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Recycled Materials and PIR Panels Transforming Historic Arches into Affordable Housing

Authors:
Jessica Hester, Anthony Cricchio, Dayton Castleman, Thomas Merritt
Recycled Materials and PIR Panels Transforming Historic Arches into Affordable Housing
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Using recycled materials and high-insulation PIR panels, the design repurposes historic rail viaduct arches into adaptable affordable housing units, addressing urban living challenges while preserving the architectural heritage of London.
5 key facts about this project
01
Transforms over 10,000 underutilized rail viaduct arches into functional living spaces.
02
Utilizes high-insulation PIR panels for energy efficiency and sound reduction.
03
Modular housing units are prefabricated off-site for rapid installation.
04
Accommodates household sizes from one to ten, allowing for diverse living arrangements.
05
Focuses on integrating affordable housing into historically significant urban areas.

The VIAdwell project serves as a practical solution to the urgent demand for affordable housing in the London Metropolitan Area. It focuses on reusing the existing rail viaducts, which are an important part of the city’s history. With more than 10,000 arches available, many of which are currently underused, the project aims to create functional living spaces that meet the needs of diverse residents.

Design Concept
The design centers on the idea of converting old rail arches into comfortable homes. By utilizing these existing structures, the project minimizes the need for new construction and its associated environmental impact. The goal is to create an effective response to housing shortages. This approach connects past and present, ensuring that the historical significance of the viaducts is maintained while providing modern housing solutions.

Materials and Construction
The focus on sustainability is evident in the choice of materials and building methods. Recycled materials are used throughout the project, supporting efforts to reduce waste and encourage responsible building practices. The housing units are constructed with PIR panels, which are known for their excellent insulation properties. This helps to keep homes energy-efficient and minimizes noise from the bustling urban environment.

Modular Housing Units
Each housing unit is designed to be modular, meaning they can be made off-site and quickly set up in their final location. This method allows for flexibility in how the spaces are arranged, making it possible to accommodate different household sizes. Options range from single individuals to larger families of six or more people in some cases. Each unit is tailored to fit the specific conditions of its arch, ensuring both comfort and functionality.

Community Integration
The VIAdwell project also focuses on integrating affordable housing into areas that have traditionally been out of reach for lower-income families. By doing so, it promotes diversity and inclusion in the urban landscape. The design includes features to support residents with mobility needs, showing a commitment to making housing accessible for everyone.

In sum, the project combines historical elements with modern requirements, creating a living environment that resonates with London’s past while serving its future. Each unit maintains a connection to the viaducts, preserving their character while providing valuable new homes to those in need.

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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.

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Celebrating your unbuilt architecture visions with a €100,000 prize

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