Ecological Matrix: Breathing Net Pavilion by Soltozibin Architects: A Sustainable Timber Pavilion in Seoul Forest

The Ecological Matrix: Breathing Net Pavilion, designed by Soltozibin Architects, is a remarkable example of contemporary sustainable pavilion architecture located in Seongdong-gu, Seoul, South Korea. Completed in 2023, this innovative structure redefines how public facilities within urban parks can respond to ecological awareness and the evolving needs of cities in the post-COVID-19 era.

With a total area of 310 square meters, the pavilion was led by architects Cho Namho and Lim Kiung, with construction by Supia Construction and structural engineering by GUMNA Structural Engineering. Positioned within the renowned Seoul Forest, the project reflects a deep architectural exploration of ecology, connectivity, and the evolving relationship between urban spaces and natural environments.

Historically, global crises such as pandemics have reshaped cities, often exposing weaknesses while simultaneously encouraging new urban solutions. The recent COVID-19 pandemic highlighted the critical importance of urban green spaces and ecological infrastructure. The Breathing Net Pavilion emerges as an architectural response to this shift, proposing a model where architecture, ecology, and public life intersect within a flexible park structure.

Seoul Forest: From Horse Racing Track to Ecological Urban Park

Seoul Forest itself embodies a powerful narrative of urban transformation. Once a horse racing track, the site has been reinvented as one of the most significant urban ecological parks in Seoul. The park now functions as a major green lung for the city, providing recreation, biodiversity habitats, and cultural spaces for public gatherings.

The Ecological Matrix Pavilion integrates seamlessly into this ecological landscape. Rather than imposing a rigid architectural object within the park, the project emphasizes connectivity, openness, and environmental integration. It acts as a flexible performance pavilion and resting space, designed to accommodate various public events, performances, and everyday leisure activities.

By redefining the spatial relationship between pathways, gathering areas, and performance zones, the pavilion becomes a social catalyst that enhances the park’s role as a community hub.

The Ecological Matrix Concept: From Cells to Cities

The design philosophy behind the pavilion is rooted in the concept of the ecological matrix, where relationships between elements create a larger living system. In contrast to traditional anthropocentric design approaches, which treat individual components merely as tools within a larger structure, ecological thinking sees each element as capable of influencing and expanding into others.

This philosophy draws inspiration from natural systems. In ecological structures, cells form materials, materials create details, details develop into structures, and structures evolve into cities. Timber itself embodies this logic: its fibers and cellular composition naturally express a hierarchy of interconnected systems.

The Breathing Net Pavilion reflects this principle through its architectural composition. The design moves fluidly between part and whole, creating a network of relationships that allow the pavilion to function as both a spatial structure and a conceptual ecological model.

Redefining Circulation and Public Interaction

The original structure previously located on the site functioned primarily as a rigid stage that separated pedestrian pathways from the park landscape. This configuration created a clear division between front and back spaces, limiting the site’s spatial potential.

Soltozibin Architects reimagined the entire spatial organization by relocating the stage to the center of the structure. This transformation enables the pavilion to connect four different pedestrian routes and two major resting zones within the park.

By positioning the stage centrally, the pavilion becomes a neutral spatial connector, bringing together movement, rest, and performance. Visitors approaching from multiple directions can pass through or gather beneath the structure, transforming it into a dynamic social and ecological intersection within Seoul Forest.

The new configuration allows the pavilion to function simultaneously as:

• A performance stage
• A shaded resting area
• A circulation hub
• A flexible event space

This adaptability ensures that the pavilion remains active throughout the day and across different seasons.

Timber Architecture: Balancing Softness and Structural Strength

Material selection plays a crucial role in the architectural identity of the pavilion. The architects deliberately chose wood as the primary material due to its unique balance of softness and structural resilience.

Unlike steel and concrete, which often introduce rigid and intimidating architectural expressions, timber provides a warm and approachable atmosphere that harmonizes with the surrounding landscape. This softness allows the pavilion to feel more integrated with nature, reinforcing the project’s ecological philosophy.

To ensure durability, the structure uses thermowood, a specially treated timber that improves resistance to moisture, weathering, and deformation. Thermowood undergoes a heat-treatment process that enhances its stability while preserving the natural beauty and texture of wood.

This material choice allows the pavilion to maintain long-term structural performance while reducing maintenance requirements, an important consideration for public park architecture.

Porous Timber Structure: The Breathing Net

One of the most distinctive features of the pavilion is its porous structural system, which gives the project its name: the Breathing Net.

The architecture incorporates a 200-millimeter-thick porous timber structure composed of modular units measuring 1 meter by 1 meter. This system creates a semi-permeable architectural skin that filters light, air, and views.

The porous design provides several architectural and environmental advantages:

• Reduced surface exposure to harsh environmental conditions
• Improved durability and longevity of the timber structure
• Enhanced ventilation and airflow
• Soft diffusion of natural light
• A visually dynamic facade with changing shadows

The structural grid also reinforces the ecological matrix concept by expressing modular growth patterns similar to natural cellular systems.

Expansive Roof Structure and Flexible Performance Space

Covering the pavilion is a carefully designed roof system composed of timber rafters spaced at one-meter intervals. This rhythmic structural framework creates a lightweight canopy that protects the central performance area while maintaining visual openness.

Beneath the roof, the pavilion accommodates a 30-meter by 11.5-meter spatial compound that integrates the stage, circulation pathways, and stair elements into a unified architectural environment.

One of the most impressive aspects of the design is the ability to extend the performance area into an 18-meter open stage. This flexibility allows the pavilion to host a variety of activities, including:

• Cultural performances
• Public gatherings
• Community events
• Informal recreation

The design therefore transcends the traditional notion of a static stage, transforming the pavilion into a multifunctional cultural infrastructure within the park.

Architecture as an Ecological Connector

The Ecological Matrix Pavilion demonstrates how contemporary architecture can operate as an ecological mediator rather than a dominant object. By emphasizing porous materials, open circulation, and interconnected spatial systems, the project enhances both environmental and social relationships within Seoul Forest.

The pavilion encourages visitors to move freely through its structure, interact with the surrounding landscape, and participate in shared cultural experiences. In doing so, it becomes more than just a building, it becomes an architectural ecosystem embedded within the urban park.

A Model for Future Urban Park Pavilions

As cities worldwide increasingly prioritize sustainability and public well-being, projects like the Breathing Net Pavilion offer valuable lessons for the future of urban park architecture.

By combining ecological thinking, timber construction, modular design, and spatial flexibility, Soltozibin Architects have created a pavilion that responds directly to contemporary environmental and social challenges.

The Ecological Matrix Pavilion stands as a powerful example of how architecture can support urban resilience, ecological awareness, and community engagement within modern cities.