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Polyhedral Crystal Roof Constructed with Locally Sourced Timber and Geothermal Energy Utilization

Polyhedral Crystal Roof Constructed with Locally Sourced Timber and Geothermal Energy Utilization
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Constructed with a polyhedral crystal roof to optimize natural light and energy efficiency, this facility integrates geothermal resources and locally sourced materials to create a multifunctional space dedicated to wellness and community engagement.
5 key facts about this project
01
Polyhedral crystal roof structure enhances energy efficiency while maximizing natural light.
02
Central Trunk Frame design allows for flexible spatial configurations and multifunctional use.
03
Geothermal energy systems integrated for sustainable heating and cooling throughout the facility.
04
Local sourcing of materials minimizes environmental impact and supports regional craftsmanship.
05
Integrated gardens utilize geothermal heat for year-round cultivation of local flora.

## Overview

Located in Iceland, the "Tropism Phyllotaxis" project engages with the country's dynamic landscape of fire and ice, integrating architectural design with the natural environment. This undertaking emphasizes a comprehensive approach that incorporates local cultural elements, natural energy sources, and an intent to enhance community and wellness. Designed to facilitate interaction with the serene surroundings, the building is strategically positioned to provide optimal views of Lake Mývatn and other significant natural features.

### Material Selection and Sustainability

Material choices reflect both local conditions and ecological considerations, supporting a sustainable design ethos. Wood, chosen for structural framing and finishes, fosters warmth and aligns with environmentally responsible practices. Glass is employed across facades and roofs, maximizing natural light and maintaining visual connections to the landscape. Structural integrity is achieved through the use of steel in the truss systems, while thermal insulation materials, such as extruded polystyrene, enhance energy efficiency. Concrete provides foundational stability, complemented by metal roofing to withstand Iceland's environmental challenges.

### Spatial Configuration and Structural Design

The architectural composition features a polyhedral "Crystal Roof," characterized by angular forms that respond to solar and wind patterns. This innovative roof element not only optimizes sunlight penetration but also offers expansive panoramic views. Central to the design is the "Trunk Frame" system, which organizes functional spaces around a core area. This nucleus includes a brewery that reflects local food and drink culture, as well as gardens heated by geothermal energy, promoting year-round access to fresh produce. Therapeutic areas designed for wellness activities further leverage Iceland's natural healing attributes, reinforcing an overall commitment to community health and environmental integration.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025

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