Appalachian State Solar Decathalon Europe
Appalachian State Solar Decathlon going to Europe. They brought American green-building innovation to an international stage in 2014. Appalachian State University partnered with the University of Angers in France to develop Maison Reciprocity, an energy-positive housing concept built around efficiency, solar power and practical construction methods.
Moreover, the project showed how sustainable housing ideas could cross borders and adapt to different climates, building codes and lifestyles. Maison Reciprocity focused on more than producing renewable electricity. The team also emphasized airtight construction, strong insulation, efficient mechanical systems and thoughtful material choices. As a result, the concept demonstrated how universities could combine architectural design with building science to create homes that produced more energy than they consumed for the Appalachian State solar decathlon work.
Appalachian State Takes on Solar Decathlon Europe
Bethesda, MD, March 6, 2014 – The Polyisocyanurate Insulation Manufacturers Association (PIMA) announced today that it has signed on as a Kilowatt Level sponsor of Appalachian State University’s entry to the Solar Decathlon Europe 2014.
Maison Reciprocity Focused on Efficiency
Appalachian State University (Appalachian) is one of only three U.S. universities selected to participate in the prestigious Solar Decathlon Europe 2014. It’s an international competition inspired by the U.S. Solar Decathlon that challenges student teams to design and build an energy-independent solar house. Twenty projects were selected for the competition out of a total of 44 candidacies from 23 countries.
Polyiso Helped Reinvent the Traditional Row House
Maison Reciprocity took a familiar housing design and pushed it toward a more efficient future. Instead of abandoning the traditional row house, the Appalachian State Solar Decathlon team looked for practical ways to improve its energy performance.
“Using effective and accessible products in Maison Reciprocity such as polyiso allows our team to dramatically improve upon the beloved row house typology without radically changing the norm in terms of products and systems,” said Scott Hopkins, graduate construction manager at Appalachian State University for the Solar Decathlon. “With a continuous layer of polyiso wrapping the building envelope, we can let more natural daylight into a traditionally long, narrow row house without sacrificing thermal performance.”
That approach mattered because row houses often present unique energy challenges. Their long and narrow layouts can limit daylight. Meanwhile, the building envelope must control heat loss and heat gain without sacrificing usable interior space.
Therefore, the team used insulation as an integral part of the architecture rather than treating it as an afterthought.
Appalachian State Partnered With the University of Angers for the Solar Decathlon
Appalachian State University partnered with the University of Angers in Angers, France, to develop the project for the Solar Decathlon. Together, the schools formed Team Réciprocité.
The international collaboration combined American and French approaches to architecture, construction and energy efficiency. Moreover, the partnership showed how universities could share sustainable-building ideas across national borders.
Team Réciprocité planned to present Maison Reciprocity for Appalachian State at the Solar Decathlon Europe in Versailles, France, from June 27 through July 14, 2014.
The project centered on an energy-positive housing concept. In other words, the team wanted the building to produce more energy than it consumed while still offering a practical and comfortable place to live.
Polyiso Insulation Played a Major Role
Team Réciprocité focused on affordable solutions and practical technologies that could improve the building throughout its lifecycle.
Polyisocyanurate, commonly called polyiso, played a major role in that strategy. The rigid foam insulation allowed the designers to add continuous insulation around the structure. Consequently, the team could reduce thermal bridging and strengthen the overall building envelope.
The Appalachian State Solar Decathlon project also used cross-laminated timber, or CLT, as a primary structural system. Designers developed Maison Reciprocity around modular and panelized components that could be flat-packed for easier transportation and assembly.
That combination brought several sustainable-building strategies together. CLT provided the structural framework, while continuous insulation helped improve thermal performance. Modular construction also offered the potential to reduce construction waste and simplify installation.
Building Efficiency Into the Structure
“Maison Reciprocity will feature the latest in building systems technology as well as incorporate one of the most energy efficient insulation products available today, polyiso,” said Jared O. Blum, president of the Polyisocyanurate Insulation Manufacturers Association, or PIMA.
Blum also emphasized the insulation industry’s interest in net-zero-energy construction.
“Our sponsorship underscores the polyiso industry’s commitment to net zero energy buildings — where the future of construction lies,” he added.
For Maison Reciprocity, however, insulation represented only one part of a broader efficiency strategy. The team designed the structure, envelope, renewable-energy systems and living spaces to function together.
As a result, energy efficiency became part of the building’s basic architecture rather than an upgrade added later.
A Scalable Energy-Positive Housing Concept
Maison Reciprocity also aimed to provide flexibility.
Designers envisioned a system that could adapt to different sites, communities and owners while maintaining strong energy performance. The final concept reimagined the familiar row house as a multistory, multi-unit building capable of operating with a high degree of energy independence.
That scalability gave the Appalachian State Solar Decathlon project relevance beyond the competition itself. Instead of designing a one-off demonstration house, Team Réciprocité explored construction techniques that builders could potentially adapt for other residential developments.
Meanwhile, the recognizable row-house form helped connect advanced green-building technology with an established urban housing model.
Atlas Roofing Supplied Continuous Insulation
PIMA member Atlas Roofing Company also sponsored Team Réciprocité and supplied insulation for Maison Reciprocity.
The project used Atlas Rboard polyiso as its primary insulation material. Four inches of rigid polyiso provided continuous insulation over portions of the CLT and conventional wood-framed walls.
Continuous exterior insulation can strengthen a high-performance building envelope because it reduces the thermal bridges created by framing members. Therefore, the insulation strategy helped Team Réciprocité pursue greater efficiency without completely reinventing conventional construction practices.
It also supported one of the project’s central ideas: sustainable housing does not always require unfamiliar materials or radical building techniques. Builders can sometimes achieve major improvements by using established products more strategically.
Solar Decathlon Europe Put Green Building on Display
The Team for the Appalachian State Solar Decathlon Europe gave university teams an international platform to demonstrate what highly efficient housing could achieve.
The 2014 competition took place near the Château de Versailles in France from June 27 through July 14. Teams designed and constructed homes that combined architecture, engineering, renewable energy and energy efficiency.
For Appalachian State and the University of Angers, Maison Reciprocity represented more than a Solar Decathlon competition entry. The project offered a working example of how solar power, advanced insulation, engineered timber and modular construction could come together in a recognizable residential design.
Ultimately, Maison Reciprocity showed that the future of sustainable housing did not necessarily require abandoning the past. Instead, designers could take a proven housing form, improve its building envelope and integrate renewable energy to create a home better suited for a low-carbon future.
Sources: Maison Reciprocity and the Polyisocyanurate Insulation Manufacturers Association (PIMA)
Conclusion: Student Design Meets Real-World Green Building
The Appalachian State Solar Decathlon Europe project showed why student competitions matter. They turn clean-energy ideas into real buildings, test new materials and push universities to solve practical design problems.
Maison Reciprocity also reinforced a lesson that still matters today: better insulation, efficient construction and renewable power work best when they are designed together from the beginning.
For more green-building ideas, see our Solar Decathlon coverage.
