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Geothermal Integration and Lavacrete Cladding in a Sustainable Coffee House

Author:
Zechariah Fung
Geothermal Integration and Lavacrete Cladding in a Sustainable Coffee House

Project in-detail

Using Lavacrete cladding and cross-laminated timber, the design embraces the volcanic landscape while providing a sustainable gathering space for visitors to enjoy Iceland’s unique geothermal environment.
5 key facts about this project
01
Emphasizes geothermal integration through Earth-sheltered design.
02
Uses Lavacrete, crafted from local aggregates, for sustainable cladding.
03
Incorporates cross-laminated timber for rapid construction and energy efficiency.
04
Mimics traditional turf homes to connect with Icelandic architectural heritage.
05
Features large openings to enhance natural light and landscape views.

The Iceland Volcano Coffee Shop is located within Hverfjall, a large volcanic crater in northern Iceland. The site is characterized by its unique landscape formed by volcanic and geothermal activity, which has shaped its surroundings over time. The design of the coffee shop reflects a commitment to connect with this environment while drawing inspiration from the local architectural heritage. The building serves both as a gathering space for visitors and as a representation of the region’s cultural identity.

Architectural Inspiration
The design draws from traditional turf homes, known as Torfbaeir, which have deep historical roots in Iceland dating back to the Viking age. These homes were built using local materials, such as uncut stone and timber, and were designed to protect against the harsh Icelandic climate. The coffee shop reflects this traditional approach by using forms that integrate with the landscape, effectively minimizing its impact on the environment while enhancing thermal performance.

Materials and Sustainability
At the core of the design is the use of cross-laminated timber (CLT), a pre-fabricated building system that offers structural benefits and sustainability. CLT is the main framing material for the coffee shop, allowing for quicker construction and providing insulation that improves energy efficiency. The design of the panels helps maintain a comfortable ceiling height and contributes to overall energy-saving features.

Connection to the Landscape
The exterior of the coffee shop is clad with Lavacrete, a composite material developed on-site that blends well with the volcanic surroundings. This choice of material highlights environmental considerations, as it uses local aggregates sourced from the construction site. By doing so, the building reduces its carbon footprint and visually connects with the natural landscape.

Functional Layout
The layout of the coffee shop is thoughtfully designed to create clear areas for different activities, such as a reception space, coffee bar, and roasting section. This planning promotes easy movement throughout the building and enhances the overall experience for visitors. Large windows and openings allow plenty of natural light to enter, encouraging a connection with the landscape outside while creating a welcoming atmosphere.

The integration of these design elements allows the coffee shop to frame views of the surrounding crater, fostering a strong connection to the unique geological and cultural aspects of Hverfjall. Visitors can engage with the natural beauty of the area while enjoying a space that reflects both the past and the future of architecture in Iceland.

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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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