is a functional requirement.
A shower floor must slope to the drain — typically a quarter inch per foot in all directions. Large format tile cannot follow that slope without lippage — edges that sit higher than adjacent tiles, creating trip hazards and grout joint failures. Small format tile and mosaic tile can follow the slope naturally because each individual piece is small enough to conform to the pitch.
A homeowner who falls in love with large format tile and wants it on the shower floor needs to understand this before purchasing. Choose the shower floor tile knowing it must be small format or mosaic — then build the design around it.
The shower walls are where most of the visual design happens. Wall tile can be large format. Wall tile can be a statement. But wall tile selection is not a single decision — it is a composition, and every element must be considered together before anything is purchased.
The field tile is the dominant surface — it sets the tone for everything else.
The accent tile is the detail — a liner, a decorative band, a contrasting color or texture. Accent tile placement must be planned before tile is ordered. A horizontal accent band at a specific height requires cutting into the field tile layout. That layout must be planned on paper before it's planned on the wall.
The trim solution — where the tile wall ends — requires a decision before installation begins. This is where the bullnose versus Schluter choice happens.
When a tile wall ends — at the edge of the shower opening, at a niche, at a window — the raw edge needs a finished edge. There are two primary solutions.
Bullnose tile is a tile with one factory-finished glazed edge. It's the traditional solution and looks clean when the field tile has a matching bullnose available. The problem: many modern tile lines — especially large format porcelain — don't have a matching bullnose. Ask the tile supplier before falling in love with a tile.
Schluter strip is a metal or PVC trim profile — available in chrome, brushed nickel, matte black, brass, and other finishes — that creates a finished edge without requiring a bullnose tile. It introduces a metal element that must coordinate with fixture finishes.
The trim decision is made during tile selection — not during installation. A tile setter who shows up without a trim solution planned is improvising at the homeowner's expense.
A shower niche — a recessed shelf built into the wall for shampoo and soap — is one of the most requested and most frequently mishandled shower features.
A niche is built into the wall framing before waterproofing and tile. Its location must be determined before the framer finishes. A niche cannot be added after tile is set without removing tile, cutting into the wall, reframing, re-waterproofing, and re-tiling.
Niche height matters. A niche placed at elbow height for a 5'6" homeowner is in the wrong place for a 6'2" partner. Niche height should be discussed with everyone who will use the shower.
Niche width is constrained by stud spacing. A standard niche fits between two studs — typically 14.5 inches wide in a 16-inch on-center framed wall. A wider niche requires a header and structural consideration.
A shower bench — built-in, tiled, permanent — requires blocking in the wall framing at the bench attachment points before waterproofing. A bench added after tile is set requires cutting into tile, adding blocking, re-waterproofing the penetrations, and re-tiling.
This is a decision made during framing that becomes a much larger problem if missed. If there is any chance a bench will be wanted — now or in the future — install the blocking during framing. It costs almost nothing at that stage.
Grout fills the joints between tiles. It is also the material most homeowners underestimate and most showers fail to maintain properly.
Unsanded grout is used for joints under 1/8 inch. Sanded grout is used for joints 1/8 inch and wider. Epoxy grout is used in high-moisture, high-traffic applications where staining resistance and durability are the priority — it does not require sealing, resists staining, and outlasts cement-based grouts significantly. It is harder to install and more expensive. In a custom shower, it is worth serious consideration.
Grout color is a design decision with maintenance implications. White grout in a shower floor is a maintenance commitment — it will discolor, it requires regular sealing and periodic cleaning. A mid-tone grout close in value to the tile hides wear and requires less maintenance. Neither choice is wrong — but make it knowing what is being chosen.
A curbless walk-in shower — no threshold, floor level continues from the bathroom into the shower — is beautiful, accessible, and makes a bathroom feel larger. It is also significantly more expensive than a curbed shower and must be planned from the very beginning of the project.
A curbless shower requires the shower floor to drain to a central point while sitting at the same level as the bathroom floor outside the shower. This means the shower floor must be built lower than the bathroom floor — which means the subfloor inside the shower footprint must be recessed. In a wood-framed floor, this means cutting into the subfloor and reframing. In a concrete slab, this means cutting the slab.
A homeowner who decides they want a curbless shower after the plumber has already set the drain at standard height has created a significant change order. If a curbless shower is the goal — even a possible goal — say so before anyone starts. The cost to plan for it upfront is a fraction of the cost to retrofit it mid-project.
Frameless glass shower enclosures are measured after tile is complete and grouted — then fabricated custom to the exact dimensions of the finished shower opening — and delivered and installed typically 3 to 6 weeks after measurement.
This means the shower is not usable for 3 to 6 weeks after tile is grouted. Plan for this. Select the glass company and style before tile begins so the measurement appointment can be scheduled immediately after grouting is complete.
