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Hempcrete Retreat with Spruce Framework in Lithuanian Forest

Authors:
Anna Lipiarz, Tomasz Jałocha, Yevheniia Krepysheva
Hempcrete Retreat with Spruce Framework in Lithuanian Forest
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Constructed with hempcrete and a spruce framework, the cabin in Lithuania integrates sustainable water and energy solutions to serve as a reflective retreat in a forested environment.
5 key facts about this project
01
Constructed with a natural hempcrete insulation for optimal environmental performance.
02
Utilizes a sloped roof designed for efficient rainwater collection.
03
Incorporates large glazing to enhance visual connection with the surrounding landscape.
04
Features a greywater system that supports local biodiversity with native plants.
05
Employs spruce wood for its durability and minimal ecological footprint.

The design features a self-contained cabin situated in a forested area of Lithuania. It serves as a peaceful place for contemplation and connection to nature. The cabin emphasizes sustainability and aims to minimize its impact on the environment. Its layout and design offer a blend of modern living conveniences while encouraging a close relationship with the natural world.

Design Concept

The cabin’s small footprint plays a critical role in reducing its ecological impact on the surrounding landscape. A sloped roof enhances its functionality by allowing for efficient collection of rainwater. This water is channeled into a tank and treated with reverse osmosis, making it safe for drinking. This method supports the idea of responsible resource management while providing essential water supply for occupants.



Energy Efficiency

Energy requirements are met through the integration of photovoltaic panels in the roof. These panels work with a Tesla Powerwall II accumulator to store solar energy for later use. This design ensures that the cabin operates independently, relying mostly on renewable sources. The choice to use solar energy highlights a commitment to sustainability while offering modern comfort.



Material Choices

Construction of the cabin uses spruce wood, known for its strength and sustainability. This choice aligns with the goal of creating a structure that functions well within its natural setting. Spruce wood not only offers durability but also promotes an environmentally friendly approach to building. Its properties contribute to a long-lasting structure that harmonizes with the landscape.



Interior and Exterior Integration

Large windows along the main elevation provide views of the Lithuanian countryside. These openings help blur the lines between the inside and outside, inviting nature closer to the living space. Ventilation is enhanced with adjustable blinds that allow occupants to control light and temperature effectively. This feature contributes to overall comfort inside the cabin, making it a suitable retreat.



The cabin also includes a greywater system that channels used water into an eco swamp filled with native plants. This system supports local ecosystems and demonstrates a commitment to environmental care. Its design reflects a thinking approach to living sustainably while enriching the natural habitat around it.

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Vancouver Tall Challenge: Building Higher Downtown

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Competition organisers

The Vancouver Tall Challenge: Building Higher Downtown is an international architecture competition organized by Buildner in collaboration with the City of Vancouver and the University of British Columbia’s School of Architecture and Landscape Architecture (SALA). The competition invites architects, designers, planners, and creative thinkers to explore innovative approaches to tall buildings in Vancouver’s downtown core, focusing on sustainability, livability, urban density, public space, and the city’s strong connection to nature. As Vancouver continues to grow, participants are challenged to rethink how vertical development can enhance urban life and contribute to a more vibrant, inclusive, and resilient city identity.

The competition offers a total prize fund of $15,000 CAD, with winning proposals selected by an international jury of architects, planners, academics, and city-building professionals. Key dates include the final registration deadline on October 29, 2026, submission deadline on November 30, 2026, and winners announcement on January 26, 2027. Full competition details, requirements, and registration information are available at architecturecompetitions.com/VancouverTallChallenge

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Final registration deadline 29 October 2026

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