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An Ambiguous Zone Connecting Interior and Exterior.
The doma is a rich, ambiguous space that is neither fully exterior nor interior. It allows for activities without removing shoes, making it versatile for tasks such as gardening, bicycle maintenance, and DIY projects. By incorporating the traditional Japanese doma concept into modern residences, the scope of daily living is expanded.
Spacious Earthen Floor Area Extending from the Entrance.
By extending the earthen floor beyond the entrance to the living room and kitchen, a dynamic spatial experience is created. This design enhances practicality by allowing bicycles and strollers to be pushed directly inside and providing a temporary storage area for shopping bags. The earthen floor becomes an integral part of the daily circulation, resulting in a flexible and functional living environment.
Flooring Materials: Mortar and Tiles.
For earthen floors, hard and durable materials such as mortar finishes, tile installations, or exposed aggregate surfaces are suitable. The atmosphere can vary significantly depending on the color and texture, so select materials that harmonize with the overall design of the residence. The choice of material ultimately defines the character of the earthen floor.
Seating Area Utilizing Level Differences.
By incorporating a level difference between the earthen floor and the interior floor, the stepped section serves as a seating area. Occupants can sit on the interior side to put on shoes or sit on the earthen floor side to enjoy views of the garden, enabling versatile usage. The level difference creates a distinct place within the space.
Compatibility with Wood-Burning Stoves.
Installing a wood-burning stove on an earthen floor allows you to leverage the floor's fire-resistant properties. Tasks such as carrying in firewood and cleaning out ashes can be performed on the earthen floor without concern for dirt or damage. The lifestyle centered around the warmth of the fire harmonizes exceptionally well with the earthen floor.
Storage for Bicycles and Motorcycles.
With a dirt floor area, bicycles and motorcycles can be stored indoors. This eliminates concerns about theft and provides protection from rain and wind. Maintenance work can also be performed on the dirt floor, allowing the space to function as an area to enjoy your hobby. The dirt floor thus serves as a garage for your prized vehicles.
Earthen Floor as a Workspace.
For activities that involve dirt and mess, such as DIY projects, pottery, and gardening, an earthen floor provides an ideal workspace. It allows for the use of water and tolerates floor soiling without concern, enabling full concentration on the task at hand. By installing workbenches and shelving, the space can also function effectively as a professional-grade atelier.
Ideal for Living with Pets.
For households with dogs, the earthen floor area allows for wiping paws after walks and storing pet supplies. This space provides a comfortable environment for pets, functioning as an intermediate zone between the interior and exterior. The earthen floor plays a significant role in harmonious living with pets.
Thermal Insulation, Airtightness, and Thermal Environment.
Since the earthen floor tends to become cold during winter, enhancing thermal insulation and airtightness improves comfort. Conversely, it also offers the benefit of feeling cooler in summer. Adjusting the thermal environment according to the seasons is key to ensuring year-round comfort.
Multipurpose functionality enabled by storage shelving.
By installing storage shelves on the walls of the earthen floor area, a variety of items such as shoes, outdoor equipment, tools, and gardening supplies can be organized efficiently. Both open shelves and those with doors can be selected according to the intended use. Enhanced storage capacity improves the functionality of the earthen floor space.
A Place for Family Gatherings.
By integrating the earthen floor area with the dining and living spaces, it becomes a lively place where the family gathers. Placing tables and chairs on the earthen floor allows for dining, children’s play, and other flexible uses. The earthen floor becomes the focal point of daily life.
Fusion of Tradition and Modernity.
The doma is a traditional Japanese space, but by integrating it with contemporary design, a new appeal emerges. Combining modern furniture and lighting creates a unique blend of Japanese and Western aesthetics. While inheriting tradition, create a doma that suits modern living.
Setting Appropriate Corridor Widths.
The effective width of corridors is stipulated by the Building Standards Act to be at least 75 cm; however, when considering wheelchair accessibility, a minimum width of 85 cm is recommended. For two-way passage, a width of 1.2 m or more is desirable. Nonetheless, excessively wide corridors may lead to inefficient use of floor area, so decisions should be made taking into account the family composition and potential future changes.
