Dear Readers,
When I started Rejuvenation in 1977 the business was all about recycling. Almost everything we sold was old. We salvaged stuff and then sold it to customers who were “recycling” old houses. Getting into the business was not a simple accident. The whole idea of re-use, of both stuff as well as old structures, was, and still is, something that energized me, and a reflection of my core values.
However with all the talk these days about sustainability, I have been bothered by a seeming disconnect when it comes to historic preservation. To me, saving and restoring an old house is a prime example of sustainability, at its core. But few in the historic preservation world talked about it that way. And my perception is that few old home renovators see themselves, simply by the act of owning and renovating an old house, as doing the “right” thing, like others do when they buy a Prius.
Is renovating an old house more sustainable than building new? This is something that has been debated, but few facts were available to back up intuitions. Now we know the answer, and it is a pretty darn clear yes. Another common preconception has been that the greenest new houses are better for the environment because they are more energy efficient. But not so fast - new research doesn’t back up that assumption.
Personally, I am thrilled that we now have research that backs up what in the past have just been intuition-based assumptions on my part. This new research comes from Don Rypkema, who has focused on the connections between green buildings, sustainability, and historic preservation.
Richard Moe, President of the National Trust for Historic Preservation, gave a speech in Portland, based in large part on Mr. Rypkema’s work. In his role as President of the National Trust, Richard Moe has been an influential spokesman not just for historic preservation, but for smart growth, livable communities, and now sustainable ones too.
I was impressed by what he said and borrow here directly from Dr. Moe’s speech. After his introductory remarks and a bit about the history of historic preservation in America, his speech focused on the connection between preservation and sustainability.
“… Some things haven’t changed: We’re still saving iconic buildings, ranging from the Pioneer Courthouse here in Portland to Philip Johnson’s Glass House in Connecticut. Our work is still rooted in a respect for history. But today, more than ever before, it is as much concerned with building the future as with holding on to the past.”
This concern with the future is at the core of the new phase that preservation is entering right now: As growing numbers of people are worried about climate change, the degradation of the environment, and our relentless consumption of energy and irreplaceable natural resources, it is increasingly apparent that preservation has an essential role to play in any effort to deal with the environmental crisis that looms over us. Because it necessarily involves the conservation of energy and natural resources, historic preservation has always been the greenest of the building arts. Now it’s time to make sure everyone knows it.
It’s all about sustainability.
Up to now, our approach to life on this planet has been based on the assumption that “there’s plenty more where that came from.” With our environment in crisis, we have to face the fact that there may not be “plenty more” of anything – except trouble. In the face of that realization, we’re challenged to find a way of living that will ensure the longevity and health of our environmental, economic, and social resources.
The latest report from the UN Intergovernmental Panel on Climate Change was released a couple of months ago, and it is deeply sobering. The report states that “warming of the climate system is unequivocal” and is the result of human activities.
The United States is a big part of the problem. We have only 5% of the world’s population, but we’re responsible for 22% of the world’s greenhouse gas emissions, which are the leading cause of climate change. Much of the debate on this subject usually focuses on the need to reduce auto emissions. But according to the EPA, transportation – cars, trucks, trains, airplanes – accounts for just 27% of America’s greenhouse gas emissions, while 48% – almost twice as much – is produced by the construction and operation of buildings. If you remember nothing else I say tonight, remember this: Nearly half of the greenhouse gases we Americans send into the atmosphere comes from our buildings. In fact, more than 10% of the entire world’s greenhouse gas emissions is produced by America’s buildings. The current debate on climate change does not come close to reflecting that huge fact, but it’s clear that any solution to climate change must address the need to reduce emissions by being wiser about land use and smarter about how we use our buildings.
I’m not so naïve as to believe that preservation represents the way out of this environmental crisis. But I do believe that historic preservation can be – and must be – a key component of any effort to promote sustainable development. Indeed, preservation is sustainability.
The connection between historic preservation and sustainability is not a new concept. It’s something that many people in the preservation community have believed and talked about for many years. They understand that preservation is “the ultimate recycling.” As long ago as 1980, before the word “sustainability” came into widespread use, the National Trust issued a Preservation Week poster that featured an old building in the shape of a gas can – a reminder that reusing an existing building, instead of demolishing it and replacing it with a new one, is one good way to conserve energy.
