Exhibitions can be an opportunity to extend architectural discourse beyond professional circles, opening conversations with broader publics and serving as an interface between architecture and society. Within this concept, major international events such as the Osaka International Expo 2025 and the Venice Architecture Biennale have adopted the idea of the circular economy as one of their organizational objectives. The idea of circularity in events can be reflected in, for example, their energy consumption, the impact of the displacement they generate, their waste, or the useful life of their infrastructure. The site destined for the last World Expo, held in Osaka from 13 April to 13 October 2025, was surrounded by a massive timber structure designed by Sou Fujimoto Architects, one of the world's largest wooden constructions. The Japan Association for the 2025 World Exposition committed to reusing building materials "as much as possible," with concrete plans for their reuse to be finalized by March. In the meantime, some relocation alternatives are already emerging for the pieces of the World Expo structure.
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Dornbracht Madison fittings for Brenners Park-Hotel & Spa in Baden-Baden. Image Courtesy of Dornbracht
During renovation projects, replacement is often preferred over refurbishment. Used fixtures are removed, new products specified, timelines secured. Particularly in hospitality projects, where closures are costly and operations are tightly scheduled, installing new components appears to be the most reliable solution. It is faster, easier to coordinate, and aligns with established workflows. Refurbishment operates differently. It requires careful dismantling instead of disposal, evaluation instead of substitution, and trust in the quality of what is already there. It introduces complexity into a process designed for efficiency.
The recent renovation of Brenners Park-Hotel & Spa in Baden-Baden demonstrates that under the right circumstances, this additional effort can become a deliberate architectural strategy for similar projects, especially when the original materials were never intended to be temporary.
Bolete Lounge BIO®. Image Courtesy of Andreu World
What is the current global outlook on the recyclability of materials used in architecture? To what extent are contemporary societies truly committed to reducing environmental impact? In the effort to live in balance with nature, replacing fossil fuels with renewable energy sources is one of the key strategies for cutting greenhouse gas emissions and addressing global warming. Looking to nature for inspiration as a way to protect it means creating designs that incorporate sustainability, circularity, and recyclability from the very first sketch. From building systems to surface finishes, the use of biomaterials in architecture reflects a mindset rooted in long-term responsibility for a material's full life cycle.
Louisiana Channel, a web TV platform based at the Louisiana Museum of Modern Art in Denmark, is launching a new film titled Søren Pihlmann: Make Materials Matter. Over the course of 54 minutes, Marc-Christoph Wagner and Simon Weyhe offer a glimpse into the work and mind of the founding architect of Pihlmann Architects, presenting his vision of Danish architecture, the practice of architecture itself, and, in particular, his sensitivity to materials. The film provides a behind-the-scenes look at the process and thinking behind the Danish exhibition at this year's Venice Architecture Biennale. Led by Søren Pihlmann, the team used the opportunity to renovate and conduct material research on Denmark's permanent building in the Giardini, transforming it into a material laboratory and experimental construction site. The result is a process exhibition that highlights how rethinking and reusing existing structures and materials can address critical architectural challenges. As of today, November 20, the documentary is available to watch online for free.
At voco Brussels City North, hansgrohe and Hydraloop unite for smarter water use. Image Courtesy of Hansgrohe
Water is the foundation of life. It shapes landscapes, regulates climates, and sustains every living organism. Yet on the only known inhabited planet, this essential resource faces a growing crisis: although 70% of Earth's surface is covered by water, less than 1% is actually available for human use. Most of it is consumed by agriculture and industry, while in households, activities like bathing and flushing use vast amounts of drinking water for non-essential purposes. The bathroom, therefore, has become a key space for innovation, where technology and design can help redefine how we use and reuse this vital element.
Like the famous Russian Matryoshka doll, opening a package often feels like uncovering endless layers. Inside a cardboard box, there might be molded Styrofoam, then several plastic air pillows, and finally, individual plastic wrapping around each piece. Even a small product can leave behind a trail of plastic waste far larger than its size. Now imagine this logic applied to a construction site where every component, every delivery of materials, often arrives wrapped in multiple layers of protection. What already seems excessive in retail becomes monumental when repeated daily on large construction projects.
