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Eelgrass Insulated Floating Home with Wattle and Daub Walls

Authors:
Konstantina Moutselou, Christina Chatsiou, Eirini Pappa
Eelgrass Insulated Floating Home with Wattle and Daub Walls
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Built using wattle and daub walls and insulated with eelgrass, this floating home adapts to rising water levels while providing a compact and comfortable living space for a couple.
5 key facts about this project
01
Buoyancy system enables the home to rise and fall with changing water levels.
02
Walls constructed using traditional wattle and daub technique for thermal efficiency.
03
Eelgrass used for insulation, promoting eco-friendly building practices.
04
Designed specifically for a flood-prone environment, enhancing resilience.
05
Compact layout optimizes space for efficient living for a couple.

The Contrapuntal Home is designed for a couple seeking a sustainable lifestyle while living off the grid. Positioned in a flood-prone area, this dwelling showcases modern amphibious architecture. It addresses the challenges of climate change by integrating resilience and adaptability into its design. The project harmonizes with the environment, incorporating lessons from historical building techniques alongside contemporary ideas.

Buoyancy System

Central to the design is a buoyancy system that uses expanded polystyrene (EPS) foam blocks. These blocks allow the structure to float and adjust to rising water levels during floods. Steel guidance posts provide stability for the home, ensuring that it remains safe while rising and falling with the water. This design allows nature to be a part of daily life rather than a barrier.

Wattle and Daub Construction

The exterior and interior walls of the home are built using the wattle and daub technique. This construction method involves a framework of woven branches filled with mud or clay, creating walls that are lightweight yet strong. This approach offers excellent thermal and sound insulation. Using traditional methods not only supports local craftsmanship but also aligns with the sustainability goals of the project.

Use of Seaweed

Seaweed, specifically eelgrass, is another important material in the design. It is used as insulation for the walls and roof, providing effective thermal and sound protection. This natural material contributes to the home's overall environmental impact, promoting renewable resources. Its application showcases a commitment to ecological living and reduces reliance on synthetic materials.

Adaptive Living Spaces

The layout maximizes space while ensuring comfort for residents. A loft sleeping area is included alongside essential areas such as the kitchen and bathroom. This arrangement makes efficient use of the smaller footprint, creating a functional and cozy living environment. Additionally, solar panels and water collection systems enhance the home's ability to operate independently from external resources.

The exterior design of the Contrapuntal Home creates a visual relationship with the surrounding landscape. It rises from the water, providing a unique viewpoint while contributing to a lifestyle that respects nature.

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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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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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