Much has changed since that poster appeared almost 28 years ago. The stakes have gotten much higher. Climate forecasts, meteorological reports, population growth projections, rising energy costs, dwindling reserves of water and fossil fuels, even the daily news headlines – they all warn us that we can’t wait any longer for “somebody” to figure out what to do. The “somebody” we need is us, and the need is clearly urgent.
The challenge is to help people understand that preservation, by its very nature, is sustainability. To address that challenge, I want to share my views on preservation’s essential role in fostering development that is environmentally, as well as economically, sustainable.
The key phrase is “sustainable stewardship.”
The retention and reuse of older buildings is an effective tool for the responsible, sustainable stewardship of our environmental resources – including those that have already been expended. I’m talking about what’s called “embodied energy.”
Here’s the concept in a nutshell: Buildings are vast repositories of energy. It takes energy to manufacture or extract building materials, more energy to transport them to a construction site, still more energy to assemble them into a building. All of that energy is embodied in the finished structure – and if the structure is demolished and landfilled, the energy locked up in it is totally wasted. What’s more, the process of demolition itself uses more energy – and, of course, the construction of a new building in its place uses more yet.
Let me give you some numbers that will translate that concept into reality.
- According to a formula produced for the Advisory Council on Historic Preservation, about 80 billion BTUs of energy are embodied in a typical 50,000-square-foot commercial building. That’s the equivalent of 640,000 gallons of gasoline. If you tear the building down, all of that embodied energy is wasted.
- What’s more, demolishing that same 50,000-square-foot commercial building would create nearly 4,000 tons of waste. That’s enough debris to fill 26 railroad boxcars – a train nearly a quarter of a mile long, headed for a landfill that is already almost full.
- Once the old building is gone, putting up a new one in its place takes more energy, of course, and it also uses more natural resources and releases new pollutants and greenhouse gases into our environment. When you see a construction crane on the Portland skyline, consider this: It is estimated that constructing a 50,000-square-foot commercial building releases about the same amount of carbon into the atmosphere as driving a car 2.8 million miles.
- One more point: Some people argue that all the energy used in demolishing an older building and replacing it is quickly recovered through the increased energy efficiency of the new building – but that’s simply not true. Recent research indicates that even if 40% of the materials are recycled, it takes approximately 65 years for a green, energy-efficient new office building to recover the energy lost in demolishing an existing building. And let’s face it: Most new buildings aren’t designed to last anywhere near 65 years.
Despite these surprising statistics and many more like them, we persist in thinking of our buildings as a disposable – rather than a renewable – resource.
A report from the Brookings Institution projects that by 2030 we will have demolished and replaced 82 billion square feet of our current building stock, or nearly 1/3 of our existing buildings, largely because the vast majority of them weren’t designed and built to last any longer.
That much demolition will create a lot of debris. If we didn’t recycle any of the building materials, we’d be left with 5.5 billion tons of waste. That’s enough debris to fill almost 2,500 NFL stadiums.
How much energy will it take to demolish and replace those buildings? Enough to power the entire state of California for 10 years. On the other hand, if we rehabbed just 10% of these buildings, we would save enough energy to power the state of New York for well over a year.
Instead of focusing on generalities, let’s look at a specific building.
The Portland Armory has approximately 55,000 square feet of space, enclosed and decorated by a lot of stone and bricks and iron and wood. When you consider how much energy it took to extract or manufacture all those materials, then transport them to this site and put them all together, the total embodied energy in this building is the equivalent of more than 700,000 gallons of gasoline. If we assume the average vehicle gets about 21 miles to the gallon, that means there’s enough embodied energy in this building to drive a car about 15 million miles.
All of that energy would be wasted if this building were to be demolished and landfilled. It all comes down to this simple fact: We can’t build our way out of the global warming crisis. We have to conserve our way out. That means we have to make better, wiser use of what we’ve already built.
Anthropologist Ashley Montagu has said that the secret to staying young is to die young – but the trick is to do it as late as possible. All over the United States, people are showing that old buildings put to new uses can stay young to a ripe old age. If that’s not sustainability, I don’t know what else to call it.
Still, too many people just don’t see the connection. They don’t yet understand that preservation must be an integral part of any effort to encourage environmental responsibility and sustainable development.
