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Concave Roof of Reinforced Concrete and Volcanic Ash Creates a Sustainable Café Experience in Iceland

Authors:
Chen Yang, Fenglin Hong, Dingran Chen
Concave Roof of Reinforced Concrete and Volcanic Ash Creates a Sustainable Café Experience in Iceland

Project in-detail

Constructed with a concave roof of reinforced concrete and volcanic ash, the café harmonizes with the surrounding landscape while providing a communal space for visitors to experience the unique geological features of Hverfjall.
5 key facts about this project
01
Constructed with volcanic ash mixed into the concrete for enhanced insulation.
02
Features a concave roof design that mirrors the local landforms.
03
Large glass panels optimize natural light while providing views of the Hverfjall landscape.
04
Incorporates a public courtyard that encourages visitor interaction with the environment.
05
Utilizes local materials to reinforce sustainability and connection to the site.
The café located near Hverfjall Volcano in Iceland represents a synthesis of architecture and landscape, designed to enhance the visitor experience within a unique geological context. The project serves as a functional space for tourists exploring the volcanic region while embodying principles of sustainability and ecological sensitivity. Its design responds to the natural topography, creating a harmonious relationship between built form and the surrounding environment.

Conceptualized to integrate seamlessly with the volcanic landscape, the café features a circular architectural form that mirrors the site's contours. This design choice not only provides aesthetic appeal but also contributes to the structural integrity of the building. Large overhanging roofs offer shelter and create inviting outdoor spaces that foster community interaction. The emphasis on transparency through expansive glass features allows natural light to permeate the interior, while simultaneously framing views of the striking volcanic scenery, drawing attention to the natural beauty of the location.

Materiality and Environmental Integration

The selection of materials underscores the café's dialogue with its environment. Concrete serves as the primary structural element, enhanced with volcanic ash to improve insulation and performance against the region's harsh weather conditions. This choice emphasizes durability while reflecting local geological characteristics. Additional materials, such as volcanic stone and natural wood, are used throughout the interior, reinforcing a sense of authenticity and connection to the landscape.

The roof system is particularly noteworthy, designed as a concave structure that reflects the surroundings and provides substantial insulation. This innovative architectural feature not only serves functional purposes but also cultivates a unique spatial experience inside the café. The play of light and shadow created by the roof further enhances the interior atmosphere. Seasonal adaptability is a key consideration, allowing the café to offer different environments depending on the time of year while maintaining comfort for visitors.

Interior Layout and Functional Spaces

The internal layout is organized into distinct zones that cater to various visitor needs. A public courtyard serves as an introduction to the space, encouraging interaction and engagement with nature. The café itself features a double-height ceiling, enhancing the sense of space and allowing for a dynamic atmosphere that shifts throughout the day.

Circulation throughout the café is designed to facilitate ease of movement while maximizing views of the landscape. A narrow tunnel entry leads visitors from the access point into the main café area, creating a transition that heightens the experience of entering the space. This flow is reinforced by large sliding doors that encourage a seamless connection between indoor and outdoor environments.

Overall, this café near Hverfjall Volcano stands as a representative case of contemporary architecture that is responsive to local conditions and user experience. Its thoughtful integration with the landscape, careful material choices, and unique spatial organization underscore its design significance.

To explore this project further, including detailed architectural plans, sections, and designs, please consider reviewing the comprehensive project presentation. Such elements provide valuable insights into the architectural ideas and design strategies that define this remarkable café.
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100,000€ Prize / 2025

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

Competition organisers

The 10th edition of the MICROHOME architecture competition invites architects and designers from around the world to explore the possibilities of compact, sustainable living. Hosted by Buildner in collaboration with Kingspan and Hapi Homes, this special edition challenges participants to design an off-grid, modular microhome for a young professional couple, with a maximum floor area of 25 m². Designs should prioritize innovation, efficiency, and real-world feasibility. 

A total prize fund of 100,000 € will be awarded, including three main prizes, the Kingspan Award, and the Hapi Homes Award, which will grant 15,000 € and lead to the construction of the selected design. The final registration deadline is September 25, 2025, and winners will be announced on Decebmer 9, 2025. For full competition details and submission guidelines, visit microhome.info.

Microhome

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € PRIZE FUND / KINGPSAN EDITION #10 IDEAS COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Early bird registration deadline 22 May 2025
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