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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.
Emphasizing Continuity with the Interior.
Aligning the floor levels of the living and dining areas with the terrace creates a cohesive visual and circulation flow. Minimizing level differences allows the terrace to be used naturally as an extension of the interior, enhancing the sense of spaciousness. However, careful consideration must be given to waterproofing details; therefore, close consultation with the designer is essential.
Commitment to Selecting Flooring Materials.
The atmosphere of a terrace can vary significantly depending on the flooring materials used, such as wood decking, tiles, or natural stone. It is advisable to consider factors like durability, maintenance requirements, and the tactile sensation when walking barefoot. While natural wood offers warmth, modern alternatives like composite decking and porcelain tiles have seen improvements in texture and quality, making them worthy options to consider.
Appropriate Planning of Roofs and Eaves.
To create a terrace usable in all weather conditions, the installation of roofs and eaves is effective. Incorporating awnings allows for control of sunlight and rain while maintaining a sense of openness. When opting for a fixed roof, it is essential to design with a balanced consideration of natural lighting and ventilation.
Consideration for Privacy.
By appropriately screening views from neighboring houses and roads, the terrace becomes a more relaxing space. Privacy can be secured without a sense of confinement through the effective placement of vegetation with adjusted height and density, lattice screens, and privacy walls. Planning with attention to airflow and natural light further enhances comfort.
Creating Nighttime Ambiance with Lighting.
The terrace from dusk to night can be transformed into an attractive space through thoughtful lighting design. By combining elements such as footlights and uplights, a soft and comfortable illumination can be achieved. Incorporating dimming functions allows for versatile lighting adjustments tailored to different scenes, enhancing convenience and ambiance.
Creating a Sense of Seasonality through Planting Design.
By arranging plantings around the terrace, the space allows occupants to experience the changing seasons up close. Selecting deciduous trees provides shade in summer and allows sunlight to penetrate in winter. Utilizing potted plants facilitates easy rearrangement and simplifies maintenance. It is advisable to plan with consideration for the growth of the plants.
Consideration of Faucet Installation Location
The presence of a faucet significantly enhances convenience for activities such as watering plants and cleaning up after barbecues. Selecting a highly designed standing faucet or opting for a wall-embedded type can achieve a balance between functionality and aesthetics. In regions where pipe freezing is a concern, it is also important to choose faucets equipped with a drainage function to prevent freezing.
Furniture and Equipment Layout Planning.
Envision how you intend to use the terrace and consider the necessary furniture and equipment accordingly. Custom-built fixed benches can also serve as storage, while movable furniture allows for flexible arrangement based on usage. Installing outdoor electrical outlets enables the use of lighting fixtures and cooking appliances.
The Importance of Drainage Planning.
A well-designed plan for proper rainwater drainage significantly influences the comfort and durability of a terrace. By incorporating an appropriate slope on the flooring surface and strategically positioning drains and gutters, the formation of water puddles on the terrace can be minimized. Selecting permeable flooring materials is also an effective method to enhance drainage performance.
Utilizing Orientation and Sunlight.
The placement of terraces is constrained by site conditions, but it is desirable to plan them in orientations that receive ample sunlight. South-facing terraces provide warmth during winter, though measures against summer sun exposure are necessary. East-facing terraces allow enjoyment of morning light, while west-facing ones offer an appealing ambiance at dusk. It is important to understand and incorporate the characteristics of each orientation in the design.
Create a Cohesive Finish.
By harmonizing the finishing materials of terrace floors, walls, and railings with the main building and exterior structures, a unified and aesthetically pleasing space is achieved. Matching color tones and material textures fosters a refined impression. Deliberately incorporating accent materials in select areas can also be an effective design strategy.
Balance Between Ventilation and Sunshade.
Adequate ventilation is essential for a comfortable terrace space. Completely enclosing the surrounding walls and screens can obstruct airflow, creating harsh conditions during the summer. Utilizing louvers and latticework allows for privacy while ensuring proper ventilation. Additionally, arranging vegetation with consideration for airflow pathways is recommended.
Q&A
House with a Doma|Stylish Terrace|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.
What are the key points for creating a terrace that integrates seamlessly with the living room?
It is recommended to use sashes with a "flat rail" design that aligns the floor height with the living room. This eliminates any step between the interior and exterior, creating a continuous spatial flow and enhancing the visual sense of openness. Additionally, matching the color tone and texture of the living room flooring with that of the terrace flooring can further produce a seamless and sophisticated connection.
I am concerned about the sightlines from neighboring houses. Is it possible to have an open terrace while maintaining privacy?
Yes, it is possible. Typically, walls or fences are installed to block views from surrounding properties; however, completely enclosing the space can create a sense of confinement. By combining wooden louvers that allow light and air to pass through with strategic landscaping, you can ensure privacy while maintaining a comfortable sense of openness.
I am having trouble deciding on flooring materials for a terrace. Could you explain the advantages and considerations of tiles versus wood decking?
Tiles offer high durability and create a modern, hotel-like aesthetic. They are easy to clean with water and excel in terms of maintenance. On the other hand, wood decking provides a comfortable surface for bare feet and evokes a natural, warm atmosphere. However, if natural wood is used, regular repainting maintenance may be required to prevent splintering and fading.
Is a roof necessary for a terrace?
It is recommended to decide based on the frequency of use and intended purpose. A lightweight roof structure, such as a pergola, can provide shade while maintaining a sense of openness. If the terrace is also used for drying laundry, adjustable solutions like awnings are worth considering to accommodate varying needs.
How should water faucet installation and drainage planning be approached for terraces?
It is recommended to install an outdoor faucet to accommodate plant watering and cleaning needs. For drainage, ensure an appropriate slope and plan for directing water to rainwater inlets. Maintaining a gradient of approximately 1/100 is essential to prevent water pooling on the floor surface. Additionally, to address freezing concerns during winter, it is necessary to use frost-proof faucets and implement proper insulation measures.
How should the relationship between the terrace and the garden be considered?
The terrace can be regarded as an intermediate space that connects the interior with the garden. For example, incorporating gently descending steps from the terrace to the garden or arranging plantings around the terrace to create a green-enveloped environment. Designing with an emphasis on unobstructed sightlines that allow occupants to enjoy garden views and the changing seasons while spending time on the terrace fosters a sense of comfort.
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