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

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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.

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