CEM Kamanar

Location:
Thionck Essyl, Senegal
Type of use:
Educational
Year of construction:
2016-2020
Size:
1900 m²
Architect:
dawoffice

Necessity

The CEM Kamanar project responds to an urgent social need in Thionck Essyl, where half of the local youth had no access to secondary education. The only existing school was overcrowded and unable to expand, pushing many teenagers to leave the community in search of learning opportunities. This project emerged directly from the territory and its people, not from financial incentives. It was conceived as a public good, co-defined with the municipality and families to restore equity of access to education. Environmentally, it addresses the challenge of ensuring thermal comfort in a hot climate without mechanical systems, relying instead on passive strategies and locally sourced materials. Rather than imposing a building, the project provides a community-rooted tool: an adaptable modular system capable of growing according to real educational needs over time.

Affordability

The school is a public and free facility accessible to nearly the entire population of Thionck Essyl and nearby villages. More than 90% of the intended users can benefit from the improved learning conditions provided by the new campus. Affordability is ensured through the use of local earth, wood, and artisanal finishes, all produced within the community. This reduces construction costs, minimizes reliance on industrial imports, and keeps most of the economic value circulating locally. Compared to conventional school buildings in the region, CEM Kamanar delivers significantly higher spatial and climatic quality at a remarkably lower cost. Its affordability extends beyond construction: passive cooling eliminates energy expenses for thermal comfort, enabling long-term economic sustainability for the community and the public authorities.

Sufficiency and Efficiency

The project balances essential comfort with minimal technological dependency through a climate-responsive design rooted in local knowledge. Each classroom (made of a a vaulted and called “awla”) uses cross-ventilation, earth’s thermal mass, and a ventilated shading layer to create naturally cool interiors without mechanical air-conditioning. This approach challenges the conventional reliance on energy-intensive systems in hot climates, demonstrating instead that geometry, porosity, and material logic can achieve comfort elegantly and efficiently. The construction system is intentionally simple, using techniques that can be learned and reproduced by local workers. This ensures long-term maintainability and strengthens local autonomy. The result is a building that performs well, is easy to understand and repair, and remains perfectly aligned with the cultural and environmental context.

Simplicity and Appropriateness

The project balances essential comfort with minimal technological dependency through a climate-responsive design rooted in local knowledge. Each classroom (made of a a vaulted and called “awla”) uses cross-ventilation, earth’s thermal mass, and a ventilated shading layer to create naturally cool interiors without mechanical air-conditioning. This approach challenges the conventional reliance on energy-intensive systems in hot climates, demonstrating instead that geometry, porosity, and material logic can achieve comfort elegantly and efficiently. The construction system is intentionally simple, using techniques that can be learned and reproduced by local workers. This ensures long-term maintainability and strengthens local autonomy. The result is a building that performs well, is easy to understand and repair, and remains perfectly aligned with the cultural and environmental context.

Scalability

The construction system is deeply integrated into local labor and supply chains: earth is extracted directly on site, timber is sourced and crafted locally, and all work is carried out by community members and volunteers. This makes the project highly scalable in regions with similar material availability and cultural practices. The training of 164 local workers created a skilled workforce capable of replicating the techniques learned, particularly in earth construction, carpentry, and finishing, thereby multiplying the project’s potential for expansion. Scalability is not only technical but social: the modular system allows communities to build at their own pace, according to needs and resources.

Beauty

Beauty in CEM Kamanar emerges from its deep connection to place. The catenary earth vaults recall traditional materials while expressing a contemporary form, which is the shape in witch earth can better work, dignified architectural language. The material palette: earth, wood, broken-tile mosaics, and shaded courtyards, echoes the colors, textures, and rhythms of Casamance. Existing trees are preserved and celebrated, shaping courtyards and gathering spaces that structure the daily life of the school. Rather than imposing an external aesthetic, the design grows from the climate, the soil, and the community’s craftsmanship. Its beauty lies in authenticity.

