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Reflective Glass Cabin with Underground Thermal Efficiency

Authors:
Sergio Homsy, Gabriel Andrea, Karim Jo Samaha
Reflective Glass Cabin with Underground Thermal Efficiency
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A reflective glass structure, partially submerged to optimize thermal stability and minimize visual disruption, serves as a sustainable retreat harmonizing with its forest environment.
5 key facts about this project
01
Reflective glass ensures minimal visual disruption while allowing natural light.
02
The cabin is partially submerged, enhancing thermal stability and energy efficiency.
03
A totem-like structure channels rainwater and supports diverse vegetation.
04
Heating utilizes a hypocaust system for efficient heat conduction throughout.
05
The design promotes sustainability through traditional lantern lighting methods.

"Concealed in the Woods" is located in the Baltic region of Latvia. The design serves as a retreat, focused on blending with the surrounding forest. The concept emphasizes a connection with nature while reducing visual impact. This is achieved through modern architectural techniques that reflect traditional styles.

Strategic Integration

The cabin features a double-pitched roof that reimagines the typical form of a cabin. Most of the structure is sunk more than halfway underground, effectively minimizing disruptions to the landscape. This method allows the building to take advantage of the Earth’s consistent temperature, providing warmth in the winter and cooling in the summer. Wind exposure is greatly reduced, resulting in a comfortable living space year-round.

Material Subtlety

A quarter of the structure rises above ground and consists of reflective glass. This choice of material allows natural light to enter freely, while also offering broad views of the forest. During winter, the glass helps create a greenhouse effect, warming the cabin when the trees lose their leaves. In contrast, it provides softer, indirect light during the summer months. These features align with the goal of energy efficiency while maintaining a strong connection to the environment.

Living Connections

Central to the design is a totem-like structure that serves as a key element within the landscape. This component connects the cabin to its setting, supporting various plants that grow around it. Additionally, the totem channels water through its core, directing it to a buried and filtered tank linked to the cabin. This design emphasizes sustainable water management practices and reinforces the relationship with nature.

Ecological Considerations

Heating is achieved through a "hypocaust," a system inspired by ancient Roman baths. This method allows for heat to be distributed through the floors and walls, keeping the space warm during colder months. The design relies on lanterns for lighting, moving away from electrical sources. This choice encourages traditional methods that are sustainable and promote a deeper connection to the natural world.

The cabin’s exterior features reflective surfaces that mirror the surrounding landscape, enhancing the experience of living within the forest. This design approach not only creates a retreat but also fosters a daily engagement with nature.

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Enter an open architecture
competition now

Denver Affordable Housing Challenge
Denver Affordable Housing Challenge
Affordable Housing Series 19th Edition
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Chair
The Architect's Chair
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100,000€ Prize / 2025

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

Open architecture competitions

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    Selected winning projects have the potential to be constructed
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    Experimental competitions with the focus on pushing the boundaries of creativity
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AIA (American Institute of Architects) invites you to design affordable housing in Denver

Affordable Housing Series 19th Edition ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 18 September 2025

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