Every human action gains in honour, in grace, in all true magnificence, by its regard to things that are to come...Therefore, when we build, let us think that we build for ever. Let it not be for present delight, nor for present use alone; let it be such work as our descendants will thank us for, and let us think, as we lay stone on stone, that a time is to come when those stones will be held sacred because our hands have touched them, and that men will say as they look upon the labour and wrought substance of them, "See! this our fathers did for us." - John Ruskin. 1907. The Seven Lamps of Architecture. J.M Dent. p. 249.
We must reconsider the notion of 'sustainability.'
Do the architects and builders of our contemporary built environments design and build for 50, 100, 1,000 years? No. Not that architects don't want to, but the rise of the developer and the builder as the most influential participant in building in America today effectively negates this desire within the profession when speaking about the outcomes of a project with a Client/Owner.
With the economic realities of the past five years or so (declining tax bases, ergo, declining funding), conversations during design and documentation invariably lead to discussions about the 'best bang for the buck'. To be fair, these discussions may include concerns about the longevity of a material or components, but they invariably center around how much can be got for how little. These discussions are most often led by the builder with the architect offering their insight into the economics of potential products, materials, components, but often to little effect since the builder is the one with their hands in the market, fingers on the pulse of the subcontractors, spreadsheets full of labor and material costs that back up their statements. Architects, too, can produce quantifiable data, but more often than not, they do not maintain a database at all or as effectively as the builders do, resorting to ad lib or a last minute call into a consultant for past costs on similar installations, resulting in additional weakening of the architect as a knowledgeable professional.
Most commercial product manufacturers' warranties are for 10-15 years; 20 if you're considering top of the line or time-tested. For others, you may be lucky to obtain 5 years. Others still may guarantee their product for 25+ years, in an exterior application at that, with a premium paid up front by the Owner.
But, what of the material economics of building? What of the life cycle cost of selecting one material, component or system over another? Architects (their consulting engineers) are often required to provide this type of analysis for the buildings systems (mechanical and electrical in terms of energy needs and consumption) when working on publically-funded projects. Should architects provide a life cycle benefits analysis of materials, components, systems and the overall design intent as well, noting expected longevity and maintenance costs associated with the materials, components and methods selected? Is it their professional obligation to sell quality over quantity? Or, is the Customer Always Right?
{An aside: I consider paying the premium up front for a fine leather wallet that I know will last me 10 or 20 years over a cheaper vinyl one (may be a cost difference of $100 over $10). But, depending on my economic situation, I need that extra $90 dollars for something else that I just can't find anywhere else in my budget, so I go with the less expensive wallet. Now, if I am super good about caring for my things, I might be able to stretch the life of that cheaper, vinyl wallet from a couple of years to 5, maintaining it and not abusing it (like overstuffing it with receipts, too much change and plastic). Realistically, I am going to get an average of 2 years of use out of that vinyl wallet, so in 20 years I would most likely buy 10 wallets for a total of $100 dollars over 20 years, same as the initial purchase for the fine wallet. But, I have used the energy of producing 10 wallets over 1 wallet, of producing vinyl over using leather, etc. In a life cycle cost analysis of the two products, I would want to look at the cost of producing the materials used, the methods for making the wallets and for their shipment. So, even if over the long run I spend the same amount to purchase a wallet over 20 years, the cost of making the goods will more than likely be different and one will be more cost effective, in terms of resources used, their cost of production, and how often they have to be repaired or replaced. It is as important to understand the amount of embodied energy in the products and materials we use in our buildings today as the energy required to use the buildings we are producing today.}
We know from the tale of the Three Little Pigs, that brick construction is better able to stand up to the Wolf's huffing and puffing over straw and twigs. We know that if we shade a painted wall in a sunny, hot locale that the paint will last longer and require less frequent repainting over time. We know that if we install glazing systems that consider effective solar heat gain coefficients that we can decrease the energy required to heat and/or cool the space it provides light and views to, lowering energy bills over the life of the building. It is time to remind the Client/Owner of these facts and help them see the benefit of choosing quality over quantity; to see this choice as an investment in their posterity as well as their community's.
