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Cork-Finished Retreat Featuring Sustainable Maritime Pine and Biogas Systems

Authors:
Lars Vennix, Jurre Derks
Cork-Finished Retreat Featuring Sustainable Maritime Pine and Biogas Systems
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Constructed with maritime pine and incorporating biogas systems, the retreat emphasizes sustainability through rainwater harvesting and an elevated design that merges with its steep natural landscape, creating a space for reflection and relaxation.
5 key facts about this project
01
Constructed on a steep slope, preserving existing vegetation for ecological harmony.
02
Utilizes a biogas composting toilet, transforming waste into usable energy.
03
Features rainwater harvesting with two 800-liter storage tanks for water efficiency.
04
Large south-facing windows optimize passive solar heating throughout the year.
05
Elevated foundation allows for natural airflow and protects local flora and fauna.

Casa Pinus Pinaster is located in Vale de Moses, a site dominated by maritime pine. Designed as a retreat, it blends with its surroundings while providing a functional space for living. The concept revolves around a deep connection to nature, using local materials to lessen environmental impact. This approach creates a relaxing environment for occupants.

Design and Spatial Organization

Two separate volumes connect through a central deck, allowing for a continuous flow between indoor and outdoor areas. The deck serves multiple purposes, including yoga and relaxation, while the two living units offer privacy when required. A protective shell covers the deck, providing comfort from the weather and helping establish a tranquil atmosphere.

Sustainability Measures

The design incorporates rainwater harvesting, utilizing the roof to collect water into two 800-liter tanks. This system ensures a reliable water supply during dry periods, demonstrating effective resource management. A biogas composting toilet further enhances sustainability by turning waste into biogas for heating and compost for plants, supporting self-sufficiency and minimizing environmental effects.

Adaptability and Seasonal Use

The design allows for seasonal changes in use. During warmer months, the deck promotes outdoor activities, while sleeping areas can be closed off at night for privacy. A fireplace in the communal area extends the deck's use into cooler evenings. In winter, wall elements can be adjusted to change the deck into an indoor space, benefiting from passive heating provided by a central wood stove.

Natural Light and Materiality

Large windows enhance views and utilize natural light throughout the building. The south-facing openings collect passive solar energy, warming the interior in colder months, while overhangs help keep it cool when the weather is warmer. Specific materials mentioned include maritime pine shingles, expanded insulation corkboard, maritime pine plywood, maritime pine joists, maritime pine planks, and cork wall finishes. These choices support the design's connection to the local environment and align with its sustainability goals.

The careful placement of Casa Pinus Pinaster on the slope allows for the preservation of existing vegetation. This design illustrates a commitment to environmental sensitivity and a desire to work harmoniously with nature.

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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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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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