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Curvilinear Metal Shell with Etfe Membrane and Rainwater Filtration for Sustainable Trekking Shelter

Authors:
Scott Erdy, Zamir Garcia, Jose Pertierra, Yuheng Ouyang
Curvilinear Metal Shell with Etfe Membrane and Rainwater Filtration for Sustainable Trekking Shelter
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A curvilinear metal shell envelops an ETFE membrane and integrates a rainwater filtration system, creating a sustainable shelter for trekkers in Iceland's rugged landscape.
5 key facts about this project
01
Curvilinear exterior design enhances wind resistance and aesthetic integration with the landscape.
02
ETFE membrane provides natural lighting while maintaining thermal insulation and structural efficiency.
03
Local volcanic rock and sand are utilized for the rainwater filtration system, connecting the design to its site.
04
A wind turbine harnesses renewable energy, promoting self-sufficiency for user needs.
05
Sleeping areas are strategically oriented to maximize views of the surrounding Icelandic scenery.

**Project Overview**

Located within the striking landscapes of Iceland, öryggi skel, or “Safety Shell,” is designed as a trekking cabin that prioritizes user comfort while fostering a connection to nature. The intent of the project is to create a shelter that resonates with its environment, emphasizing sustainability in response to the unique climatic and geological conditions of the region. This structure serves as a resting point for trekkers, promoting engagement with the natural landscape rather than mere observation.

**Material Selection and Sustainability**

The material palette of öryggi skel is carefully chosen to reflect the project's sustainability objectives. The exterior is clad in a tough metal that provides durability against the extreme weather conditions typical of Iceland. A double-layer ETFE (Ethylene Tetrafluoroethylene) membrane allows natural light into the cabin while offering insulation, contributing to the building's energy efficiency. In addition, local volcanic rocks, sand, and Icelandic moss are integrated into a water filtration system, reinforcing the commitment to utilizing regional materials. Natural insulation solutions sourced locally enhance the cabin's operational effectiveness across varying climates.

**Design Integration and User Experience**

The design of öryggi skel showcases a curvilinear exterior that mirrors the organic forms found in Iceland's natural landscape, promoting minimal environmental impact and wind resistance. The interior layout is optimized for user experience, featuring sleeping areas aligned with the horizon to foster spatial orientation and balance. Essential amenities such as a restroom and shower are incorporated into the design seamlessly.

Innovative energy solutions supplement the cabin's functionality, including a wind turbine to harness renewable energy and a rainwater collection system that uses locally sourced volcanic rock for filtration. These elements contribute to the cabin's self-sufficiency, ensuring that occupants have access to fresh air and water while immersed in the natural surroundings.

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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.

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