Owners, working with the designers and builders of our built environments, need to require a better outcome in the design and implementation of the built environment for the generations that will follow us. They need to be obsessed by this notion. Not in pursuit of a plaque on their building or a statement on their brochure or website, but in pursuit of built environments that will be lasting, physically, psychologically and culturally, meaningful at a multitude of levels and desirous of maintaining it into perpetuity, or as long as is possible.
Today, architects, builders, owners, planners and developers have at their disposal a number of tools that allow them to document and/or delineate expected outcomes in terms of sustainable, or green, building ideals. It is in a concerted effort that all Project Team Members, Designers, Engineers, Builders and Owners ensure that the materials, components and systems selected meet or exceed expected outcomes.
LEED, or Leadership in Energy & Environmental Design, is well established and is seen by many as THE standard for producing projects with sustainable objectives. As it states on its website, LEED is a third-party source concerned with verifying that a project is designed, built and operating the way it was intended. LEED is a documentation tool, requiring the architect to document the expected outcomes (design documentation) and the realized outcomes (construction documentation). LEED is not concerned with the specifics of a design, but rather the expected savings and efficient operation of a project as set forth in standardized templates for 5 basic credit areas: Sustainable Sites, Water Efficiency, Energy & Atmosphere, Materials & Resources, and Indoor Environmental Air Quality. Additional credits concern themselves with Transportation, Infrastructure, Neighborhood and Location. LEED does not consider credits towards the LEED certification being sought based on expected Longevity, or Life-Time Sustainability, of the building and/or its components beyond the building's operation.
{a side note: Prior to the creation of LEED, architects were already designing with the objectives outlined in the LEED Credits system. By education, training and licensure testing, architects are required to consider a building's siting (wind, water, sun, climate, topography). By Code (state & international), architects and engineers must consider water usage, energy usage, quality of the air and day lighting of the interiors. By Ordinances (city, regional, state), architects and planners must consider materials, resources, transportation and neighborhood linkages. LEED's value is providing a standardized system for documenting sustainable goals within a design project, based on its type, and a means to monitor the implementation of those goals during the design and construction of that project.}
Another, newer, tool in the Sustainable Building trend is The Living Building Challenge (LBC) developed by The International Building Institute. As does LEED, the LBC is a certification system for projects that desire to be identified as sustainable in design, construction, and performance. Whereas LEED certification is given to a project upon fulfillment and certification of design and construction credits for projected outcomes, the LBC does not certify a project until the project has been operational for a minimum of 12 months and it must provide documentation of project performance which is then audited. Most importantly, while LEED (more or less) documents what architects and engineers were already doing, LBC strives to delineate a path to a near future reality in which the built environment is seen as a living organism, dependent on its environment and imparting little to no peril to its environs, that "the creation of building projects at all scales...operate as cleanly, beautifully and efficiently as nature's architecture." Ultimately LBC seeks a future in which buildings and built environments create the energy they need within their architecture, requiring no further resources once they are built, becoming less and less dependent on resources outside themselves beyond fossil-based transportation and energy use.
The LBC has 7 performance areas, deemed petals, that are subdivided into a total of twenty imperatives that denote the performance standards for sustainable environmental design, be it a building, a neighborhood, a park, etc., as they see it. Site, Water, Energy, Health, Materials, Equity and Beauty are the petals of their living organism. Several of the LBC petals hint at sustainability as a timeless act, that buildings might be thought of as sustainable entities with life spans that should be designed for. While the premise of the LBC is admirable and arguably a more transformative notion of the sustainable built environment than LEED, it still leaves the question of Longevity on tenuous terms.
Perhaps the LBC should include another petal, Longevity, concerned with how long a building or built environment is intended to remain standing and useable. This last--or at least, additional petal--would be based on the building type, the community it serves (it's cultural history and economic history as it relates to maintaining, or ennobling, structures), its resources (readily available local and/or regional materials and methods of construction, as well as, economic). Longevity should be thought of as a petal, not a subset of one or another, but a main underlying principle or performance area equal to the other petals, not buried within them. This petal is not concerned with the reuse of existing structures or environments (which are provided for in various imperatives within the other petals). This petal states emphatically that just like the other petals, Longevity matters, in terms of the materials, the energy, the people used to build it. Longevity matters in the sense of community, the cultural, the society that the building or built environment embodies.
Nay, perhaps Longevity matters more than the other petals; it supports them, it is their raison d'etre. Perhaps it is the Stem of that Flower.