The moment the bathroom loses its boundaries

You step barefoot into your bathroom first thing in the morning. There is no door to open, no screen to slide. Just a fluid step into the shower zone, where a 30-centimetre rain head begins to pour hot water in silence. The steam rises. The glass softly mists on one side. And you are there, in a space that breathes, without barriers, without the claustrophobic feeling of a cubicle.

That is a walk-in shower. Once you have experienced it, returning to a conventional screen feels like going back a decade.

We are not exaggerating. The open shower with fixed glass is the most requested element in the projects we develop at our Valencia studio. When we eliminate the door, we eliminate the heaviest visual barrier in the bathroom. And the space, quite simply, is transformed.

What exactly is a walk-in shower

It is worth clarifying the concept, because the term is used with a certain looseness. A walk-in shower is an open shower zone with unrestricted access — no door, no slider, no pivot — bounded by a fixed glass panel and by the design of the space itself.

Its defining characteristics:

  • Open access: you enter by walking in, without moving anything. Hence the name walk-in.
  • Fixed glass: a single panel of tempered glass (typically 8 to 10 millimetres thick) anchored to the ceiling or wall, without hinges or tracks.
  • No profiles or minimal profiles: the hardware is discreet or entirely invisible. The glass appears to float.
  • Continuous floor or minimal step: ideally, the floor flows from the bathroom into the shower without interruption, with a controlled slope towards the drain. If there is a step, it does not exceed 2–3 centimetres.

The difference from a conventional screen is architectural: a screen divides the space into inside and outside; a walk-in integrates the shower into the bathroom’s total volume. More generous, more luminous, visually cleaner. For anyone seeking an organic minimalist design, the walk-in is virtually a prerequisite.

Minimum and optimal dimensions

This is where many projects falter. The walk-in shower needs space — not as much as one might think, but a non-negotiable minimum.

The key figures:

  • Access width: minimum 90 cm, optimal 120 cm or more. Below 90, water splashes out and the sense of openness is lost.
  • Depth of the shower zone: at least 100 cm from the glass to the tap wall. Ideally: 120–140 cm, which allows showering without water bouncing back towards the open access.
  • Fixed glass height: between 190 and 220 cm. A 200–210 cm panel in a 250 cm ceiling leaves an upper strip that facilitates natural ventilation. If the glass reaches the top, you will need mechanical humidity extraction.
  • Floor slope: Spanish regulations (CTE DB-HS) require a minimum of 1% towards the drain. We recommend between 1.5% and 2% — sufficient to drain the water without the slope being perceptible underfoot.

A functional standard walk-in has these proportions: shower zone of 120 x 120 cm, open access of 90–120 cm, fixed glass of 80–100 cm wide by 200 cm tall, linear drain at the end opposite the access. Every project has its particularities, and at our studio we adjust to the centimetre based on the bathroom’s actual geometry.

The fixed glass: the silent protagonist

If the walk-in shower is the queen of the contemporary bathroom, the fixed glass panel is its crown. A single pane of glass that changes everything without making a sound.

Thicknesses: 8 mm, 10 mm and 12 mm

  • 8 mm: the most common standard. Sufficient for panels up to 100 cm wide and 200 cm tall. Moderate weight (20 kg/m²). The most balanced cost-to-quality ratio.
  • 10 mm: our recommendation for the majority of projects. Greater rigidity, less vibration to the touch, a more substantial visual presence. Weight: 25 kg/m². 15–20% more expensive than 8 mm, but the perceived quality difference is notable.
  • 12 mm: for large-dimension panels (over 120 cm wide) or floor-to-ceiling installations without an upper profile. Considerable weight (30 kg/m²), requiring reinforced fixings. The result: spectacular.

Tempered vs laminated

Tempered glass (standard EN 12150) is the norm: resistance four to five times greater than conventional glass and, in the event of breakage, it fragments into rounded pieces without sharp edges. Laminated glass (standard EN 14449) bonds two layers with a PVB interlayer, so fragments remain adhered in the event of impact. It is the option we specify in homes with small children or elderly residents, though it costs 40–60% more.

Anti-limescale treatments

In hard-water areas such as much of the Comunitat Valenciana, untreated glass accumulates limescale marks within weeks. Hydrophobic nano-coatings create an invisible layer that repels water and hinders mineral adhesion. They last between three and five years. This is not a dispensable extra: it is a necessity.

Hardware: from minimal to invisible

  • Wall profile: vertical aluminium or stainless steel profile. The safest and most economical. Available in chrome, matt black, brushed gold or nickel.
  • Point clamps: two or three metal fittings at discreet points. A cleaner look, a feeling of lightness.
  • Concealed anchorage: the glass is embedded in a channel routed into the wall. It appears to emerge from the wall without any support. This is the solution in our Walk-in Invisible design — it requires forward planning during construction, but the result is ethereal.

The continuous floor: how it is achieved

A walk-in loses half its appeal if the shower tray is a separate piece. The objective is total continuity: making it impossible to tell where the bathroom ends and the shower begins.

Microcement

The most radical option and the most coherent with the walk-in concept. A continuous layer of microcement covers floor, walls and shower zone without a single joint. The drain is integrated flush. The slope is created during application.

Advantages: total continuity, unlimited colour palette, minimal thickness (2–3 mm), compatible with underfloor heating. Disadvantages: requires a certified applicator, periodic sealing every 2–5 years, sensitive to aggressive cleaning products.