Design Strategies for Daylighting and Spaciousness.
Corridors tend to be enclosed spaces; however, by incorporating windows or connecting them to atriums, they become bright and open areas. Utilizing clerestory windows and skylights allows for natural light penetration while maintaining privacy. Installing doors with glass panels in each room is also effective in enhancing brightness.
Creating Atmosphere Through Lighting Design.
In corridor lighting, it is essential to ensure sufficient brightness for safe passage while creating a soft and inviting ambiance. Combining downlights, wall-mounted bracket lights, and footlights results in a space with beautiful shadows and depth. Incorporating motion sensor-activated lighting enhances safety during nighttime movement and contributes to energy efficiency.
Utilization Methods for Wall Surfaces.
The corridor walls can be utilized as a gallery to display family photographs and artworks. By installing picture rails and illuminating the pieces with spotlights, the artworks can be enjoyed on a daily basis. Additionally, custom-built bookshelves integrated into the wall surface can transform the corridor into a functional reading nook.
Ensuring Adequate Storage Space.
By providing storage adjacent to the corridor, the storage capacity of each room can be supplemented. Plan with a clear purpose in mind, such as linen closets, cleaning supply storage, or seasonal item storage. Matching the door colors and materials with the walls creates a clean and cohesive appearance.
Ventilation and Airflow.
Corridors are areas where air tends to stagnate. Enhancing natural ventilation by opening windows or utilizing corridors as ventilation pathways for a 24-hour mechanical ventilation system improves the overall indoor air quality. Additionally, incorporating undercuts at the bottom of each room's door is an effective strategy to facilitate airflow.
Optimization of Circulation Flow.
The arrangement of corridors directly impacts the efficiency of access to each room. It is important to consider a layout that minimizes corridor area while enabling efficient access to the necessary rooms. Incorporating a continuous circulation flow can also create a user-friendly floor plan without dead ends.
Expressing Spatial Character Through Variations in Width.
By partially altering the width of a corridor, variations and rhythm are introduced into the space. Expanding areas near room entrances or slightly widening spaces by windows to create small study corners can imbue otherwise monotonous corridors with distinct personality.
Installation of Handrails and Preparation for the Future.
It is recommended to incorporate backing in the corridors to allow for the installation of handrails in preparation for advanced age. If handrails are installed later without backing, reinforcement work on the walls will be required. Currently, it is advisable to keep the design simple and aesthetically focused, while planning so that handrails can be added when needed.
Changing Impressions through Color Planning.
The colors of corridor walls and ceilings significantly influence the spatial impression. Light colors such as white and beige create a sense of spaciousness, while dark tones evoke a calm atmosphere. Using an accent color on a single wall can also prevent monotony.
Handling Sightlines and Visual Terminations.
By installing windows or displaying artworks at the end of corridors, the visual termination points become aesthetically pleasing. In the case of long corridors, arranging elements to change the direction of sightlines midway helps avoid monotony. It is essential to incorporate design strategies that prevent a sense of dead-end confinement.
Reevaluating the Necessity of Corridors.
By minimizing the creation of corridors in the floor plan, it is possible to allocate a larger area to living spaces. Layouts that feature a central living room with a circular flow or arrangements that connect rooms directly without corridors, or with minimal corridors, are worth considering. However, it is also important to take into account issues related to privacy and acoustics.
Q&A
House with a Doma|Stylish Hallways|Q&A
What is the practical size to allocate for a doma (earthen floor space)?
The appropriate size varies depending on its intended use, but an area of approximately 4 to 6 tatami mats allows for versatile functionality. For storage of bicycles or strollers, 2 to 3 tatami mats may suffice. Considering the family composition and lifestyle, it is advisable to design with some margin to accommodate potential future changes in use.
What materials are suitable for flooring in earthen-floored spaces (doma)?
Common materials include tamped earth (sanwado), mortar, and tiles. Mortar is relatively inexpensive and provides a clean finish but requires measures to prevent cracking. Tiles offer excellent ease of cleaning and a wide range of design options. Natural tamped earth has moisture-regulating properties but requires regular maintenance. Selection should be made according to the intended use.
