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Floating Timber Arches over Geothermal Fissures

Author:
Sean Lawler
Floating Timber Arches over Geothermal Fissures
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Floating above geothermal fissures, the combination of glue lam timber arches and lava rod supports creates a unique space that encourages both community interaction and personal reflection.
5 key facts about this project
01
Floating above the terrain, the structure utilizes glue lam timber arches for support.
02
Lava rod posts secure the design, anchoring it to the volcanic landscape.
03
The Troll Bridge features a sliding beam to accommodate geological shifts.
04
An open-air tower provides panoramic views of the surrounding fissures.
05
Multiple functional areas promote both community interaction and individual reflection.

CHASM is situated in the distinctive landscape of Grjótagjá, a fissure that lies between the continents of Eurasia and North America. The area is renowned for its thermal waters and rich folklore, featuring stories of trolls and Huldufólk. The design aims to blend the local mythology with the experience of visitors while promoting both community interaction and personal reflection. The overall concept emphasizes connectivity and the integration of architecture with the surrounding environment.

Design Concept

The idea behind CHASM focuses on using simple geometric forms to create a complex experience. The structure appears to hover above the volcanic rock, offering a floating effect that enhances the connection with the natural landscape. This elevation allows visitors to fully appreciate the views while exploring the varied spaces designed for both social engagement and quiet contemplation.

Structural Elements

The building relies on exposed glue lam timber arches for support. These arches provide both strength and visual interest, creating open areas that encourage interactions among visitors. To anchor the structure securely, lava rod posts are used, connecting the design to the unique geological features of the location. This method ensures stability and aligns the structure with the volcanic landscape.

Key Features

One unique element is the Troll Bridge, which spans the fissure and incorporates a sliding beam. This design allows for movements caused by geological changes while maintaining access for visitors. Additionally, the open-air tower acts as a lookout point, giving guests views of the stunning topography and showcasing the relationship between the natural and built environments.

Functional Spaces

CHASM includes various areas such as an atrium, dining facilities, and recreational spaces like a private spa and sauna. The arrangement of these spaces encourages movement and interaction while creating a welcoming atmosphere. Visitors can engage with the natural and cultural elements of Grjótagjá, as the design challenges traditional boundaries between indoor and outdoor spaces.

The design culminates in a gracefully curved observation tower. From this vantage point, visitors can take in the beauty of the fissures and geothermal features of the site, highlighting the connection between architecture and the vibrant landscape.

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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.

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