Large-format porcelain with linear channel

Pieces of 120 x 120 cm or 120 x 260 cm that minimise joints until they are almost imperceptible. Drainage is resolved with a linear drain channel flush with the floor. Joints of just 1.5–2 mm are grouted with impervious epoxy mortar.

Advantages: enormous variety of finishes, extreme durability, straightforward maintenance. Disadvantages: requires precise cuts for the slope and an experienced installer.

Medium format with slope

The most accessible option. 60 x 60 cm pieces laid with a slope towards a drain. Contained cost and simple repairs, but more visible joints and a less refined appearance.

For projects where visual continuity is the priority, our recommendation is microcement or large-format porcelain, embodied in the Seamless Microcement concept.

Walk-in in small bathrooms: is it possible?

The short answer: yes, but with caveats.

Our experience with renovations in the Ensanche, in Ruzafa and especially in the Cabanyal — where bathrooms of 3.5 to 5 square metres are the norm in original homes — has taught us that the walk-in starts to work well from 6 square metres of total area. Below that, the risk of water reaching unintended areas is high, and the sensation of openness becomes a sensation that everything is wet.

That said, there are intelligent solutions for compact bathrooms:

  • Half-height glass (120–140 cm): protects against splashes without the visual weight of a floor-to-ceiling panel. An honest compromise between functionality and aesthetics.
  • Strategic placement: positioning the shower at the end opposite the entrance door, preferably in a corner, minimises splashing towards the dry zone.
  • Continuous floor with generous slope (2%): drains water before it travels far. Combined with a high-capacity linear channel (minimum 48 litres/minute), it is highly effective.
  • Centred rain head: a rain showerhead from Hansgrohe or Grohe mounted directly above the shower zone directs water downward, not sideways.

What we do not recommend: installing a walk-in in bathrooms under 4.5 m² without powerful mechanical ventilation. Humidity without extraction generates mould and turns the bathroom into an involuntary sauna. If you have doubts about whether your bathroom can accommodate a walk-in, our calculator gives you an initial steer in under two minutes.

Inspiration: 4 walk-in styles

The walk-in shower is a canvas. The style is yours (or ours together).

Minimal: white, glass and silence

Rectified white porcelain in large format. Continuous floor in pearl grey. 10 mm fixed glass with concealed anchorage. Concealed taps in matt white. Flush linear channel, invisible. The shower disappears into the bathroom. The bathroom disappears into the light. This is the walk-in for those who understand that absence is the purest form of presence.

Industrial: concrete, black metal and character

Graphite-toned microcement on floor and walls. Fixed glass with matt black steel profiles. Exposed industrial-style taps in black. Circular brushed stainless steel drain. A walk-in with attitude, for bathrooms that make no apology for existing. It works extraordinarily well in rehabilitated lofts and in the storied flats of central Valencia.

Warm: timber, stone and nature

Limestone-effect porcelain on the floor. Oak wood-effect accent wall. Fixed glass with brushed brass clamps. Taps in rose gold or aged gold. Shower niche clad in the same stone as the floor. A walk-in that recalls a Japanese onsen or an outdoor shower at a Mediterranean villa.

Luxury: marble, brass and contained drama

Calacatta or Statuario marble in large format, bookmatched if the budget allows. 12 mm fixed glass with concealed anchorage. Taps in natural brushed brass. Linear channel with bespoke brass grating. This is the walk-in that graces the covers of AD and Wallpaper. It is not for every project, but when executed well it is simply unforgettable.

Frequently asked questions

Does the water not splash outside the shower?

With the correct dimensions (minimum 90 cm access, 100 cm depth), a centred rain head and adequate slope, splashing is limited to the immediate access area and dries within minutes. Across more than 200 walk-in projects, complaints have been virtually non-existent when these measurements are respected.

Can I install a walk-in if I rent the flat?

A walk-in with an ultra-slim tray and screwed-in glass is relatively reversible. One with a continuous floor and linear channel involves plumbing work that requires the landlord’s permission. If you rent, consult before investing.

What maintenance does the fixed glass need?

With anti-limescale treatment, it is enough to run a silicone squeegee after each use (30 seconds) and clean with a damp cloth once a week. Without treatment, the necessary cleaning increases considerably in hard-water areas.

Is a walk-in more expensive than a conventional screen?

The fixed glass itself is usually cheaper than a screen with doors (fewer fittings, fewer mechanisms). But the total cost can be higher because it demands a continuous floor or flush tray, a linear drain and reinforced waterproofing. The total investment ranges from €2,500 to €6,000, depending on materials and dimensions, not including cladding.

A space to be lived, not merely used

The walk-in shower is not a trend. It is a natural evolution of the contemporary bathroom towards spaces that are more open, more honest and more integrated into the architecture of the home. When we eliminate the door, we do not merely gain visual centimetres: we gain a different experience. The everyday act of showering ceases to be a transaction in a cubicle of aluminium and plastic.

At our Valencia studio we have spent years perfecting the art of the open shower. Our Walk-in Invisible design encapsulates everything we have learned: glass without visible profiles, continuous floor, and the sensation that the water simply appears in the space.

If you are considering taking the step — quite literally — towards the open shower, we would be delighted to hear from you.