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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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Kingspan MICROHOME 2026: Building Less to Create More

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Competition organisers

The Kingspan MICROHOME 2026 competition invites architects and designers worldwide to rethink small-scale living by creating an off-grid, modular micro dwelling under 25 m². Now in its 11th edition, the contest emphasizes sustainable, innovative, and human-centered design that demonstrates how compact living can have a big impact.

With a €100,000 prize fund, entries will be evaluated for originality, efficiency, and their response to contemporary environmental and social challenges. The competition is open to everyone, with submissions allowed individually or in teams of up to four. Registration closes on 30 September 2026, and winners will be announced on 15 December 2026.

By celebrating creativity within strict limits, MICROHOME 2026 continues to push the boundaries of compact architecture and sustainable living.

MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 September 2026

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