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Extensible Greenhouse With Reinforced Concrete and Rock Wool Insulation Serving Farm-to-Table Cuisine

Authors:
Simon Cebrian saiz, Almudena Alarcon ruiz, Patricia Perez ceres
Extensible Greenhouse With Reinforced Concrete and Rock Wool Insulation Serving Farm-to-Table Cuisine

Project in-detail

Located beside a volcano and utilizing an extensible greenhouse design with reinforced concrete and rock wool insulation, the restaurant fosters a direct connection to local agriculture while offering a farm-to-table dining experience.
5 key facts about this project
01
Utilizes an extensible greenhouse design to adapt as soil accumulates.
02
Emphasizes on-site cultivation for a direct farm-to-table experience.
03
Incorporates geothermal energy from nearby volcanic activity for operations.
04
Constructed with reinforced concrete walls for structural stability.
05
Features large windows to frame views of the Icelandic landscape.

HRAUN is a greenhouse restaurant located in Iceland, designed to connect the culinary experience with the natural surroundings. Positioned next to a volcano and a lake, the focus is on growing ingredients on-site. By doing so, diners have a direct relationship with what they eat, which highlights local agricultural practices and traditions.

Extensible Greenhouse

The design features an extensible greenhouse that adapts as soil gathers. This allows for year-round cultivation of fresh produce, which is essential for maintaining a sustainable source of ingredients. The layout supports the growth of various plants, inviting visitors to engage with the agricultural process.

Facilities Overview

HRAUN includes essential facilities that ensure smooth operation. It has systems for electricity, plumbing, drainage, and fire protection. Notably, geothermal energy is utilized, drawing heat from the earth’s natural sources. This choice of energy aligns with modern practices aimed at reducing environmental impact and promoting sustainability.

Interior Spaces

The interior is composed of various functional areas, including a multipurpose hall, kitchen, bar, café, and recreation areas. The arrangement of these spaces allows for ease of movement and encourages social interaction among visitors. Large windows are a key feature, providing abundant natural light and framing stunning views of the surrounding landscape.

Construction and Materials

Reinforced concrete walls, rock wool thermal insulation, and a steel roof make up the primary materials of HRAUN. These choices support the structure while also ensuring it is energy efficient, a critical factor given Iceland's changing weather conditions. The durability of these materials reflects a commitment to practical design.

The design also emphasizes the importance of nature in dining. By incorporating large windows, diners can fully appreciate the beauty of the Icelandic scenery while enjoying their meals.

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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
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