Unique Principles of Success

The success of the CEM Kamanar is the result of a coherent integration of social purpose, architectural intelligence, community engagement, and deep understanding of the local context.

1. Building with Local Materials

A fundamental principle of the project was the decision to build with what the territory offers. Earth, abundant and culturally familiar, became the main material, reducing costs, energy consumption, and environmental impact. The extraction of soil on site even gave rise to the school’s sports fields, demonstrating a circular logic where resources remain within the community. The earth was transformed manually into Compressed Earth Blocks (CEBs), produced on-site with a press operated by local workers. These CEBs were used to build each classroom as a catenary vault. Although the vaults may seem like a stylistic gesture, they are in fact a structural necessity dictated by the material itself. Earth can only withstand compressive forces and cannot tolerate tension. Most horizontal roofs generate tension, which earth cannot carry. The catenary vault, however, is the pure geometric form that naturally carries loads entirely in tension. If a chain is suspended between two points, gravity makes it adopt a catenary curve; inverting that tensed curve upside down produces an arch that channels forces entirely in compression, exactly as earth requires. For this reason, the catenary vault was chosen: it aligns perfectly with the natural structural behavior of the material, enabling spacious, durable, and climatically efficient buildings built entirely by hand.

2. Using Climate as an Ally

Climate was approached with intelligence rather than technology. Instead of relying on mechanical air-conditioning, the design uses cross-ventilation, porosity, thermal mass, and a shaded air chamber to maintain comfort throughout the year. The porous earth vaults behave similarly to an evaporative cooler, known in Spanish as "efecto botijo": as the material slowly releases moisture, it cools the air passing through and around it. This effect, combined with constant airflow and the protective shade cast by the metal sheet above, results in excellent climatic performance without consuming energy. The building remains cool, breathable, and naturally adapted to the tropical environment.

3. Creating an Adaptable and Modular System

Another core principle is the creation of a modular system able to adapt over time. The “awlas” form a flexible grid that allows the school to grow with evolving needs while creating courtyards, shaded areas, and outdoor classrooms that structure the campus's social life. This adaptability strengthens long-term resilience and makes the model easily replicable in similar contexts.

4. Involving the Community

Local authorities, families, workers, and volunteers collectively contributed to decision-making and construction, reinforcing ownership and strengthening community identity. This collaboration also ensured that economic resources stayed within the town, supporting small vendors, artisans, and households throughout the building phase.

5. Importing Skills and Reinforcing the Local Economy

Construction became a training platform that provided employment but, more importantly, professional skills for people who previously had no defined trade or only very basic experience. Over four years, 164 individuals were trained in compressed earth construction, masonry, carpentry, roof fabrication, welding, plumbing, electrical installations, finishing techniques, and landscaping. This practical learning translated into long-term economic opportunities. One of the clearest examples is the carpenter Lamine Sambou, who initially produced simple furniture on his own and, after learning advanced carpentry during the project, now works on structural timber elements, complex furniture, and employs four people in his workshop. His trajectory reflects how architecture can generate empowerment, autonomy, and durable local development. Beyond providing a functioning school for 500 students, the project leaves behind a strengthened community with new technical capacities, higher self-confidence, and a clearer sense of collective potential.

Limitations

The community-based and training-oriented approach, one of the project’s greatest strengths. also requires more time, coordination, and sustained on-site guidance than a conventional contractor-led process. Training workers from scratch in eco-construction techniques demands continuous presence, mentoring, and flexibility throughout the building phase. Climatic conditions in Casamance, particularly heavy seasonal rains, require periodic maintenance of certain exposed components. Metal roofing sheets, for instance, may need replacement or reinforcement after some years of intense weathering. In the case of replicability in other contexts, the model would require specific adaptations related to land availability, especially in dense urban environments or areas with strict regulations. The CEM’s construction technique relies on the presence of suitable earth, which may limit direct replication in regions without appropriate soil unless preceded by testing and material adaptation. Even with these limitations, the project’s core principles remain transferable and adaptable to a wide range of environments.

CEM Kamanar

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