The UN report that I quoted a bit earlier, for instance, doesn’t stress the importance of reusing the buildings we have. Similarly, most recent efforts by the green community place heavy emphasis on new technologies rather than on tried-and-true preservation practices that focus on reusing existing buildings to reduce the environmental impacts associated with demolition and new construction. The most popular green-building rating system, the Leadership in Energy and Environmental Design, or LEED program developed by the U. S. Green Building Council, was designed principally for new construction – underscoring the fact that words like “rehabilitation” and “reuse” haven’t had much resonance in the green-building lexicon.
This emphasis on new construction is completely wrong-headed. All available statistics tell us clearly that buildings are the problem – but incredibly, we propose to solve the problem by constructing more and more new buildings while ignoring the ones we already have.
Here’s what we have to keep in mind: No matter how much green technology is employed in its design and construction, any new building represents a new impact on the environment. The bottom line is that the greenest building is one that already exists.
It’s often alleged that historic buildings are energy hogs – but in fact, some older buildings are as energy-efficient as many recently-built ones, including new green buildings. Data from the U.S. Energy Information Agency suggests that buildings constructed before 1920 are actually more energy-efficient than buildings built at any time afterwards – except for those built after 2000. Furthermore, in 1999, the General Services Administration (GSA) examined its buildings inventory and found that utility costs for historic buildings were 27% less than for more modern buildings.
It’s not hard to figure out why. Many historic buildings have thick, solid walls, resulting in greater thermal mass and reducing the amount of energy needed for heating and cooling. Buildings designed before the widespread use of electricity feature transoms, high ceilings, and large windows for natural light and ventilation, as well as shaded porches and other features to reduce solar gain. Architects and builders paid close attention to siting and landscaping as tools for maximizing sun exposure during the winter months and minimizing it during warmer months.
Unlike their more recent counterparts that celebrate the concept of planned obsolescence, most historic and many other older buildings were built to last. Their durability gives them almost unlimited “renewability” – a fact that underscores the folly of wasting them instead of recognizing them as valuable, sustainable assets.
I’m not suggesting that all historic buildings are perfect models of efficient energy use – but, contrary to what many people believe, older buildings can “go green.” The marketplace now offers a wide range of products that can help make older buildings even more energy-efficient without compromising the historic character that makes them unique and appealing. And there’s a large and growing number of rehab/reuse projects that offer good models of sustainable design and construction. We’re sitting in one of them right now: The Portland Armory is the first building on the National Register of Historic Places to receive Platinum LEED certification. I’m confident that it won’t be the last.
More recent buildings – especially those constructed between the 1950s and 1980s – pose a greater challenge. Many of them were constructed at a time when fossil fuels were plentiful and inexpensive, so there was little regard for energy efficiency. In addition, they often include experimental materials and assemblies that were not designed to last beyond a generation.
Today, these buildings make up more than half of our nonresidential building stock. Because of their sheer numbers, demolishing and replacing them isn’t a viable option. We must find ways to rehabilitate these buildings and lighten their environmental footprint while still protecting their architectural significance. This is a challenge that preservationists and green-building advocates must face together in the coming years.
I believe that climate change is the defining issue of our time – and will be for a long time to come. What’s at stake is nothing less than life as we know it on this planet. The fact that the threat is not immediate does not mean that it’s not urgent. The experts tell us we have no time to lose. The debate is over, the facts are in, and it’s time to act.
Today, most of the important and innovative work on this issue is being carried out by state and local governments and the private sector. Precious little leadership is being offered by the federal government, which isn’t even doing much to promote and coordinate fundamental research.
Because this issue cuts across every social, geographic and political boundary, we simply can’t hope to bring effective direction to it without strong national leadership. What we need is a federal effort, preferably at the cabinet level, incorporating a significantly strengthened Environmental Protection Agency and relevant parts of the Department of Energy and other federal entities. This new agency should be given a mandate that recognizes climate change as a threat to our survival as great as terrorism and that commits the nation to combating it with every resource available. It should be the environmental equivalent of the Department of Homeland Security.
One of the first and most important things that must happen is a thoroughgoing revision of current government policies that foster unsustainable development.
For decades, national, state and local policies have facilitated – even encouraged – the development of new suburbs while leaving existing communities behind. As a result, an ongoing epidemic of sprawl ravages the countryside, devouring open space, consuming resources and demanding new infrastructure. Look at almost any city in the country, and you’ll see new houses springing up in rural areas that are underserved by roads and public services – while in the urban core, disinvestment has left viable housing stock abandoned in areas where infrastructure is already in place, already paid for.
