The barrier nobody wants to see
There is an element in the bathroom that serves an indispensable function yet, from a design perspective, is almost always a problem: the shower screen. Aluminium frames, lower tracks that accumulate limescale, profiles that cut the sightline, silicone joints that age badly. No matter how expensive it is — the conventional screen is the greatest visual interruption in any bathroom.
When you remove it, something happens that can only be understood by seeing it. The space breathes. Light flows without obstruction. The bathroom ceases to be a collection of compartments and becomes a single, clean, continuous volume. It is the same effect produced by knocking down an unnecessary partition wall in a living room, but compressed into three or four square metres — and that is why its impact is so intense.
This is not a new idea. In Japan, bathing culture has worked without rigid separations between the washing zone and the immersion zone for centuries. The concept of the ofuro — the traditional Japanese bath — is founded on a fully wet space where water is part of the environment, not confined within it. Contemporary bathrooms in Tokyo and Kyoto follow this philosophy with modern materials and technology, and the result is a serenity that Western bathrooms, compartmentalised to the extreme, rarely achieve.
The question is not whether it can be done. It is how to do it well. Because removing the screen without resolving drainage, slope and waterproofing is a recipe for disaster. Let us look at what you need to know.
How a screenless bathroom works
When there is no physical barrier to contain the water, all the engineering must work at floor level. It is a paradigm shift: instead of confining water with glass walls, you guide it with geometry.
Slope is the key. A shower floor without a screen needs a slope of 1.5% to 2% toward the drain point or line. This means that for every metre of distance, the floor drops between 1.5 and 2 centimetres. It sounds slight, but it is enough for water to flow naturally toward the drain without escaping to the dry zone. Calculating these slopes requires millimetric precision, and it is work that must be done during the masonry phase, not after.
Properly dimensioned drainage. The channel or drain must be capable of evacuating the full flow from the shower head. A standard 20 cm head produces between 12 and 15 litres per minute. A 30 cm rain-type head can reach 20 litres per minute without a flow limiter. The channel must evacuate that flow rate plus a safety margin. Quality linear channels — such as those from Grohe — are dimensioned for flow rates of 30-50 l/min, which provides ample margin.
Total waterproofing. Without a screen, water can reach areas of the floor and walls that would never get wet in a conventional bathroom. This demands continuous waterproofing beneath the finish that covers not only the shower zone but also a generous perimeter around it. Polyethylene membranes or liquid membranes are used to create a watertight barrier beneath the floor. It is invisible once finished, but it is the most critical piece of the entire system.
The Spanish Technical Building Code (CTE) requires that wet-zone floors meet a minimum slip-resistance coefficient (class 2 for interior wet zones). This conditions the choice of materials and finishes, and is a point that must never be overlooked.
3 solutions for separating without enclosing
There is no single way to do away with the screen. In our experience, there are three main approaches, each with its advantages and its ideal context.
Partial fixed glass panel
This is the most accessible solution and the one that best balances pragmatism and aesthetics. A fixed panel of tempered glass (8-10 mm thick), frameless, doorless, without a lower track. It may cover half the width of the shower or two-thirds, always leaving a generous opening for entering and exiting without restriction.
The fixed panel retains direct splashes from the shower head but does not enclose the space. Visually, a transparent fixed glass panel without framing is almost invisible — the eye passes through it without registering it as a barrier. It is the option we most recommend at Azulia for bathrooms between 4 and 6 square metres, and it is the basis of our Walk-in Invisible design.
The ideal height is 200 cm (floor-to-ceiling produces an even cleaner effect), and the glass should carry an anti-limescale treatment to maintain transparency. Without that treatment, in Valencia — with the water we have, which is far from soft — the glass hazes over in a matter of weeks.
Subtle level change
Instead of a vertical barrier, a horizontal one: a step of 3-5 centimetres that delineates the shower zone from the rest of the bathroom. It is sufficient to contain water that might overflow the slope, and at the same time it visually defines the wet zone without interrupting the view.
It is an elegant solution for continuous-floor bathrooms where a change of material between zones is undesirable. The step can be finished with the same material as the floor, making it an almost imperceptible detail. In neighbourhoods such as Benimaclet or Campanar, where many apartments have square-plan bathrooms between 3.5 and 5 square metres, this level change works especially well because it sacrifices not a single centimetre of visual space.
The limitation is obvious: the step compromises floor-level accessibility. For people with reduced mobility or for projects with universal design criteria, the fixed panel or the full wet room are better options.
Full wet room
The radical solution. The entire bathroom is treated as a wet zone. Floor, walls, ceiling — the entire envelope is waterproofed. The whole floor slopes toward one or several drain points. There is no distinction between shower zone and dry zone because, potentially, the entire bathroom can get wet.
This is the concept that defines our Compact Wet Room design, and it is particularly effective in small bathrooms where separating zones is nearly impossible. It is also the option most coherent with the aesthetics of continuous micro-cement, where the total absence of joints and transitions creates a monolithic space.
The wet room demands the most rigorous waterproofing and the best-dimensioned drainage. But when well executed, the result has a visual purity that no other configuration can match.
Drainage: the invisible hero
If there is one element upon which everything in a screenless bathroom depends, it is the drainage system. It may sound unglamorous, but it is the piece that makes the magic possible. A poorly dimensioned or poorly positioned drain ruins any design, however beautiful the finish.
Linear channel. This is the premium option and the one that works best with continuous floors. It is installed along one side of the shower (generally against the wall) or at the boundary between the wet and dry zones. The floor slope runs toward it in a single plane, which enormously simplifies execution. Brands such as Geberit, ACO and Grohe itself offer channels with stainless-steel grates, tile-covered grates (invisible) or minimalist line grates.
