When we think about the buildings of tomorrow, the conversation often gravitates toward the ones that haven’t been built yet. But the vast majority of the spaces we learn in, heal in, and gather in are already standing, and the majority of them are struggling to keep up with today’s performance expectations.

Across towns and cities, a quiet story is gaining momentum in the buildings that already surround us: Schools from the 1970s, still fitted with their original glazing; Hospitals where aluminum frames, once celebrated as modern, now struggle to keep out the cold; Community centres where the glass has long since clouded over.

The solution? Retrofits! Extending a building’s overall lifespan without erasing its history, giving it the ability to meet today’s standards for comfort, efficiency, and resilience while continuing to serve their communities for decades to come, retrofits offer a clear and better way forward for so many buildings.

Reframing Retrofits

Curtain walls built in the mid- to late-20th century captured the optimism of their era. They were designed to bring light, openness, and civic identity to schools, hospitals, and community buildings across the country. But they were also limited by the materials of the time. Aluminum frames carried heat out in winter and let it in during summer. Glazing that once seemed advanced has naturally degraded with time and is now far below current thermal expectations, and preventable moisture issues have eroded both comfort and durability.

Of course, buildings are never static. Over decades, they take on new meanings, becoming backdrops to daily life and repositories of collective memory. So when façades begin to fail, the choice isn’t necessarily between clinging to the past or starting over. The real opportunity lies in adding to the story already in place.

Retrofits make that possible. By replacing failing aluminum-framed systems with fibreglass-framed curtain walls, buildings can hold onto the transparency and presence that defined their original design while quietly solving their decades-old shortcomings. The results are immediate: clearer views, steadier comfort, healthier environments for the people inside, and reduced demands on operators tasked with keeping older building running. At the scale of municipalities and institutions, the benefits compound — decades of additional service life, lower energy use, and avoided carbon costs from demolition and rebuild.

In this sense, retrofits are less of a compromise and more of a strategy for progress — extending the cultural and architectural value of existing buildings while aligning them with the climate and fiscal responsibilities of the present, and the future.

Case Study: Inner City High School, Edmonton

When it opened in 1976, Inner City High School’s design by Peter Hemingway embodied a spirit of creativity and openness,  qualities that still define the school today. With its angular geometry and light-filled gymnasium, the building stood apart as an unconventional learning environment, reflecting the school’s mission to support students in finding stability and belonging.

Nearly fifty years later, the façade was showing its limits. Drafts and fogged panes had become familiar, while aging aluminum frames no longer met basic standards for comfort or efficiency. For a school devoted to creating safe and supportive space, the building itself was falling behind.

Working with Reimagine Architects, GlasCurtain helped renew the building without erasing its architectural character. Our Thermaframe 8 fibreglass-framed curtain wall system paired with Vacuum Insulated Glass (VIG) to dramatically reduce heat loss, eliminate interior moisture buildup, and withstand Edmonton’s harsh winters. The retrofit extended the building’s service life while preserving Hemingway’s vision, ensuring that the design continues to shape how students experience the space today.

The impact is tangible. Classrooms are brighter, indoor conditions are steadier, and views remain clear through high-performance glazing. For administrators and funders, the retrofit also means reduced energy costs, less maintenance, and alignment with ambitious climate targets.

In many ways, the retrofit safeguarded a piece of Edmonton’s architectural history while making the school brighter, more comfortable, and more efficient for the students who use it every day.

Materials That Change the Equation

Retrofits often take place under less-than-ideal conditions. Buildings remain occupied, budgets are scrutinized, and timelines leave little room for error. In this context, material choice becomes more than a technical detail, it determines whether the retrofit adds stability or introduces new risks.

Aluminum, once the default for curtain walls, carries well-known liabilities: frames that expand and contract with temperature swings, surfaces that sweat and corrode, and embodied carbon levels that clash with today’s climate goals. These risks translate into higher maintenance costs, unexpected failures, and performance gaps that undermine the very purpose of the retrofit.

Fibreglass removes many of these uncertainties with thermal stability to keep façades tight through harsh winters and hot summers, ensuring long-term air and water resistance. Its durability means fewer callbacks and less upkeep, even in demanding public-sector environments. And with substantially lower embodied carbon, fibreglass aligns retrofit projects with the funding frameworks and climate commitments driving today’s infrastructure decisions.

Because GlasCurtain systems are manufactured entirely in Canada, they also avoid the unpredictability of global supply chains — no tariffs, no shipping delays, no compromises in quality. For owners and architects, that reliability results in projects that stay on schedule and perform as promised.

Retrofits are too important to gamble on. With fibreglass, the material equation shifts from managing risk to delivering certainty — certainty in resilience, in durability, and in the long-term value of the building itself.

Writing the Next Chapter…

Every retrofit is, in its own way, an act of stewardship. It acknowledges the architectural value of a building while preparing it for new generations of use. At Inner City High School, that meant respecting Peter Hemingway’s design while renewing the building to be healthier, more efficient, and better equipped for Edmonton’s climate. Elsewhere, it may mean strengthening mid-century civic infrastructure or upgrading healthcare facilities that serve thousands daily. Whatever the context, the outcome is consistent: buildings that continue to serve their communities, renewed for modern expectations of comfort, efficiency, and durability.

Retrofits remind us that progress doesn’t always require starting over. Sometimes, the most sustainable path forward is improving what we already have, adding to the history of a building, rather than replacing it.