Sustainable Design Ideas using Metal Metalcon 2009

Sustainability – To meet the needs of the present without compromising the ability of future generations to meet their own needs. Considering social, environmental and economic impacts of your actions. Sustainable Design – Design that seeks to reduce negative impacts on the environment and the health and comfort of building occupants thereby improving building performance.

Did you know? The built environment has a profound impact on our natural environment, economy, health and productivity. In the United States, buildings account for: – 36% of total energy use/65% of electricity consumption. – 30% of greenhouse gas emissions – 30% of raw materials use – 30% of waste output/136 million tons annually – 12% of potable water consumption

Now what? Design buildings that: – Reduce Carbon Emissions/Footprint – Help to reduce Urban Heat Island – Help to Reduce Peak Energy Demand – Include Sustainable materials – Ensure you can monitor Performance using Green products.

Metal Roofing

NORTH AMERICA'S MOST RECYCLED MATERIAL Steel – More steel is recycled each year than all other materials combined. Two out of every three pounds of new steel are produced from old steel. – It has an average recycling rate in excess of 50 percent since World War II and over 60 percent since Last year, over 67 million tons of steel scrap were recycled in the United States.

NORTH AMERICAN STEEL INDUSTRY COMMITMENT TO SUSTAINABILITY Operate their business in an efficient and financially sustainable way in order to supply steel products and solutions that satisfy their customers and add value to stakeholders Optimize the eco-efficiency of their products through life cycle, including increased resource and energy efficiency in the production of steel and during the use of steel products. – They are committed to the promotion of the recovery, reuse and recycling of steel products through their support of the Steel Recycling Institute. Foster the health and safety of employees in the steel industry and provide healthy, safe and environmentally sound products. Build on their knowledge of sustainability and willingly share it with others. They will be open and active in their communications and help steel companies and organizations with the supply chain to implement sustainable practices.

Sustainable Steel Steel construction materials contain at least 28 percent recycled steel and are completely recyclable. Using steel takes the pressure off renewable resources: a typical 2000-square-foot home requires about 40 to 50 trees, about an acre’s worth, to build with wood. With steel, only the equivalent of about six scrapped automobiles are needed.

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COOL METAL ROOFING How it works!

What is Cool Metal Roofing? Metal Roofing is Cool Cool metal roofing is a family of sustainable, energy efficient roofing products comprised of unpainted metal and prepainted metal. It is available in a wide variety of finishes, colors, textures, and profiles for steep-slope and low- slope applications.

How Cool Metal Roofs works Solar Reflectance Emmitance

Cool Metal Roofing Cool Metal Roofing is Highly Reflective – using Pigment Technology Metal roofing meets the EPA Energy Star Roof Products Program performance criteria. Metal roofing is also eligible for other cool roof incentive programs.

Cool Metal Roof Vocabulary Reflectivity – a measure of the portion of solar radiation that is reflected away from a surface Emissivity - the capacity of a body to re-emit infrared energy that has already been absorbed

New IR Pigments = Less Heat = Energy Savings SR = 14%SR = 26%

GA School board saves! Two identical buildings with same exposure, no shading. Thermostat control at board office. Only One variable: Both schools used same color: Forest Green – One roof has a TSR of 12% – – One roof has TSR of 29% – energy star approved. – NET SAVINGS: $ per year – Expected life of the roof – 45 years – – Realized savings of $ 369,000 over its useful life with no required maintenance to the roof!

Reduce Urban Heat Island!

Life Expectancy Based on a study conducted by Ducker in 2003, metal roofs have a significantly longer expected service life than either asphalt or single-ply roofs. According to Ducker findings, metal roofs are expected to last 17 years longer than asphalt and 20 years longer than single-ply. Expected Roof Life Years Metal: 40 Asphalt:23 Single-ply:20 Due to its credible long life and documented durability, metal roofing makes an attractive investment.

Little to no maintenance

Energy Performance

Life Cycle Cost According to Ducker’s 2004 research study, the life cycle cost of a metal roof is significantly less than an asphalt or single-ply roof. The expected life cycle cost of metal roofs reported in this study is 30 cents per square foot per year, asphalt is 37 cents per square foot per year, and single-ply roofs is 57 cents per square foot per year.

Life Cycle

Little to no Maintenance

Other Cool Roofing facts Cool Metal Roofing is Very Durable – Metal roofs are credibly proven to last over 30 years with minimal maintenance. Metal roofs are documented to resist wind, hail, fire, and earthquakes. Painted metal roofs retain 95% of their initial reflectance and emittance over time. Cool Metal Roofing has Recycled Content and is Recyclable – Metal roofs typically have a minimum recycled content of 25%. Metal roofs are 100% recyclable at the end of a long, useful life. Cool Metal Roofing is Aesthetically Pleasing – Metal roofing is available in a wide range of finishes, colors and profiles, giving architects extensive design flexibility.

Eco Efficiency Analysis: A Life Cycle Assessment of Cool Metal Roofing in the Steep Slope Market

Use of products Extraction of Raw Materials Processes Disposal Recycling Products Consider the Total Life Cycle

Eco Efficiency Analysis: A Life Cycle Assessment of Cool Metal Roofing in the Steep Slope Market Metal has a very low Eco-impact relative to other steep slope roofing materials. Cool metal has an even bigger impact by reducing net energy consumption The EEA supports the argument that metal is the “Greenest” system available for steep slope/residential markets.

Metal Roofing and BIPV

BIPV – Building Integrated PV Uni-Solar/Ovonics has developed light weight, flexible solar panels that can be incorporated directly into roofing systems. These lightweight durable panels provide power output performance characteristics equal or better than their conventional relatives with a significant weight reduction and the ability to produce energy on cloudy days.

Thin Films Enhanced durability – accepts foot traffic Rocks and Hail will not damage out put of solar panels Lightweight – no structural reinforcement needed Dade County Approved for use in hurricane wind zones Performs well in shaded conditions Unified 20 year roof/pv warranty

New Technology – Thin Films

PV Laminates and Metal Roofs

PV Laminates and Metal

Metal and Solar

What Does a 100kW PV System Mean? SUNRISESUNSET As the sun rises the photovoltaic cells begin to produce electricity at a low level At noon a 100kW system is producing at its optimum output In California the average 5 peak sun hours a day Therefore, we could say that this 100kW system produces 500kWh/day (100kW x 5 hours = 500kWh) Depending on your energy usage profile a 100kw system could produce all or part of your total energy needs

METAL ROOFING, SOLAR AND THERMAL HOT WATER USING HEAT TRANSFER

One Step Further

Thermal System using Copper SS

METAL ROOFING, SOLAR AND THERMAL HOT WATER USING HEAT TRANSFER

Solar Monitoring

Questions? Comments? Concerns ?