The covered channel — where the grate is a piece of the same floor material — is our favourite. It disappears. You can only sense a shadow line on the floor. The water slips in and is gone. Clean, silent, invisible.
Point drain. The classic drain: a central or off-centre point toward which the slopes converge. It is more economical and simpler to install, but it requires the floor to slope in four directions (toward the point), which generates more complex floor geometry. With large-format porcelain tiles, those four slope planes can produce awkward cuts and irregular joints.
In screenless bathrooms, the linear channel is almost always the best investment. It simplifies floor construction, improves evacuation and allows a cleaner visual finish. It is one of those decisions where spending a little more produces a disproportionately better result.
Materials that help
The choice of materials is not independent of the decision to eliminate the screen. Some finishes facilitate execution; others complicate it.
Continuous micro-cement. It is the natural ally of the screenless bathroom. Without joints, without transitions, with the ability to integrate the slope organically within the material’s own mass. Micro-cement allows you to create a floor that flows from the bathroom entrance to the drain point without any visual interruption. We discuss this material in depth in our guide to micro-cement in the bathroom.
Large-format porcelain. Pieces of 60 x 120 or 120 x 120 cm reduce grout lines to a minimum and create a visually continuous surface. For the sloped shower zone, large-format pieces may require specific cuts, but a skilled installer resolves this with craft. The key is to choose porcelain with the appropriate slip resistance (class C3 minimum in the wet zone per CTE).
Mosaic in the wet zone. It may seem contradictory — mosaic is the opposite of large format — but it has an extraordinary technical virtue: its small pieces adapt to any slope without the need for complicated cuts. A shower floor with a 2% slope finished in 5 x 5 cm mosaic is executed with far greater ease than the same floor with 60 x 60 pieces. Moreover, the numerous grout lines of mosaic provide natural non-slip grip. It is a solution we have used in several projects and one that combines surprisingly well with large-format walls.
Anti-slip treatment. Whatever the chosen material, the wet zone requires an adequate slip-resistance coefficient. Chemical treatments exist that can be applied to porcelain or natural stone to increase grip without altering the visual appearance. This is a step that must never be omitted in a screenless bathroom, where water may spread further than usual.
When NOT to eliminate the screen
It would be dishonest to present the screenless bathroom as a universal solution. It is not. There are situations where maintaining some form of enclosure — even a minimal one — is the wisest decision.
Bathrooms shared by the whole family. When the bathroom is used by adults and small children who turn the shower into a swimming pool, water will escape any system of slopes. A partial fixed panel may not be enough, and a wet room requires that all furnishings and accessories be prepared for moisture. If the vanity is a metre and a half from the shower and there is no way to distance them further, perhaps a minimalist screen is the most sensible option.
Very narrow bathrooms. If the bathroom’s width does not allow the shower head to be more than 60-70 cm from the dry zone, water will splash beyond the shower zone with certainty. In these cases, a floor-to-ceiling fixed glass panel is almost essential. The good news is that a frameless fixed panel, in a narrow bathroom, is barely perceptible visually.
Bathrooms with insufficient ventilation. Without a screen, moisture disperses throughout the entire bathroom instead of concentrating in an enclosed space. If the bathroom has no window or powerful extractor, this additional humidity can generate condensation and mould problems in areas that were previously dry. Before eliminating the screen, it is essential to ensure that ventilation can manage the extra moisture.
Rental properties or homes for sale. Not everyone appreciates a wet room. For the general market, a well-executed conventional shower may be more versatile than a screenless design that requires a user who understands how it works.
Frequently asked questions
Does the entire bathroom get wet without a screen?
Not necessarily. With a correct slope of 1.5-2% toward the channel and a well-positioned shower head, water is contained within the shower zone. Splashes may reach about 30-40 cm beyond the direct shower area, but with a waterproofed floor and the right slope, that water drains quickly. A partial fixed glass panel further reduces splashing while maintaining the sense of spaciousness.
How much does a screenless bathroom with a linear channel cost?
The additional cost of designing a screenless bathroom compared to one with a conventional screen is concentrated in three areas: the linear channel (300-800 euros depending on model and length), the extended waterproofing (400-700 euros additional) and the execution of floor slopes (specialist labour). In total, the surcharge is typically 1,200 to 2,500 euros above a conventional shower. The screen you save (400-1,200 euros) partially offsets that difference. You can estimate the cost of your project with our calculator.
Can a screenless bathroom be created in an older apartment?
Yes, but it requires intervention at floor level. In older Valencia apartments, the slab usually has a levelling layer that allows the necessary slopes to be created without compromising the floor height relative to the corridor. What cannot be done is simply removing the screen from an existing shower — the floor must be rebuilt with the correct slopes and waterproofing. It is a full bathroom renovation, not a partial modification.
What maintenance does a linear channel require?
The linear channel requires monthly cleaning of the grate and trap to remove soap residue and hair that may obstruct drainage. It is as simple as lifting the grate and cleaning with hot water and a brush. Quality channels have removable traps that facilitate this operation. In hard-water areas like Valencia, a mild descaling treatment every two to three months prevents limescale build-up inside the channel.
Designing a bathroom without a visible screen is designing with the same logic a good architect uses when eliminating unnecessary doors: because every barrier that disappears is space gained and light set free. If this approach resonates with you, we invite you to explore our Seamless Microcement design, where continuity is the guiding principle, or to visit us at our Valencia studio to see these materials and solutions in person. Some things need to be touched to be understood.