Bathroom Renovation
Curbless Shower Installation in Ontario: What Homeowners Should Know
A curbless shower creates a flush transition between the bathroom floor and shower, but that clean look depends on careful planning underneath the tile. Floor height, structure, slope, drainage and waterproofing all have to work together.
Thinking about a curbless shower? We can assess the existing floor system and help determine whether recessing, a ramped transition or a built-up floor makes sense for the room.
What makes a shower curbless?
A curbless shower has no raised threshold at the entry. The finished shower floor transitions into the bathroom floor without a conventional curb.
Because there is no curb to help contain water, the slope, drain location, waterproofing and spray control become especially important.
Three common ways to create the floor height
Schluter describes three main approaches: recessing the shower floor, using a ramp with the shower assembly, or building up the surrounding bathroom floor.
Recessing can create the cleanest flush transition when the structure allows it. A ramp or raised bathroom floor can be useful when lowering the shower area is not practical.
Slope and drainage are the heart of the system
The shower floor has to direct water toward the drain without creating low spots. In a curbless design, this matters even more because there is no curb acting as a physical boundary.
Drain position, tray design and tile layout should be planned together rather than selected independently.
Waterproofing usually extends beyond the visible shower
In a conventional shower, the curb clearly separates wet and dry areas. A curbless shower blurs that boundary, so protection often needs to extend farther into the bathroom.
Schluter recommends protecting floor areas that are subject to water exposure and carefully sealing seams and floor-to-wall transitions as part of the waterproofing system.
Plan spray direction before choosing glass
A curbless shower can drain correctly and still let water escape if the shower head is aimed toward the opening. Fixture position, glass length and the location of the entry should be designed as one system.
This is especially important in smaller bathrooms where the shower opening is close to a vanity, toilet or doorway.
Not every existing floor is equally easy to convert
Joist direction, plumbing, HVAC, floor thickness and the room below can all affect how practical a recessed shower is. Structural members should not be casually cut or modified to gain depth.
The floor assembly should be assessed before promising a fully flush result. Sometimes the best solution is a low-profile transition rather than forcing the floor into a detail it was not built to support.
Check local requirements before construction
Curbless shower details can intersect with plumbing, structural work and accessibility requirements. Local code and permit requirements should be confirmed for the actual scope before work begins.
Manufacturer installation instructions should also be followed for the selected waterproofing and drainage system.
Related services and resources
Frequently asked questions
Can every bathroom be converted to a curbless shower?
Not always in the same way. Joist layout, plumbing, floor height and the room below can determine whether the shower can be recessed or whether another transition method is better.
Does a curbless shower need special waterproofing?
The waterproofing principle is similar to other tiled showers, but protection often extends farther because there is no curb separating wet and dry areas.
Can the existing floor joists simply be cut down?
Structural members should not be modified casually. The floor system needs to be assessed and any structural changes must follow the applicable requirements.
What causes water to escape from a curbless shower?
Common causes include poor slope, inadequate drainage, spray directed toward the opening, or a glass and entry layout that does not contain normal shower spray.