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Rainwater Harvesting Shelters with Reed Roofing in Coastal Community

Authors:
Lupascu Catalina, Stroia Andreea, Marinescu Ionut Alexandru, Domnica Razvan-constantin
Rainwater Harvesting Shelters with Reed Roofing in Coastal Community
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Utilizing rainwater harvesting and sustainable reed roofing, the design offers modular housing solutions that promote self-sufficiency and community resilience in a coastal slum environment.
5 key facts about this project
01
Modular platforms allow for individual customization while maintaining community integrity.
02
Rainwater harvesting systems provide a sustainable water source for households and gardens.
03
Gardens utilize aeroponic systems to maximize water efficiency for food production.
04
Vermicomposting enhances waste management, improving soil quality in urban gardening.
05
Reed roofing offers natural soundproofing and insulation, suitable for coastal conditions.

The design addressing the social and housing issues in the Makako slum of Lagos, Nigeria, offers a modular solution for the unique challenges of living on water. This area, which lacks essential utilities such as water and electricity, requires practical and sustainable habitat strategies. The design honors traditional building methods while providing flexibility for residents to personalize their living environments, enhancing a sense of community.

Design Concept

Modularity is at the heart of the design, allowing families to adapt their platforms to suit their needs. Each module accommodates essential living functions and is arranged around a central courtyard. This layout encourages interaction among residents while ensuring privacy. The design draws inspiration from local architectural traditions, creating a familiar yet functional environment.

Water Management

An effective water management system is crucial in this setting. Rainwater harvesting collects water from the platforms, which is then filtered and stored for household use. This system addresses the scarcity of safe drinking water and is complemented by individual gardens where residents can grow vegetables. Aeroponic systems within the gardens use minimal water, promoting self-sufficiency and food security.

Sustainable Practices

The approach to waste management employs vermicomposting, which uses earthworms to break down organic waste and improve soil quality in gardens. A desalination process, utilizing solar heat for evaporation and condensation, produces additional household water. This ensures a reliable supply for daily needs, including irrigation. Gray water from showers is recycled for toilet use, maximizing water efficiency and reinforcing a commitment to sustainability.

Material Selection

Materials are chosen to fit local practices and environmental conditions. Solid wood provides a strong framework for the structures, ensuring resilience against coastal challenges. Recycled wood in the form of oriented strand board serves as wall coverings, while treated wool offers insulation. The roofing incorporates reed, which enhances soundproofing, and galvanized steel is used for anchoring the structures to withstand the harsh coastal environment. Solid wood beams and planking further support the overall design.

Ventilation is enhanced through horizontal slots in the modules that allow for natural air circulation. This design harnesses ocean breezes, contributing to thermal comfort within the living spaces. The result is a focused effort to create a functional environment that reflects the culture of the community while addressing immediate housing needs.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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