How should the boundary between the earthen floor area and the living space be planned?
It is common practice to establish a clear distinction by incorporating a step or level difference. A height difference of approximately 15 to 20 centimeters helps prevent the intrusion of dust and dirt. Using sliding doors or shoji screens as partitions allows for flexible control between openness and privacy. Additionally, to maintain thermal performance, proper insulation and airtightness treatment at the boundary are crucial considerations.
What are the appropriate methods for implementing thermal insulation measures in earthen floors?
The standard practice is to install insulation materials beneath the earthen floor slab, known as slab insulation. It is essential to use airtight gaskets between the foundation and the sill plate to prevent cold air infiltration into the interior. Additionally, an appropriate ventilation strategy is necessary to address condensation issues. Designing with consideration for the overall thermal performance balance of the entire residence is crucial.
Is ventilation equipment necessary for work conducted on earthen floors?
Depending on the nature of the work, we recommend installing exhaust fans to manage odors, humidity, and dust emissions. It is effective to combine mechanical ventilation with natural ventilation. Please also consider integrating the system with a 24-hour ventilation system.
Is it possible to design with an emphasis on the connection between the earthen floor space and the garden?
By incorporating sliding doors that provide direct access from the doma to the garden and creating large openings without level differences, a seamless integration between indoor and outdoor spaces can be achieved. Techniques such as extending the eaves to form a semi-outdoor area or continuing the doma flooring material onto the outdoor terrace are also effective. This approach results in a highly attractive residence that allows for gardening activities even during rainy weather.
How can a corridor be transformed from a mere passageway into a rich, gallery-like space?
Effectively utilizing the wall surfaces is recommended. This can include incorporating niches that take advantage of the wall thickness or installing picture rails to display paintings and photographs. Planning spotlights or bracket lights to illuminate the walls will enhance the displayed items and create an atmosphere reminiscent of an art gallery. If the corridor width allows, placing a small console table can also add a charming touch.
Are there any methods to make narrow and typically dark corridors feel bright and spacious?
Installing a fixed window on the wall at the end of the corridor allows the line of sight to extend outward, creating a sense of depth. Additionally, incorporating high-side windows near the ceiling can introduce stable natural light while maintaining privacy. Unifying the walls and ceiling with expansive colors such as white, combined with using light-colored flooring materials, is also effective in visually enlarging the space.
What are the key points to consider when selecting flooring materials for a corridor?
Since corridors serve as transitional spaces connecting various rooms, maintaining continuity with the flooring materials of adjacent rooms creates a cohesive atmosphere throughout the home. For example, if the living, dining, and kitchen areas (LDK) feature hardwood flooring, it is standard practice to use the same material in the corridor. If a different material is chosen, it is advisable to coordinate the color tones to ensure visual harmony. Additionally, selecting materials that are resistant to scratches and highly durable is essential.
Are there any design strategies to make a corridor lined with doors appear more aesthetically pleasing?
Aligning the doors as full-height 'high doors' that extend to the ceiling eliminates the wall space above the doors (the soffit), resulting in a very clean and streamlined corridor. Additionally, unifying the door designs, colors, and hardware details such as door handles is an essential factor in bringing order and cohesion to the space.
Please explain the advantages and disadvantages of a floor plan that eliminates hallways.
Eliminating hallways allows the area typically allocated to them to be reassigned to the living, dining, and kitchen (LDK) spaces or individual rooms, thereby maximizing the efficient use of space. This approach also fosters a greater sense of unity throughout the home. On the other hand, it can pose challenges in maintaining privacy and may result in increased transmission of everyday noise between rooms. It is important to carefully consider which aspects of daily living to prioritize when adopting such a layout.
Do you have any ideas for the effective utilization of corridors?
Corridors can be designed as multifunctional spaces by incorporating areas such as study nooks or reading corners that make use of their width. By installing wall-mounted desk counters or movable furniture, the corridor transforms from a mere passageway into an integral part of daily living. It is also advisable to plan with consideration for natural lighting and ventilation.
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