In the world of home design, the functionality of the bathroom has always been our focus. As people's living standards improve, the bathroom is no longer just a place to "solve physiological problems"; it's also a space for us to relax, enjoy, and recharge. So, how to make the bathroom both practical and beautiful has become a top concern for many during home renovation. Many years ago, we heard about the concept of the "four - separation" bathroom: separating the bathtub, sink, toilet, and dry area. The aim was to make the bathroom tidier and the functional areas more distinct through spatial division. However, this concept seems to be losing its luster, replaced by the more flexible and modern - lifestyle - friendly "three - separation plus" model.

What is the "four - separation" bathroom?^[1]

First, let's review the concept of the "four - separation" bathroom. It means strictly separating the various functional areas of the bathroom, mainly including:

Bathroom: This includes the shower and bathtub area, usually separated by a transparent glass partition.

Sink: The place to put toiletries, usually equipped with a mirror, sink, and cabinets.

Toilet: The area for personal hygiene.

Dry area: The area outside the bathroom and toilet, usually used to store clothes, cleaning tools, etc.

The advantages of this layout are obvious. By separating different functional areas, the "territories" in the bathroom are clearly defined. Different spaces stay clean and tidy, and the cross - influence of water vapor is reduced. For most families, the "four - separation" design often provides good ventilation and is relatively easy to clean.

However, as time goes by, the drawbacks of this design are becoming more and more obvious. First is the issue of space. In many families, especially those in small - sized apartments, the bathroom space is limited. Adopting the "four - separation" design will undoubtedly waste a lot of precious space. Second, the "transitions" between the four areas may make the space seem fragmented and oppressive, lacking flexibility and openness. Especially in the modern fast - paced lifestyle, many people prefer a more simplified and convenient function.

Why is the "four - separation" design becoming obsolete?

Lack of space: For small urban apartments, the bathroom space is already limited. Trying to separate the bathtub, sink, toilet, and dry area may make the bathroom even smaller and add unnecessary walls and partitions, further squeezing the usable space. As a result, instead of making better use of the space, it makes it seem crowded.

Lack of flexibility: The "four - separation" design is often very fixed and traditional, while modern people pursue a more flexible spatial layout. For example, many young families prefer the "wet - dry separation" rather than the complete four - separation to better handle unexpected situations in life. For instance, during the morning rush hour, if the sink and bathroom are separated, there may be a "fight" for public space, especially when the whole family is in a hurry.

High maintenance cost: In the "four - separation" layout, each functional area needs independent facilities, which increases the construction and maintenance costs. For example, the four areas require different materials, ventilation, and drainage systems, which invisibly increase the difficulty of design and construction. Moreover, when a functional area breaks down, it needs to be repaired separately, resulting in low overall efficiency.

What is the "three - separation plus" design? And why is it more popular?

Facing the limitations of the "four - separation" design, more and more families are inclined to adopt the "three - separation plus" design. This design concept no longer emphasizes the strict division of functional areas but focuses more on the convenience in life and the fluidity of space. Simply put, the three - separation design mainly means separating the bathroom and the toilet while keeping the sink and dry area open. Its core ideas are:

Separate the bathroom and the toilet to ensure personal privacy.Separate the wet and dry areas to prevent water vapor from the shower from affecting other areas.Integrate the sink and dry area to reduce unnecessary space waste.

Specifically, the innovation of the "three - separation plus" model lies in not being limited to the traditional fixed area division. Instead, it uses some smart devices, flexible designs, and efficient layouts to improve the utilization efficiency of the bathroom. For example:

-Smart bathroom devices: Modern smart toilets, smart mirrors, electronic faucets, etc. can save space and enhance the user experience. Smart toilets can have built - in functions such as deodorization, heating, and automatic cleaning. The faucets at the sink can automatically sense and adjust the water flow, reducing manual operation and making life more convenient.

-Reasonable wet - dry separation design: Traditional bathroom area separation often makes the overall layout seem fragmented. The modern "three - separation plus" design uses smart drainage systems, reasonable partitions, and glass designs to keep a certain distance between the bathroom and other functional areas, avoiding cross - infection of water vapor while preventing excessive separation and making the space more transparent.

-Multi - functional space: More and more bathroom designs combine the "dry area" and the "washing area" through embedded washing machines, laundry sinks, etc. This not only improves space utilization but also avoids space waste. In this way, the bathroom can be more than just a place for washing and using the toilet; it can also serve as an auxiliary functional space.

-Modular design: Modern families attach more and more importance to modular furniture and adjustable designs. For example, the area under the sink can be designed as a hidden storage space, the bathroom wall can be equipped with flexible storage racks, and the area under the bathtub can also have additional storage space. These designs make the bathroom space more free and efficient.

How can you set up a “three-separation plus” bathroom design?

If you're thinking about renovating your bathroom, the following design tips might help:

Wet - dry separation

You don't have to use partitions to separate different areas. Transparent glass partitions, smart drainage systems, etc. can effectively achieve wet - dry separation. You can choose an open - style shower or use a glass partition to separate the bathing area from the sink. This way, you avoid too many walls and make the bathroom look more transparent.

Choose appropriate storage space

Storage space in the bathroom is very important. You can choose some hidden storage spaces to store daily necessities and avoid clutter. For example, you can put a big storage cabinet under the sink or add some useful hanging racks and shelves on the bathroom wall.

Keep the design stylish while still being practical

Modern bathroom design pays more and more attention to the combination of human - centeredness and artistry. Besides functionality, design sense can't be ignored. For example, you can choose simple and modern ceramic tiles, match them with warm - toned lighting, or select some artistic wallpapers and decorative paintings to enhance the overall atmosphere of the bathroom.

Optimize the flow layout

A reasonable flow layout can make the bathroom more efficient. For example, you can adjust the distances between the sink, bathtub, and toilet according to the usage habits of family members to ensure maximum convenience for everyone.

The "three - separation plus" design has become the new trend in bathroom design. Through flexible space allocation, the use of smart devices, and modular design, it not only improves the utilization efficiency of the bathroom space but also makes life more convenient and comfortable.

Source :

[1]https://www.reddit.com/r/UXDesign/comments/1hpx9hl/future_of_ux_design_field/