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Water-Reusing Home with Straw Roof and Open Layout

Authors:
Manuel Lara, Pol Aguilella, Ignacio Martínez
Water-Reusing Home with Straw Roof and Open Layout
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Constructed with a sloping straw roof that facilitates water reuse, this home features an open layout with strategically placed service areas, addressing local housing needs while embracing environmental sustainability.
5 key facts about this project
01
The design incorporates a sloping gable roof to enhance interior spatial perception.
02
Bathroom and kitchen placement on the sides optimizes central living space.
03
Straw and wood materials reflect local building traditions and cultural context.
04
Rainwater collection system integrated into the roof design promotes sustainability.
05
Large openings allow natural light and airflow, improving energy efficiency.

"Jacal" is an innovative housing solution located in Guatemala, designed to meet local needs for shelter. It draws inspiration from traditional building techniques while also embracing modern principles of sustainability. The focus on user participation in construction makes the design practical, allowing residents to engage in the building process. The overall concept is shaped by the climate of the region, creating a connection between indoor spaces and the natural environment outside.

Spatial Layout

The layout of Jacal features a thoughtful arrangement of spaces. The bathroom and kitchen are placed on either side of the home, opening up a large central area. This design choice encourages community interaction and enhances the feeling of openness. It limits unnecessary circulation spaces while ensuring that essential areas remain functional and comfortable, even in a compact structure.

Roof Structure

A distinct aspect of Jacal is its sloping gable roof. This roof design not only contributes to a sense of spaciousness within the home but also helps avoid feelings of tightness. Additionally, the roof is designed to capture and reuse rainwater through drainage pipes. This feature aligns with sustainable practices by promoting responsible water use in a region where water conservation is crucial.

Material Choices

The construction of Jacal relies on proximity materials, specifically straw and wood. These materials are significant for their practicality and connection to local traditions. By using materials sourced from the surrounding area, Jacal reflects the cultural context while also supporting environmentally friendly building habits. This choice further strengthens the bond between the home and its setting.

Sustainability Features

Sustainability plays a vital role in Jacal’s design. Solar panels are strategically placed on the roof, demonstrating a commitment to reducing the dwelling's impact on the environment. Natural ventilation and ample sunlight contribute to a comfortable living space. The integration of large openings enhances indoor lighting, creating a warm and inviting atmosphere that complements the outdoor lifestyle common in Guatemala.

Natural light flows generously through the open spaces, making the home feel bright and welcoming.

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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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