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Hempcrete Walls and Reclaimed Wood in a Compact Hexagonal Structure

Authors:
Kajetan Czudec, Anna Piątek, Anna Kieloch
Hempcrete Walls and Reclaimed Wood in a Compact Hexagonal Structure
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Constructed with hempcrete walls and reclaimed wood, the compact hexagonal structure addresses energy efficiency while providing a versatile housing solution.
5 key facts about this project
01
Built with a central pillar housing essential utilities for efficient space management.
02
Hexagonal design maximizes structural stability while minimizing material use.
03
Incorporates reclaimed wood for aesthetic and environmental sustainability.
04
Cork siding enhances thermal and acoustic insulation without deforestation impact.
05
Designed to withstand extreme weather conditions, addressing climate resilience.

The SNAILHOUSE is a thoughtful response to the need for sustainable housing. It is designed to provide an efficient living solution, inspired by the shape of a snail shell. Situated in an unnamed environmental setting, the house aims to address modern challenges in energy efficiency and resource management. The overall design concept prioritizes a compact form that promotes stability while minimizing the use of materials.

Geometric Form

The shape of the SNAILHOUSE is hexagonal, a form that appears frequently in nature. Similar patterns can be found in beehives and mineral crystals. This arrangement helps to ensure structural stability and reduces the surface area of the building. By doing so, it decreases material needs and lowers energy costs for heating and cooling. The focus on optimally using space makes it a practical choice for energy-efficient living.

Structural Integration

A central pillar is a key feature of the SNAILHOUSE. It houses important systems for water, sewage, and ventilation. This central element not only supports the structure but also simplifies construction and maintenance. The hexagonal design allows for various layouts, accommodating different living arrangements. Homes can be placed in a loose formation, lined up in rows, or grouped together, providing flexibility in how they are constructed and used.

Material Choices

The materials selected for the SNAILHOUSE reflect a commitment to sustainability. Reclaimed wooden planks give the structure a rustic feel while reducing waste by using existing materials. Cork is used for interior siding, providing effective insulation without compromising forest resources. Plywood serves as the main framework, offering durability with low carbon impact. Walls made of hempcrete are known for their insulation properties, and they can be constructed in blocks or applied as a spray. Each of these material choices supports resource-efficient building practices.

Environmental Resilience

Adaptation to climate change is a significant concern for the SNAILHOUSE. The design considers the effects of extreme weather and seeks to withstand potential disasters. By focusing on a compact and sturdy form, it is equipped to handle challenging conditions. The project illustrates a progressive approach to housing, addressing ecological concerns alongside the realities of changing environments.

The link between natural forms and functional living spaces is evident in the SNAILHOUSE. It reflects an intention to create harmony between built environments and nature, aiming to connect both in a practical and meaningful way.

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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.

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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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