Glass thickness matters. 3/8 inch is standard. 1/2 inch is premium and noticeably more substantial. Hardware finish must coordinate with fixture finishes. Door swing direction must be planned — a door that swings into the toilet is a design problem that is obvious in planning and painful in daily use.
A bathroom renovation that goes well — Level 2 with a custom tile shower. Eight to nine weeks. Longer if tile is back-ordered, if glass lead times run long, or if subfloor surprises add scope.
All tile selections confirmed and ordered or in-stock confirmed. Fixtures ordered. Vanity ordered. Glass company selected. Permits pulled if required. Demo date confirmed. Nothing starts until selections are made.
Existing tile, vanity, toilet, tub or shower removed. Subfloor inspected. Any moisture damage or subfloor repair addressed. Framing inspected and modified if needed — niche blocking, bench blocking, any layout changes. This is when surprises are found.
Plumber sets drain at confirmed location and height. Supply lines roughed in at confirmed fixture locations. Electrician adds circuits if required — GFCI outlets, exhaust fan, heated floor thermostat if applicable. Framing inspection if required.
Shower walls and floor prepared. Waterproofing membrane installed and inspected. This step is not rushed. Waterproofing cures before tile begins. This is the most important week of the entire project — and the one most homeowners never see.
Shower floor set first — pre-sloped foam system, then mosaic or small format tile. Shower walls follow. Field tile, accent tile, trim details. Niche tiled. Bench tiled if present. Bathroom floor tile set outside shower. Grout after tile is set and cured.
Glass company measures immediately after grout. Plumber returns to connect supply valves and shower valve trim. Vanity installed. Toilet set. Exhaust fan connected. The clock starts on glass fabrication — typically 3 to 6 weeks.
Glass enclosure installed. Final caulking at all tile-to-fixture transitions. Paint. Hardware installed. Punch list walk. Project complete — or the beginning of the glass wait if lead times run long. Plan for this.
Bathrooms are where water damage hides longest — and where cutting corners costs the most when it's discovered. These risks are preventable. Knowing them before demo is the protection.
When existing shower tile is removed, what's behind it matters enormously. Old greenboard that has been wet for years is compromised. Subfloor under an old shower pan may have soft spots from years of slow leaks. These discoveries happen at demo and cannot be fully known until the wall is open. Budget a contingency. Expect to find something.
Moving a drain in a wood-framed floor is possible and adds cost. Moving a drain in a concrete slab is significantly more expensive — it requires cutting the slab, relocating the drain, and patching the concrete. Know what your floor is before planning a layout change that requires drain relocation.
Every bathroom requires an exhaust fan vented to the exterior — not to the attic, not to a soffit, to the outside. A fan vented to the attic deposits moisture into the attic insulation and framing. This is a code violation in most municipalities. If the existing fan vents to the attic, the renovation is an opportunity to correct it.
Many tile lines — especially imported Italian, Spanish, and Turkish tile — ship from overseas distribution centers. Lead times can run 4 to 8 weeks. Ordering tile the week before demo is a scheduling problem. Confirm tile availability and lead time before setting a demo date.
Electric radiant heated floor systems require a compatible subfloor thickness and a dedicated electrical circuit. They also require a thermostat and a membrane compatible with the heating mat. Confirm compatibility with the tile setter and electrician before ordering.
Bathroom contractors vary widely in their waterproofing knowledge and tile installation experience. These questions reveal who knows what they're doing before work begins.
"Who installs the waterproofing — you or a subcontractor? What system do you use?"
The waterproofing installer is the most important person on a bathroom renovation. Know who they are and what system they use before signing anything. A vague answer is a red flag.
"Have you installed curbless showers before? Can I see one?"
Curbless shower installation requires specific experience with subfloor modification and drain placement. Ask to see a completed project — not just photos — before committing.
"How do you handle the transition between shower tile and the bathroom floor outside the shower?"
This question reveals whether the contractor has thought through the detail work. There is no one right answer — but there should be a specific one. "We figure it out" is not a plan.
"What is your process if you find moisture damage behind the existing tile?"
A contractor who says "we handle it" hasn't thought through it. A contractor who says "we document, photograph, show you, and give you options before proceeding" has a process — and that process protects the homeowner.
"Who sets the tile — you or a subcontractor? How many tile jobs have they done in the last year?"
Tile setting is a skill that improves significantly with volume. Know who is setting the tile and how experienced they are with custom shower work specifically.
"What grout do you recommend for the shower floor and why?"
This question distinguishes contractors who think about long-term performance from ones who think about getting the job done. A contractor who recommends epoxy grout and explains why has thought about the shower in five years — not just the shower today.
"When do you schedule the glass measurement?"
If the contractor doesn't know that glass is measured after grout — not before, not during — they haven't managed enough bathroom renovations. This sequence is fundamental.
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