ESPARTAL Pavilion / ELE Arkitektura, GA Estudio, Florencia Galecio, and Juan Gubbins. Image Courtesy of TAC! Festival de Arquitectura Urbana
The TAC! Urban Architecture Festival is held annually in Spain with the aim of bringing contemporary architecture closer to the public through installations in various cities, including Granada, San Sebastián, Valencia, Vigo, and San Fernando. Organized by the Ministry of Housing and Urban Agenda in collaboration with Fundación Arquia, the festival seeks to promote experimentation in architecture by constructing temporary pavilions for cultural events and gatherings. The 2025 edition of the festival will take place in two locations: Casa Mediterráneo in Alicante and Plaza Stagno in Las Palmas de Gran Canaria. The pavilions are selected each year through an open call for young architects up to 45 years old. This year's winners have already been announced: the ESPARTAL project by ELE Arkitektura, GA Estudio, Florencia Galecio, and Juan Gubbins; and DE ROCA MADRE by Alejandro Carrasco Hidalgo, Eduardo Cilleruelo Terán, Alberto Martínez García, and Andrea Molina Cuadro.
A new architecture and design exhibition opened on April 11, 2025, at the Danish Architecture Center in Copenhagen. Titled Recycle!, it explores recycling and reuse as a new way of creating, living, and building within the urgent context of the current climate crisis. The exhibition goes beyond presenting recycling and reuse as necessities; instead, it frames them as positive cultural shifts taking root in the construction industry and society at large. One of the exhibition's goals is to highlight the importance of resource awareness by posing the question: How can we increase the conservation, reuse, and transformation of what we already have?
MVRDV has recently completed Mega Mat, a temporary installation for public gatherings and performances made from recycled plastic mats. Created for Bangkok Design Week, the joint goal of the architects and the Thai Creative Economic Agency was to design a space that also raises awareness about plastic waste and recycling in Thailand. The result is an infographic public space that, in addition to featuring bright, eye-catching colors, follows a color-coded system to organize information about the country's plastic waste processing. Mega Mat takes recycled plastic to reinterpret an everyday household item: the Sua, or mat, on which Thai families have been sitting for generations. This fresh take on a familiar object showcases the potential of using recycled plastic in daily life, embodied in a versatile public space now installed in the heart of Bangkok.
The OBEL Award is an international prize for architectural practice, presented annually by the Henrik Frode Obel Foundation. The jury, composed of representatives from firms such as Snøhetta and MVRDV, alongside professionals from other disciplines, selects a theme to guide the choice of winners for each edition. The goal is to steer proposals toward solutions that foster dialogue and generate knowledge on emerging issues, aiming to promote architecture in service of social and ecological development worldwide. For its seventh edition, the 2025 call focus is Ready Made, targeting projects that place reuse and repurposing at the core of architecture for the common good.
Polyurethane (PU) started as a solution to a 1930s shortage, but today it's a key material in industries from insulation to cushioning. Invented in 1937 by Otto Bayer and his team in Germany, PU was originally designed as a cheap, versatile alternative to rubber. It quickly became popular in coatings and adhesives for its strong bonding and protective properties. PU is made by reacting polyols and isocyanates, which generates heat and, in the presence of expansion agents such as water or gases, creates bubbles that cause the material to expand, resulting in a foam with adjustable density and structure. Its flexibility allowed PU to revolutionize industries with products like insulation and padding. However, its durability and non-biodegradability have raised environmental concerns. To address this, companies like Purman are leading the charge in recycling PU waste, helping to reduce its environmental impact while promoting more sustainable alternatives.
Increasing urbanization, excessive waste production, excessive consumption of material goods, and exploitation of natural resources. There are many factors that contribute to the environmental impact of humans on Planet Earth. Scarcity of raw materials and the use of non-renewable resources is already the reality of some locations, and nature can no longer reclaim renewables at the same pace as it is exploited. The impact of human activities is so remarkable that scientists have pointed out that we are living in the new geological age of the Anthropocene (the Greek word for “the recent age of man”). The construction industry in particular is a major resource consumer and waste generator. In the European Union, the construction and use of buildings represents about 50% of all resource extraction and energy consumption, and about one third of all water consumption. [1] In 2014, 52% of all waste was attributed to the construction sector. [2].
