Green Building and LEED

Green Building Benefits

Metal is widely recognized as a building material that offers many Green Building benefits, including:

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Energy Efficiency

The radiative properties of cool metal roofing reduce the amount of heat transfer into the living or attic space below the roof, which in turn lowers air conditioning costs and energy production at the power plant. Studies have shown that a cool metal roof can save a building owner as much as 20% in their cooling energy costs.

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Durability

Metal roofing has the greatest ability to perform over a long period of time in a wide range of weather conditions.  Its proven longevity virtually eliminates the need to use future raw materials to produce roofing.

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High Recycled Content

Most metal roofs have a high recycled content. This is in stark contrast to conventional roofing materials which have much lower recycled content.  The recycled content of metal has proven to be important to state and local municipalities listing metal as “green” in their solid waste districts or departments of natural resources. 
McElroy Metal Recycled Content Statement

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Recyclability

Metal roofing is 100% recyclable at the end of its roofing life.  This helps to eliminate the waste stream to landfills, where most conventional roofing products end up.  Each year about 20 billion pounds of old composition roofing shingles are dumped into US landfills.

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Weight and Strength

Depending on the type of metal roof product and the gauge, metal roofing can be 1/8 the weight of conventional roofing shingles. As a result, metal roofing puts fewer loads on the structure and foundation design and extends the life of a building.  The inherent strength of metal, combined with the light weight, provides building owners with the option of installing metal roofing directly over old roofing materials.

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Safety

Metal roofing and the exterior paint systems used with them are safe materials that pose no health risk.  The surfaces are inert, with no gas emissions or allergens.  The material is noncombustible, and tested for wind resistance, fire resistance, and hail resistance.

To a building owner, energy represents the single largest controllable operating expense. (source: Building Owners and Managers Association) Most of this energy is used for heating, air conditioning, lighting, heating water, computers and entertainment.  A building’s roof can be the least energy efficient component of a building envelope.  Combining these facts with the reality of increasing energy prices, it is no wonder that conservation measures and improved energy efficiency are becoming popular and important aspects of Green Building Design. 

Leadership in Energy and Environmental Design (LEED)

"LEED” is an acronym for Leadership in Energy and Environmental Design. It is a whole building certification rating system instituted by the US Green Building Council. In the LEED program, a building project is awarded points in categories for compliance with established sustainability standards. Architects, designers and building owners plan a project in order to acquire points in the program to achieve a level of certification for the building project. There are many LEED programs for different types of building projects. The flagship program, LEED-NC (New Construction), uses the following categories for a project:

At McElroy Metal, we take LEED© project documentation seriously and issue only project-specific documentation for USGBC submittals.  Please contact your sales representative for specific information.  The chart below is provided for guidance only.

Marriott Austin

McElroy Metal Leadership in Energy and Environmental Design (LEED) Guidelines V.4

Category Credit Max. # of Points Explanation To Learn More, Click Here:

Integrative Process

Integrative Process

1

The use of energy efficient insulated McElroy Metal roofs and wall panels can be factored into your recommended energy modeling and may help achieve this credit.

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Sustainable Sites

Heat Island Reduction

2

Our Solar Reflectance Index (SRI) paints reduce surface temps and heat island affects so they are a great path to help achieve these points.

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Rain Water Management

3

Sloped metal roofs are ideal for rainwater harvesting systems.  A rainwater harvesting system integrated into a McElroy Metal roofing system can help manage rainwater on-site and achieve points in this category.

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Water Efficiency

Outdoor Water Use-Reduction

2

Reduce water use on-site by integrating a rainwater harvesting and landscape irrigation system into your McElroy Metal roof and you may achieve points in this category. 

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Indoor Water Use-Reduction

6

Reduce potable water by combining a rainwater harvesting and graywater system with your McElroy Metal roof and you may qualify for points here as well. 

 

 

 

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Energy & Atmosphere

Optimize Energy Performance

18

Energy efficient McElroy Metal cool metal roofing, single skin wall systems and IMP panel systems can help reduce energy demand and meet the requirements for this credit. 

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Renewable Energy Production

3

Metal roofing is the ideal platform for photovoltaic and/or wind generation.  Using Integrated PV or solar thermal technologies with McElroy Metal roof systems can help a LEED-registeredbuilding project to qualify for these credits.

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Materials & Resources

 

Building Life-cycle Impact Reduction

5

With a 50+ year life span, metal roofing and siding products can be a great asset in the quest for this credit.  Point earning potential can be based on re-use of existing material or buildings or a whole building Life-cycle Assessment. 

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Building Product Disclosure and Optimization-Environmental Product Declarations

2

This credit encourages designers and owners towards the use of environmentally friendly products. 

 

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Construction & Demolition Waste Management

2

The primary goal of this credit is to divert construction and demolition waste from landfills. McElroy Metal roof or wall panel systems that are fully recyclable contribute to this credit. 

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Indoor Environmental Quality

 

Acoustic Performance

1

McElroy Metal insulated wall and roof systems can help meet LEED criteria for composite sound transmission class (STC) ratings.

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Thermal Comfort

1

Based on the excellent thermal performance of insulated metal panels, McElroy Metal wall and/or roof systems can be designed to help a LEED-registeredproject to qualify for this credit. 

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Innovation

Innovation

5

McElroy Metal products integrated into the overall design can help a LEED registered project to qualify for points in this credit if the building’s design team applies strategies or measures that demonstrate performance above the requirements in various categories and /or innovative performance not specifically addressed by LEED. 

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Additional Information

The information shown is intended to be only a synopsis.

  1. To download the complete McElroy Metal Guide for Leadership in Energy and Environmental Design (LEED) Version 4, click here: McElroy Metal LEED Credit Documentation.
  2. To download the steel industry's guide for Leadership in Energy and Environmental Design (LEED) Version 4, click here: LEED v4 Steel Industry Guide
  3. LEED V.4 no longer utilizes the credit number system.
  4. LEED requirements are based on all materials constructed under the project contract, of which metal products are only a portion. Credit values shown on this table reflect those available, and do not represent a guarantee of credits to be issued.

Check your local energy code regarding the use of cool roof colors. It is possible that in colder climates, darker roof colors can provide optimal energy performance.

For more information about LEED and the USGBC’s requirements for LEED Certification, please visit www.usgbc.org/LEED.