InstaBidsTypes of shower?
Shower types should match entry needs first: the Access Board describes a 36-inch transfer compartment and a roll-in threshold up to ½ inch, properly beveled. Compare curbed, curbless, tub-shower and steam assemblies separately from controls; EPA’s WaterSense showerheads use no more than 2.0 gpm, regardless of the enclosure you choose. (source: U.S. Access Board)
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Shower layouts: choose access before finishes
| Options | When to consider it | What the installation must resolve |
|---|---|---|
| Curbed tiled shower | Consider a water-retaining curb when stepping over the entry suits the user. | Specify waterproofing behind the tile and 95% wet-area mortar coverage. |
| Curbless tiled shower | Consider a flush-entry design; water containment depends on the floor slope. | Resolve the floor recess, drain and surrounding waterproofing before choosing finishes. |
| Tub-shower combination | Choose an integrated tub-shower assembly when retaining a bathtub is part of the job. | Distinguish the integrated unit from a tiled surround and its waterproofing. |
| Intermittent-use steam shower | Choose an assembly explicitly intended for intermittent steam use. | Name the steam-use assembly; a tile finish alone is not waterproofing. |
| Transfer shower | Plan for seated transfer: the guide sizes the compartment at 36 inches in both directions. | Record seat, controls, grab-bar backing and the 36-inch entry; confirm which accessibility provisions apply. |
| Roll-in shower | Plan for shower-chair entry without transferring to a fixed seat. | Confirm approach clearance and threshold; the Access Board guide allows up to ½ inch, properly beveled. |
Shower components: life and performance are separate decisions
| Options | What the figure actually describes |
|---|---|
| Integrated tub-shower | HUD multifamily planning estimate: 30 years in both Family and Elderly columns; not a prediction for a particular home. |
| Tiled wall finish | HUD multifamily planning estimate: 30 years, Family; 40 years, Elderly. Finish only, not complete shower life. |
| Showerhead flow | EPA WaterSense maximum: 2.0 gpm; EPA contrasts standard heads at 2.5 gpm. Layout does not establish flow. |
| Tile bond coverage | CTEF: 95% mortar coverage in wet shower applications; natural stone also requires 95% across applications. |
Choose the shower for indoor exposure and access
Interior bathing spaces
The captured sources do not rank shower layouts by outdoor climate. Choose water containment, entry geometry and the intended steam exposure; keep the drain and waterproofing specification tied to that assembly.
What is a walk in shower?
Walk-in shower planning starts with the entry: Schluter describes tiled curbs as water barriers and explains that curbless showers depend on floor slope. A tiled walk-in assembly still needs a proper bond: CTEF specifies 95% mortar coverage for wet shower applications.
Compare the entry and water-containment details before choosing the door or tile. The ability to walk through an opening does not answer the separate shower-chair access question addressed by the Access Board.
Source: Chapter 6: Bathing Rooms — shower access guide, read 2026-11-09
Source: Getting the Coverage You Need Under Large Wall Tile, read 2026-11-09
Source: Shower System Installation Handbook, April 2026, read 2026-11-09
What is a roll in shower?
A roll-in shower lets a shower chair or other wheeled mobility aid enter without transfer to a seat. The US Access Board guide permits a threshold up to ½ inch when properly beveled, and describes a flush transition as easier to access.
Use the guide as an accessibility design reference, with the applicable project requirements confirmed separately. Specify the approach, usable entry, controls and seat arrangement together instead of relying on a curbless label alone.
Source: Chapter 6: Bathing Rooms — shower access guide, read 2026-11-09
What is a transfer shower?
A transfer shower is arranged for transfer to a seat rather than shower-chair entry. The US Access Board guide describes absolute 36-inch width and depth, with an entry at least 36 inches wide; the layout keeps supports and controls usable from the seat.
The guide discusses a dwelling-unit exception that permits reinforced walls for a later seat installation. Establish the actual user needs and applicable project standard before choosing the seat and wall construction.
Source: Chapter 6: Bathing Rooms — shower access guide, read 2026-11-09
What is a thermostatic shower?
A thermostatic shower uses temperature-regulating controls; the Moen ioDigital example names thermostatic control, consistency and temperature memory. Its controller has separate temperature and volume knobs, illustrating why control choice is a different decision from a tiled, tub-shower or roll-in enclosure.
Source: How does the ioDigital valve work?, read 2026-11-09
What is a digital shower?
A digital shower separates an electronic controller from the valve. Moen’s ioDigital example uses separate temperature and volume knobs, stored presets and an optional remote with a stated range up to 30 feet. Those are model-specific features, not a specification shared by all digital showers.
Source: How does the ioDigital valve work?, read 2026-11-09
What is a shower pan?
A shower pan is the water-management base beneath the shower finish. Schluter distinguishes the traditional pan liner from its surface-applied waterproofing approach; its KERDI instructions specify a 2-inch membrane overlap and a minimum 24-hour wait after membrane installation before the water test.
Name the exact system in the scope. A curb, tile surface or linear drain does not replace a coordinated waterproofing detail, particularly where a curbless floor must contain water through its slope.
Source: Shower System Installation Handbook, April 2026, read 2026-11-09
Put the entry, valve and hidden assembly in the scope
- State whether the shower is curbed, curbless, integrated tub-shower or an intermittent-use steam assembly.
- For seated transfer, draw the 36-inch compartment and entry from the cited guide; establish which requirements apply.
- For wheeled entry, document threshold treatment, approach clearance and usable controls.
- Identify the valve and its temperature and volume controls separately from the enclosure.
- List the showerhead model and documented flow; EPA WaterSense sets a 2.0 gpm maximum.
- Name the waterproofing system and membrane-to-drain connection, not only the tile finish.
- Include the KERDI 24-hour minimum wait before water testing only when that named system is specified.
- Describe how wet-area tile mortar will achieve 95% coverage.
- For natural stone, include after-use squeegeeing and non-acid care; investigate persistent efflorescence and note any etching.
Sources
- Showerheads and WaterSense Version 1.1 — EPA; undated; read 2026-11-09.
- Chapter 6: Bathing Rooms — shower access guide — U.S. Access Board; undated; read 2026-11-09.
- Getting the Coverage You Need Under Large Wall Tile — Ceramic Tile Education Foundation; undated; read 2026-11-09.
- How does the ioDigital valve work? — Moen; undated; read 2026-11-09.
- Shower System Installation Handbook, April 2026 — Schluter-Systems; 2026-04; read 2026-11-09.
- CNA e-Tool Estimated Useful Life Table — multifamily planning — U.S. Department of Housing and Urban Development; undated; read 2026-11-09.
- Care & Cleaning of Natural Stone — Natural Stone Institute; undated; read 2026-11-09.
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