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LEED and Natural Stone
- 1. LEED, Sustainability and Stone Innovation and Design Process 7% Sustainable Sites 20% Indoor Environmental Quality 22% Water Efficiency 7% Materials and Energy and Resources Atmosphere 19% 25% 1 LEED Point Distribution
- 2. LEED, Sustainability and Stone Achieving LEED points – Sustainable Sites: Heat Island Effect Non- roof Energy and Atmosphere: Optimize Energy Performance Materials and Resources: > Building Reuse > Construction Waste Management > Materials Reuse > Regional Materials Innovation and Design: Using stone can contribute to life-cycle cost and durability, mold resistance, improved air quality Top: Gwinnett Environmental and Heritage Center Bottom: California Department of 2 Education Headquarters, in Sacramento, CA. Both achieved LEED Gold
Hinweis der Redaktion
- Let’s look at LEED as example of how you can consider stone to support sustainability goals. The LEED rating system of the US Green Building Council is among the most respected and fastest growing green building rating systems. It seeks to provide guidance and a set of measures for consistently applying sustainable design ideas. The voluntary system considers and awards points across 6 major areas as shown in the graph above. There are also levels of green building that can be accomplished through the rating system: Silver, Gold, and Platinum. The program is always in a state of refinement and so is not static. You must consider and use the most up to date versions
- A few of the ways in which you can use stone to achieve LEED points. Include:SS: Heat Island Effect : Credit 7.1: Non-roof, A combination of strategies for 50% of the site hardscape, which can include roads, sidewalks, courtyards, and parking lots. Use paving materials with a solar reflectance index (SRI) of at least 29. Look for very light-colored stones (high-reflectance) and balance their use with other sustainable site strategies so as to not produce glare or produce additional storm water problems from lack of pervious areas which would impact vegetation. EA: Optimize Energy Performance: include the stone in your energy modeling and energy calculations, especially if you are using it as part of your building envelope strategyMR: Building Reuse: Credit 1.1: Maintain 75% of Existing Walls, Floors & Roof, Credit 1.2: Maintain 95% of Existing Walls, Floors & Roof, Credit 1.3: Maintain 50% of Interior Non-Structural ElementsConsider finding abandoned buildings or an existing building made of stone that could be reused entirely. This supports the reduction of new or raw materials being used to create new buildings. MR: Construction Waste Management, Credit 2.1: Divert 50% from Disposal, Credit 2.2: Divert 75% from Disposal. Consider recycling your sources of excess stone and/or eliminating it from the construction waste entirely by finding ways to use it in other parts of your project.MR: Materials Reuse, Credit 3.1: 5%, Credit 3.2: 10%, There are a number of places to look to find existing sources of stone that can be reused. Architectural salvage yards, stone yards that specialize in recycling stone, etc. MR: Regional Materials, Credit 5.1: 10% Extracted, Processed & Manufactured Regionally, Credit 5.2: 20% Extracted, Processed & Manufactured Regionally. Find a stone source within 500 miles of the project site. If only a fraction of the material is extracted/harvested/recovered and manufactured locally, then only that percentage by weight shall contribute to the regional value. ID: Using stone can contribute to life-cycle cost and durability, mold resistance, improved air quality. To truly take advantage of the life cycle and durability of stone, it is recommended that you consider going after Innovation and Design points. The two projects shown on this slide are examples of how local and recycled materials were incorporated into very different types of projects. Top: Gwinnett Environmental and Heritage Center located near Atlanta, Georgia. They were able to find a source of local stone, from a tombstone manufacturer, some of which would have gone to a landfill as waste. They incorporated the stone into the exterior of the project. They also chose the material for its durability, low cost, and low maintenance.Bottom: California Department of Education Headquarters located in Sacramento, California. Fentress Architects and Johnson Fain Partners (master architect) . The patterned marble used for the stone floors in the main lobby and elevator lobby was recycled and reused from the original Sacramento Library and Courts Building circa 1923. The overall project was procured as a design-build project with a stipulated sum, or best value delivery of $75 million. They used an integrated design approach for the project and were able to reinvest over a half-million dollars from a shortened construction schedule. So they were essentially able to provide additional sustainable features within the budget. The energy model predicted that the sustainable features would yield an average savings of $185,000 a year, resulting in an estimated payback period of less than 7 years. The building has been in operation since 2002. So in theory, the principal investment has been recouped. The state should continue to reap savings each year from reduced operational costs. Note to instructor: Explain heat island effect and solar reflectance index further if necessary.