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Rainwater Collecting Coffee Shop with Folded Roof and Reinforced Concrete Walls

Authors:
Takeru Osato, Yuka Kobayashi
Rainwater Collecting Coffee Shop with Folded Roof and Reinforced Concrete Walls

Project in-detail

With a folded roof designed for rainwater collection and reinforced concrete walls for stability, the coffee shop seamlessly integrates traditional Icelandic architectural elements while providing a sustainable space for community interaction.
5 key facts about this project
01
Folded roof design facilitates efficient rainwater collection.
02
Reinforced concrete walls ensure structural stability in harsh weather.
03
Interior features movable partitions for adaptable use.
04
Natural lighting enhanced by strategically placed skylights.
05
Turf integration promotes ecological harmony with the environment.

The Folded-roof TURFHOUSE locates itself beside the Hverfjall volcano in Iceland, functioning as a coffee shop that aligns closely with the surrounding landscape. The design takes cues from traditional Icelandic turf houses and features a distinctive folded roof. This roof not only adds to the visual character of the building but also aims to meet various environmental requirements. Through a mix of practicality and sustainability, the design reflects the local conditions while providing a warm space for visitors.

Roof Design and Functionality

The folded roof is carefully designed to cope with the high winds common in the area. It also maximizes thermal insulation, ensuring comfort throughout different seasons. The roof's shape is significant for collecting rainwater, which is a vital resource in this landscape. By addressing both functionality and form, the design acknowledges the challenges that come with the local climate and seeks to overcome them effectively.

Materials and Structural Integrity

Reinforced concrete is used for the walls, while laminated veneer lumber (LVL) forms the beams. This choice of materials contributes to the building's overall stability. The reinforced concrete walls provide a strong foundation, and the LVL beams create open spaces inside by reducing the number of necessary support columns. This thoughtful approach allows for a more inviting atmosphere, accommodating a range of community-centered activities.

Interior Organization and Flexibility

Inside, the layout is designed for flexibility, featuring movable partitions that adjust to varying needs. This adaptability means the café can host different events and activities without limitations. Natural light enters the space through strategically positioned skylights, helping create a bright environment and minimizing the need for artificial lighting during the day.

Sustainability and Environmental Integration

An energy and waste circulation system is another important part of the design. It connects the local community’s needs with urban resources, promoting ecological awareness. Every aspect of the building focuses on environmental harmony. From the careful selection of materials to the efficient use of light and space, the design prioritizes both utility and respect for nature.

The grass-covered roof enhances the building's relationship with its volcanic surroundings. This not only improves insulation but also helps the structure blend into the natural landscape, reflecting local building traditions while addressing modern sustainability goals.

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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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