Ladder Street Cultural Space. Image Courtesy of Francesco Rossini
As we near its 100th anniversary, expanded polystyrene (EPS) has become widely used in various industries and applications, especially in construction. Since 1970, EPS has been used in building construction due to its thermal insulation properties, lightweight closed-cell structure, durable strength, and long-term integrity. However, while these qualities make it highly useful and easy to recycle, they have also sparked debate due to recurring discussions about its degradation processes and environmental impact from various perspectives.
While the debate rages on, many improvements and alternative approaches have emerged around this material, highlighting that achieving sustainable construction involves using the right material for the right job from the outset. Thus, over time, innovations have brought new options for the recycling and use of EPS beyond traditional building applications such as infill blocks or partition panels. This demonstrates that rather than stigmatizing it as a problematic or “simple” material, it is essential to consider its qualities through design, technology, and developing methods for responsible and sustainable management.
https://www.archdaily.com/1018325/how-are-innovations-changing-expanded-polystyrene-epsEnrique Tovar
RUÍNA Arquitetura aims for greater socio-environmental awareness and the appreciation of materials while advocating for reuse as an alternative within the construction industry. In their practice, they explore new avenues for reclaimed materials, diminishing demolition waste and supplying construction materials with a reduced environmental footprint. In 2024, they were selected as part of ArchDaily’s 2024 Best New Practice for their unique attention to context, aiming to minimize its impact on the built environment through the effective reuse of materials and construction waste. Their participation in the 2023 Sharjah Architecture Triennale exemplifies how local ideas can achieve global recognition.
Plastic Island. Image Courtesy of Emily-Claire Goksøyr
As you read this, you may notice that you are surrounded by several items made of plastic. This omnipresence is no coincidence; the versatility of plastic has made it suitable for a variety of applications, and was described by its inventor—Leo Baekeland— as “the material of a thousand uses.” However, when it comes to environmental impact, the problem lies in its very qualities: it is so durable, adaptable, and easy to produce (430 million tons per year) that, according to UN data, the equivalent of 2,000 garbage trucks full of plastic are dumped into the oceans, rivers, and lakes every day.
In the built environment, plastic has been incorporated into various materials, products, and construction systems, contributing to an environmental crisis that seriously affects the well-being of millions of living beings. Faced with this problem, one possible direction is to shift away from utilizing it. The search for plastic-free alternatives is marking a path toward a future where architecture is progressively disassociating itself from these polluting materials, promoting sustainable solutions that reduce our dependence on it and contribute to preserving the environment.
https://www.archdaily.com/1016334/making-the-case-for-plastic-free-architecture-innovative-solutions-for-the-present-and-futureEnrique Tovar
Shigeru Ban Architects, in collaboration with The Glass House and The Irwin S. Chanin School of Architecture of the Cooper Union, have just revealed “Shigeru Ban: The Paper Log House at The Glass House.” This collaborative installation opened on April 15th and is on display until December 15th, 2024, welcoming more than 13,000 annual visitors. This year, students from The Cooper Union actively participated in the making of this structure as part of the university’s Building Technology Course.
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Turning waste into beautiful flooring. Image Courtesy of Bolon
In contemporary architecture, recycling has evolved from a desirable to an unavoidable necessity. This change is mainly due to the growing climate crisis, accentuated by the constant presence of waste (for which no use has been found beyond the initial one).
This approach has stimulated the creation of innovative materials to reuse waste in various contexts. A notable example is the case of woven flooring and rugs, where Bolon took a step forward in 1949 by transforming textile waste into stylish products. Since then, they have continued to innovate in materials, fusing the traditional flooring branch with sustainable creative design.
https://www.archdaily.com/1014951/walk-on-waste-weaving-waste-into-stylish-floorings-and-rugsEnrique Tovar
For a long time, the construction industry has followed a linear process - extract raw materials, build structures, demolish them, and then dispose of the garbage in landfills. This approach has serious negative effects on the environment and society and is inherently unsustainable. Reconsidering traditional methods and workflows requires support from all stakeholders and a sense of urgency proclaimed by authorities. In the United States, city organizations have begun to implement new policies to keep construction waste out of landfills and support circular practices. Several cities like Seattle and Pittsburgh, have started implementing deconstruction ordinances that require older buildings to be carefully deconstructed rather than demolished. How might their key provisions influence circular practices in the country?
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