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Gabion-Trombe Wall Structure Blending Volcanic Landscape with Visitor Amenities

Authors:
Nicholas Wilson, Thomas Ross, Amanda Rooney, Anna Nagasugi
Gabion-Trombe Wall Structure Blending Volcanic Landscape with Visitor Amenities

Project in-detail

Constructed with a gabion-trombe wall system, the centre integrates passive solar design principles while providing essential amenities for visitors exploring the unique volcanic landscape of Hverfjall.
5 key facts about this project
01
Constructed with a trombe wall made from local gabion baskets to enhance thermal regulation.
02
Features a central courtyard that serves multiple functions for visitor engagement.
03
Incorporates mass timber construction to reduce environmental impact and improve aesthetics.
04
Provides five view portals for framed landscape vistas, enhancing the visitor experience.
05
Designed to maximize solar gain while maintaining visual connection to the surrounding terrain.

Located at the foot of the Hverfjall crater in Iceland, the Hverfjall Visitor Centre serves an important role for those exploring the area’s unique geological features. The design embodies a semi-earth bermed curvilinear form, carefully planned to blend with the surrounding volcanic landscape. By prioritizing harmony with nature and enhancing the visitor experience, the structure offers both functional space and an appreciation of the environment.

Structural Form and Materiality

The two-story building relies on mass timber posts and beams for its structural support, ensuring a solid and durable form. The high-performance glass storefront allows natural light to flood the interior, promoting visibility to the stunning views outside. This design choice creates a strong connection between the inside of the building and the beauty of the landscape, making it feel open and inviting.

Passive Solar Design

At the core of the design is a trombe wall made from gabion baskets filled with local rock. This element plays a key role in managing the building's thermal performance while also harnessing solar energy. The substantial thermal mass stores heat during the day and releases it slowly at night, helping to maintain a comfortable environment. The trombe wall is intentionally lower than the ceiling, allowing clerestory windows to bring in light and enhance air circulation.

Functional Zones and Circulation

Inside, the Hverfjall Visitor Centre is thoughtfully divided into four separate areas, each serving a different purpose for guests. The upper level contains a coffee shop and a welcome desk, making it easy for visitors to check in. The lower level features restrooms and exhibition spaces with direct access to a central courtyard. This courtyard can host a variety of activities, from informal gatherings to educational displays related to the natural surroundings.

Design Integration with Landscape

The roof of the building slopes toward the central courtyard, aiding rain and snow runoff while keeping the design respectful of the natural ridgeline. Entry points are carefully placed to allow for smooth visitor flow, guiding people through the space while maintaining a sense of connection to the outdoor environment. Natural colors and textures within the interior design align with the local landscape, creating an atmosphere that encourages exploration and reflection.

Five wooden boxes serve as view portals, framing scenes of the landscape outside and providing heated seating areas. These nooks invite visitors to pause, enjoy warmth, and take in the surrounding beauty.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

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
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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