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Charred Hardwood Roofs Bridging Geological Fissures in a Volcanic Landscape

Authors:
Ramiro Carro, Santiago Perez, Facundo Hernandez, Juliana Lareu
Charred Hardwood Roofs Bridging Geological Fissures in a Volcanic Landscape
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Charred hardwood roofs interconnect dual caves, bridging the geological divide between tectonic plates while providing a multifaceted visitor experience within Iceland's volcanic landscape.
5 key facts about this project
01
Charred hardwood shingles provide both durability and a distinct visual texture.
02
The design captures and highlights the geological fissure between two tectonic plates.
03
Modular components allow flexibility for future expansion along the landscape.
04
Strategic roof placement enhances interaction with the surrounding volcanic features.
05
The structure integrates natural lighting to enhance visitor experience in caves.

The Iceland Cave Tower project is located in a unique setting at the intersection of the Eurasian and North American tectonic plates. The design explores the concepts of hiding and peeking, encouraging visitors to engage with the natural landscape. Three interconnected roofs link two caves, creating a cohesive structure that enhances the experience of the surrounding geological features.

Design Concept

At the heart of the design are three wooden roofs that serve to connect the two continental contexts. These roofs do more than provide shelter; they also define spaces and guide movement throughout the site. Their arrangement emphasizes the geological crack, inviting visitors to explore the relationship between architecture and nature.



Roof Structures

The Karlagjá roof acts as the main access point for visitors, leading them toward several programmatic modules. These modules facilitate access to the largest cave and the tower, promoting exploration through clearly defined pathways. In contrast, the Kvennagjá roof offers a quieter experience within the smaller cave, catering to those seeking a more intimate space.



Geological Integration

The Grjótagja roof is strategically positioned on the North American plate, taking advantage of the elevation difference between the tectonic plates. This placement not only creates a visual focal point but also provides structural stability against Iceland’s challenging weather. The design respects and responds to its environment, creating a thoughtful presence within the volcanic landscape.



Material Considerations

Materials play a key role in the project, linking it to the surrounding area. The roofs are constructed using prefabricated wood panels, which allow for efficient construction while maintaining a connection to the landscape. Charred hardwood strips enhance both the appearance and durability of the roofs. The timber structure and metal piles further strengthen the overall design.



The modular nature of the design allows for growth and adaptation over time. Structures can evolve along the geological crack, reflecting the ongoing changes in the landscape. This aspect of the project emphasizes the relationship between architecture and the environment, highlighting a commitment to respecting the natural setting.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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