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Vaulted Roofs and Charred Timber in a Sustainable Retreat

Author:
Tom Kitson
Vaulted Roofs and Charred Timber in a Sustainable Retreat

Project in-detail

The distinctive vaulted roof and charred timber cladding blend with the Icelandic landscape to create a sustainable retreat that fosters a deep connection to nature.
5 key facts about this project
01
Vaulted roof design echoes the natural contours of the Icelandic landscape.
02
Radial layout enhances visitor flow and maximizes scenic views.
03
Charred timber cladding increases durability against harsh weather.
04
Green roof incorporates native flora, promoting local biodiversity.
05
Amphitheater-like ground level fosters a seamless indoor-outdoor connection.

Underland sits in the unique landscape of Iceland, designed to serve as a retreat for visitors while focusing on a strong connection to the environment. The design aims to blend with the natural terrain rather than stand apart from it. Through this approach, the project not only provides spaces for relaxation but also allows visitors to engage deeply with the surrounding beauty.

Design Concept

The building features a prominent vaulted 'shell' roof that conforms gracefully to the site's contours. This undulating shape mimics the natural forms found in the landscape, creating a profile that feels as if it belongs in the environment. Inside, spaces are arranged in a radial layout that promotes movement, guiding visitors with ease while offering views of the picturesque surroundings. Private areas are thoughtfully placed on the west side, ensuring privacy, while more public spaces are oriented towards open southern vistas.

Spatial Interaction

The design encourages interaction between indoor and outdoor areas. Inspired by the idea of an amphitheater, the ground level slopes down toward the entrances, which enhances the connection between the different spaces. As visitors move inside, the floor levels rise again, providing clear lines of sight from common areas like the café. This design ensures that even during busy times, the landscape remains a prominent feature, reinforcing the relationship between the structure and its beautiful setting.

Sustainability Initiatives

Sustainability is a key focus in Underland. A 'green roof' is incorporated, where native plants grow over the structure. This not only minimizes the impact on the existing ecosystem but also helps to support local biodiversity. By designing with sustainability in mind, the project demonstrates a commitment to protecting the natural environment around it.

Material Considerations

Materials used in the project are chosen for their durability and ecological impact. The building uses eco-concrete made from fly ash, which lowers CO2 emissions and provides strength suitable for Iceland's weather. Charred timber clads the retaining walls, adding texture and durability. The ceiling features curved plywood slats, which contribute to the interior's warmth while echoing the flowing forms of the landscape.

The structure's multi-layered roof extends outward, inviting views of the sky while reflecting the gentle rise and fall of the surrounding land.

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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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