b'BE: How does the heritage conservation process differ from aor seismic upgrading. The second, most specifically in Vancouvers new construction project? Building Code, is the requirement for lower U-values. This requires a ZJ: Heritage conservation projects should start with appreciatingchange from single glazing and can be accommodated by retrofitting existing structures, materials and finishes and considering as littlenew thermal sash, either double- or triple-paned glazing with various change as possible. The problems usually surface when the buildinglow-e coatings, into existing restored jambs. The new sash is manu-is repurposed to something it has not been originally intendedfactured to match the existing historic sash and operate in the same for, which usually triggers many changes necessitating major codemanner. The third is the engineering and envelope requirements to upgrades. Along this process, many materials get changed, theprevent water leakage. Windows removed from an opening require building structure effectively becomes new and heritage values arethe openings to have various accommodations for new envelopes to mainly lost. When working with heritage buildings, a restrained andprevent water ingress, such as self-adhesive membranes and caulking, thoughtful approach always pays dividends to the owner and generaland to include methods to adhere the windows to the building.public with their authenticity, meaningfulness and cultural presence.ZJ: Our culture of new and the inherent expectation to comply DL: The attitude should be entirely different. We should start with,with ever-changing construction and different standards often makes What is already performing? and, How much can we save? ratherit difficult for people to be able to stand firmly behind the heritage than, How do we force this to meet code? This requires the entirevalue embedded in their buildings, which if lost would be lost forever project teams cooperation to solve problems rather than just defaultalongside all associated cultural values. Somehow, it becomes easier to typical solutions. to demolish and rebuild the site than to retain and upgrade the existing building. The latter is more environmentally, culturally and You have to be open to the fact that we cant start the project knowingeconomically sustainable, and yet we seem to have so many build-everything, as well. We need time to explore conditions and there willings demolished just to be replaced with newer versions of them-always be surprises, so the team has to be adaptable and collaborativeselves that could also be slated for demolition with the next change if we are going to be successful in conserving heritage values. of ownership. BE: Why is heritage conservation so important?KB: British Columbia is wonderfully peppered with historic buildings and a rich past. This rich past contributes to the economic viability of our province through tourism, entertainment and cultural retention, while at the same time creating jobs for thousands throughout the province. Heritage preservation allows our province to financially benefit while enabling us to learn from and respect our past. WhenAzon Saves Energyconsidering the entire life cycle of a building, it is a fact that the existing building is the greenest building.Daylighting systems ZJ: (Heritage conservation) represents the record of the time andproduced with Azon society that created them, showcasing community heritage values to be passed on to future generations. This provides a feeling ofstructural thermal barrier continuity of space and time in the city, which helps us relate to ourtechnologiesthe MLP past as we are approaching the future and to feel comfortable in theor Dual Cavityfor fast-changing environment of contemporary cities. Finally, heritage conversation creates livable and culturally sustainable communi- aluminum windows and ties. This is why it is important that our heritage represents diversecurtain wall, along with communities and values, and includes both tangible (buildings) andhigh performance glazing intangible assets, including Indigenous histories and cultural heritage. components for DL: Heritage is important to our communities as an anchor of memo- insulating glass, will yield ries, historical continuity and place-making. Heritage celebrates whata fenestration system makes our communities unique. It is a way to recognize our cultural achievements and provides tangible expressions of our cultural values.capable of upholding the Our collective community heritage is unique and irreplaceable.highest efficiency and sustainability standards.BE: What technical features tend to be common practice in older heritage buildings that often need to be changed or adapted for modern-day standards? Can anything be learnedContact us to learn about the from how older buildings were constructed? role of Azon thermal barriers KB: There are three major items that have been changed or adaptedin energy conservation.for modern-day standards. The first is that of safety; today, glass can1-800-788-5942 | www.azonintl.combe changed out to ensure it has guard rail strength, wind loading, FALL/WINTER 2020 19'