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Can your bathroom have a curbless shower?
That slim line at the entrance looks simple. The hard part is giving water somewhere to go without creating a step, a leak, or a bathroom floor that stays wet.
Often, but an on-site assessment decides. A curbless shower needs enough height to slope the shower floor toward a drain while meeting the surrounding bathroom floor without a raised curb. The contractor must check the joists or slab, drain position, waterproofing, shower opening and spray pattern. Some rooms can be adapted; others work better with a low threshold.
A flush entry still needs a sloped floor
“Curbless” describes the entrance. It does not mean the entire shower floor is flat. Inside the wet area, the floor must direct water to a drain. With no raised curb to contain a stray stream, the room also needs a sensible opening, showerhead position and plan for splash.
If you are still deciding whether to remove your tub at all, start with our guide to replacing a tub with a walk-in shower. A walk-in shower can have a small threshold; a curbless shower has a flush or nearly flush transition. The distinction changes the work under your feet.
Low threshold
A small step or lip at the entrance. This may fit a room where floor recessing is impractical.
Curbless entry
The floor transitions into the shower without a raised curb. The floor and drain need to support that design.
Wet room
More of the bathroom is built to manage water. It can require a larger waterproofed area and careful placement of other fixtures.
Five things to check before promising a zero-step shower
1. The floor below. A wood-framed floor may offer different options from a concrete slab. Joist direction, depth and condition matter. Cutting framing or concrete is a design and structural decision, not a casual way to make room for a drain.
2. The drain and plumbing path. The location of the existing tub drain does not automatically suit the new shower. A linear drain and a center drain can lead to different floor layouts. The plumbing route beneath the room needs to be checked.
3. The available run to the drain. A longer run needs more vertical fall for a given slope. Where the bathroom floor meets the shower floor matters as much as where the grate sits.
4. The spray and opening. A showerhead aimed at the entry can put water on a floor that was never designed to be wet. Door placement, glass and available space affect the plan.
5. The condition of the old room. Soft flooring, stains or a musty wall deserve investigation during demolition. New tile should not hide an old leak.
Ask to see a section drawing. A top-down layout shows where fixtures go. A section drawing shows how the shower floor meets the bathroom floor and drain. Both matter here.
More distance to the drain means more fall
The U.S. Access Board’s guide to roll-in showers discusses a maximum 1:48 floor slope for those accessible designs. The figures below use that ratio purely to show how distance and height relate. They are not a prescription for your residential shower or a statement of Greensboro code.
Distance ÷ 48 = illustrative fall. A professional must design the actual slope, drain and waterproofing.
Even a small change in height can matter at the bathroom doorway, near the toilet, or where existing flooring must remain. That is why a “same footprint” tub replacement may still need more floor work than expected.
Zero threshold is one piece of an easier shower
A flush entry removes one obstacle. It does not determine whether someone can turn comfortably, reach the controls, stand steadily, or transfer to a seat. The U.S. Access Board explains that ADA standards generally do not apply to individually owned private homes. Its bathing-room guidance can inform a conversation about access, but it should not be advertised as a private home's legal compliance certificate.
A CDC analysis of emergency department bathroom injuries found falls were the most common cause among people 15 and older. That research does not establish that a curbless shower prevents falls. It does support looking beyond the curb: wet-floor grip, stable support, a place to sit if needed, reachable controls and enough room to enter safely.
If the design is for someone with specific mobility needs, consider involving an occupational therapist before fixtures and support points are fixed. Mark grab-bar locations and suitable wall backing before tile goes up.
Tile is the finish. The water plan sits behind it.
Ask how the waterproofing connects the floor, walls, drain and any nearby bathroom floor that might catch spray. A floor drain alone does not protect a subfloor from water at a corner or door opening. The selected system and installation method need to work together.
The EPA’s bathroom remodeling guidance says wet walls should prevent water from entering cavities, leaks should be repaired, and the bathroom fan should exhaust outside rather than into an attic. A curbless plan is a good moment to check the fan while walls or ceiling are open.
For local remodeling examples, see House 2 Home’s bathroom project gallery.
Questions worth asking before tile
- Where does the waterproofing end?
- How does it connect to the drain?
- Where will spray land when the door opens?
- Will the fan exhaust outdoors?
- Who checks the floor before it is covered?
- How will the finished shower be tested?
Check the permit scope before opening the floor
The City of Greensboro’s building permit FAQs identify plumbing installations and changes to drainage, waste and vent systems as permit matters. The city’s residential construction page also describes separate trade permits for electrical, plumbing and mechanical work. Structural changes may involve building review. Ask which permits and inspections apply to the exact design and address before demolition.
Good estimate question: “Will this design change the drain, floor structure, fan or electrical work, and who will obtain the required permits?”
What makes one curbless shower harder than another?
The glass, tile and fixtures are visible on a proposal. The larger swings in scope can come from the work needed to make a flush floor possible: drain relocation, slab or framed-floor changes, repairs found after demolition, waterproofing outside the shower, and layout changes to contain spray. Keep these items separate when you compare estimates.
Our existing article on bathroom remodeling costs in Greensboro gives broader context. A curbless conversion needs its own site-specific quote. You can also read about House 2 Home’s Greensboro bathroom remodeling work.
What homeowners usually ask next
Can you put a curbless shower where a bathtub is now?
Sometimes. The old tub footprint is a useful starting point, but the floor structure, drain route and available height have to support a flush transition and proper water management. Have the room assessed before choosing the final design.
Is a curbless shower the same as a walk-in shower?
No. “Walk-in” broadly describes a shower you enter without using a bathtub. It can still have a low lip. “Curbless” refers specifically to the entrance without a raised curb.
Does a curbless shower guarantee no water on the bathroom floor?
No. Spray direction, enclosure, opening width and floor drainage affect splash. The room should be planned for the way the shower will actually be used.
Do private homes have to follow ADA shower dimensions?
Generally no. U.S. Access Board guidance says the ADA standards do not apply to individually owned private homes in ordinary residential use. A household with mobility needs should plan around the person using the shower and applicable local rules.
Do I need a Greensboro permit for a curbless shower?
That depends on the work. Changes to plumbing drainage and other trade work can require permits; structural changes may require building review. Confirm the proposed scope with Greensboro Engineering and Inspections before work begins.
Sources and further reading
- U.S. Access Board, Bathing Rooms, design guidance for accessible bathing rooms and roll-in showers.
- U.S. Access Board, Using the ADA Standards, scope and private residences.
- CDC, Nonfatal Bathroom Injuries Among Persons Aged 15 Years and Older, historical U.S. emergency department analysis.
- U.S. EPA, Remodeling Your Home and Indoor Air Quality, bathroom moisture and ventilation.
- City of Greensboro, Building Permits FAQs, local trade-permit overview.