Can You Build a Curbless Shower on a Concrete Slab in Florida?
A curbless shower can be possible on a concrete slab, but removing the curb isn't the whole job. The shower needs a drainage slope, waterproofing and a workable transition to the bathroom floor.
If your Tampa Bay or Sarasota home has a slab foundation, those details deserve attention before you choose tile and glass. Existing floor heights and the slab's construction can change the scope substantially.
Start by asking whether a flush entry works in your bathroom. Then compare it with a low-threshold shower if the construction tradeoffs are too great.
Key Takeaways
- A curbless shower has no raised curb at its entry. A walk-in shower may still have one.
- Floor height, drainage and waterproofing must be planned together.
- A concrete slab shouldn't be cut or recessed without assessing its construction and hidden services.
- Raising the bathroom floor may create another transition at the doorway.
- An easy-entry shower still needs thoughtful space, controls, flooring and support features.
Curbless, low-threshold and walk-in aren't interchangeable
Use the entry detail, rather than a marketing label, when comparing designs.
| Design | What it means for planning |
|---|---|
| Curbless or zero-entry | No raised curb at the shower opening; the floor assembly still needs drainage slope |
| Low-threshold | A smaller raised entry that may offer a practical compromise |
| Walk-in | A general description that doesn't confirm curb height, door arrangement or accessibility |
Ask for the proposed entry height on the drawing. A photo alone may hide a step, a floor transition or construction beneath the tile.
Why the concrete slab changes the conversation
The shower floor needs room for its finished surface, supporting layers, waterproofing and slope toward the drain. The adjacent bathroom floor has its own height.
Before committing to a design, your remodeling team should assess the existing shower area, drain location and floor transitions. Confirm what is known about the slab and what requires further investigation.
Don't assume every slab can be lowered. Reinforcement, post-tensioning and concealed utilities may affect what work is appropriate. Structural changes require qualified assessment, not an improvised cut.
Schluter's curbless planning guidance discusses recessing the shower floor, using a ramp or raising adjacent flooring. Which approach fits depends on the structure and the complete assembly.
Three approaches to discuss with your remodeler
1. A recessed shower area
Where suitable construction allows it, a recessed area can provide space for the shower assembly. The goal is to meet the adjoining finished floor cleanly.
The homeowner decision is whether the resulting scope, disruption and cost make sense. Ask what investigation is needed before the contractor can confirm feasibility.
2. A raised bathroom floor or transition
Building up the bathroom floor can be an alternative when lowering the shower area isn't appropriate. However, the height change doesn't simply disappear.
Review the doorway, adjoining flooring and other fixtures together. Schluter notes that its raised-floor approach can require a threshold at the bathroom entrance. That tradeoff matters if your priority is an uninterrupted route into the room.
3. A low-threshold alternative
If a fully flush entry requires work you don't want to undertake, compare a low-threshold design. Discuss the actual step height and how you would use it.
A simpler construction approach may leave room in the budget for a better layout, useful storage or a more suitable enclosure. Compare complete proposals before deciding.
Where does the water go without a curb?
A curbless shower needs more than an attractive drain. The floor slope, drain, waterproofing and enclosure must work together.
Schluter's system overview explains that protection must account for water exposure beyond the shower opening. Tile and grout aren't a substitute for a properly specified waterproof assembly.
Discuss where the showerhead points, how the glass contains spray and what happens near the opening. A completely open shower isn't automatically the right fit for a compact room.
Before signing off, ask:
- Where is the intended wet area, including outside the shower opening?
- How will the chosen waterproofing system connect with the drain?
- What enclosure arrangement is proposed to limit splash?
- Which preparation, inspections and checks are included in the scope?
- Who coordinates the tile, plumbing and glass details?
These are planning questions for your contractor, not instructions to build the assembly yourself.
Plan access around the person using the shower
Removing a curb addresses one obstacle. It doesn't automatically make a bathroom accessible or establish compliance with an accessibility standard.
Consider the route from the doorway to the shower, space beside a seat, the reach to the controls and clearance around glass. Discuss any mobility equipment and the needs of the person using it.
If support bars may be useful now or later, raise that question before walls are closed. Ask about appropriate backing and placement. For flooring, confirm that the selected product is suitable for the intended wet area.
A real St. Petersburg bathroom example
Our wood and brushed gold bathroom project shows a glass enclosure, built-in bench and coordinated wall and floor tile.
Those visible choices can inform your own discussion about seating, storage and finishes. The photograph doesn't document the hidden slab assembly or confirm a zero-height entry. Your bathroom needs its own assessment.
What affects the price of a curbless shower?
Compare the complete bathroom scope, not just the price of a drain or shower tray. Important variables include:
- Investigation and any approved work affecting the slab.
- Drainage changes and related plumbing work.
- Shower and bathroom floor preparation.
- Waterproofing, tile selection and installation details.
- Glass, seating, niches, fixtures and support features.
- Work at the bathroom doorway and adjoining finishes.
Ask the proposal to distinguish confirmed work from allowances and unresolved conditions. There isn't a responsible universal price without knowing the room.
If you're replacing a bathtub, our tub-to-shower planning guide covers the broader layout decisions. A conversion and a curbless assembly are related choices, but they're not the same scope.
Questions to settle before demolition
- Is the objective a flush entry, a lower step, easier cleaning or a different layout?
- What do we know about the slab and the existing drain?
- How will the finished shower and bathroom floor heights meet?
- Will the doorway or adjoining room need work?
- What remains subject to investigation, permit review or design approval?
- Have the enclosure, fixtures, tile and waterproofing details been coordinated?
Confirm applicable permit requirements for your address and planned work with the responsible building department. Don't treat a change to finishes as equivalent to a change affecting drainage or structure.
Discuss your bathroom before choosing the entry detail
TGA works with homeowners planning bathroom remodels in St. Petersburg and Sarasota.
Bring bathroom photos, your priorities and any existing plans to the first conversation. We start with a home visit and measurements for your TGA 5-Star Estimate. Design and material selections follow proposal approval, with your signoff before construction.
Request a bathroom remodeling consultation to compare the options that fit your home.