It makes no sense for us to recycle newsprint and bottles and aluminum cans while we’re throwing away entire buildings, or even entire neighborhoods.
This pattern of development is fiscally irresponsible, environmentally disastrous, and ultimately unsustainable. To replace it, we need federal policy that directs growth to existing communities. You’ll note I said “federal policy.” While land-use planning has traditionally been a function of state and local government, it’s an indisputable fact that where the federal government chooses to spend its money – our money – has a huge impact on local planning and development. We need federal policy that stops rewarding unsustainable development. We need policy that maximizes wise use of existing resources by enhancing the viability and livability of the communities we already have.
We have a choice: We can do nothing for a while longer – until the realities of climate change, the disappearance of irreplaceable resources, and soaring energy costs force us to take action. Or we can take steps now to develop a smart, sustainable development ethic and the policies that will support it.
Among other things, we need incentives to encourage reuse and energy upgrades in older buildings. Over the past ten years alone, historic tax-credit incentives have sparked the rehab of more than 217 million square feet of commercial and residential space – and in the process, saved enough energy to heat and cool every home in the six New England states for a full year. We must insure the continued availability of these tax credits, and expand their use in older buildings that are not necessarily historic but still re-usable. Equally important, we must provide similar incentives that will help private homeowners use green technology in maintaining and renovating their homes.
These federal actions should be complemented by steps at the state and local levels. Over the past few years, 29 states have enacted their own state tax credits to promote the reuse of historic buildings, and we need to see them adopted in more states, including Oregon. At the local level, we need building codes that allow flexibility and innovation in making existing buildings more energy-efficient.
Finally, we need to improve green-building rating systems to ensure that they recognize the importance of building reuse. Under the current LEED standards, for example, a new building can be certified “green” even if it’s constructed outside densely populated areas; this kind of development amounts to “green sprawl,” which is contrary to every principle of sustainability. Also, under the current LEED rating system, reusing 75% of an existing building core and shell is assigned the same value as merely using environmentally-friendly carpet.
The National Trust and others are working with the U.S. Green Building Council – at their invitation – to improve these and other points. It will take time, but I hope that we’ll eventually arrive at a revised LEED rating system that accurately reflects the environmental benefits of “smart” locations and building reuse.
These public-policy steps are critically important, but we shouldn’t wait for government to act. That’s why the National Trust has launched its own Sustainability Initiative.
In addition to advocating the new policies we need, our Initiative will work to refute some common misconceptions about energy efficiency in older buildings, and we’ll make our website a “best practices” resource for how to reduce energy consumption and use green technology in the rehab of older structures.
We’ll also take steps to integrate environmentally sound practices in the operation of historic sites across the country. Last week in Washington, the National Trust opened President Lincoln’s Cottage to the public. Just a few yards away from the Cottage, the Visitors Education Center is housed in a renovated historic building that is fully LEED-certified – a good example of how green practices and products can be employed in older structures without compromising their historic integrity.
Finally, we’ll continue to gather reliable data on the comparative energy costs of rehab vs. building new, and we’ll launch a major outreach effort to inform everyone – especially architects, developers, property owners and policy makers – about the benefits of preserving and reusing older buildings. As part of this effort, we’re investigating the feasibility of establishing the National Trust for Historic Preservation Green Lab here in the Pacific Northwest, the region that leads the nation in green thinking. Once we have funding for it, this office, to be located in Seattle, will provide direct technical assistance and support demonstration projects in selected communities, working in partnership with other organizations and institutions. I believe this is one of the most exciting and important initiatives we’ve ever undertaken, and we’re eager to get started.
Historic preservation has always sustained America. By protecting and enhancing the buildings, communities and landscapes that tell America’s story, preservation allows us to maintain tangible contact with the places where our identity as a nation was established and our character as a people was shaped. By helping us understand the process that made us who we are, preservation gives us the confidence to become who we can be.
Over the years, as the focus of our work has evolved, we’ve demonstrated that preservation is good for the pocketbook as well as the soul. Now, in the face of unprecedented climate change, we’re prepared to demonstrate that preservation is an essential tool for sustaining the environmental viability of the planet as well as the quality of life for ourselves and our children.
The National Trust for Historic Preservation has long played a leadership role in the responsible stewardship of America’s past. Now we’re ready and eager to play a similar role in the sustainable stewardship of America’s future.