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Charred Wooden Shingles and Cross-Laminated Timber Envelop a Coastal Sauna Retreat

Charred Wooden Shingles and Cross-Laminated Timber Envelop a Coastal Sauna Retreat
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Constructed from cross-laminated timber and accented with charred wooden shingles, the coastal sauna integrates sustainable materials and modular design to provide a serene space for relaxation and wellness.
5 key facts about this project
01
Constructed using cross-laminated timber for reduced environmental impact and enhanced structural integrity.
02
Features charred wooden shingles that provide natural weather resistance and aesthetic appeal.
03
Incorporates an elevated design to minimize land disturbance and integrate with the coastal landscape.
04
Utilizes a modular construction approach for flexibility in assembly and potential expansions.
05
Designed to harness natural light through strategic window placements, enhancing the user experience.

### Overview

The project is located in the coastal area of Lauttasaari, Helsinki, and represents a modern reinterpretation of traditional Finnish sauna architecture. With a footprint of 25 square meters, it integrates sauna culture within a modular framework that adapts to various terrains and contexts while maintaining a focus on environmental stewardship and user experience.

### Spatial Strategy and Functionality

The design draws inspiration from the "Parturupa," a traditional sauna typology characterized by two distinct spaces: a bathing area and a changing room. This dual-functionality is preserved while enhancing overall utility and comfort. The interior layout encompasses a living room, kitchenette, shower area, and sauna, emphasizing flexibility and practicality. Natural light is abundant, thanks to strategically positioned windows and skylights, fostering an open and connected atmosphere within the dwelling.

### Material Innovation and Sustainability

The structure primarily utilizes cross-laminated timber (CLT), which not only provides strength but also facilitates lightweight assembly and transportation. Insulation made from wood and fiberglass enhances thermal performance, thereby promoting energy efficiency. The steel roofing contributes durability and supports the installation of rainwater harvesting systems, enhancing self-sustainability. Furthermore, the cabin incorporates solar panels for energy generation and systems for natural ventilation to promote indoor air quality. Designed for potential expansions, the structure allows for multiple units to be interconnected, fostering communal living while ensuring privacy. The vibrant red color of the exterior pays homage to traditional coastal cabins and integrates the design within its cultural context.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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