Welcome to the presentation on Cool Metal Roofing, developed and sponsored by Petersen Aluminum Corporation. Cool Metal Roofing

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1 Slide 1 Cool Metal Roofing Welcome to the presentation on Cool Metal Roofing, developed and sponsored by Petersen Aluminum Corporation. Petersen Aluminum Corporation Elk Grove Village, IL Slide 2 McGraw-Hill is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-aia members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. Petersen Aluminum Corporation is a Registered Provider in the AIA Continuing Education System and as such, this presentation is eligible for 1 Continuing Education Unit in the AIA program. Slide 3 Copyright Notice This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is strictly prohibited.

2 Slide 4 Learning Objectives Atthe end ofthis course,you w ilbe able to: Describe how cool metal roofs can reduce cooling energy in a building. Explain the impact cool metal roofs have on lowering peak demand for electricity. Identify ways in which cool metal roofs comply with energy codes and standards. Discuss how cool metal roofs can reduce the environmental burden of a building. Discuss how cool metal roofs can qualify for voluntary programs and incentives. The learning objectives of the presentation are shown here. You will learn how cool metal roofing can reduce the cooling energy in a building and lower peak demand for electricity. You will also see how cool metal roofing can comply with many national energy codes and standards as well as reducing the environmental burden of a building. There are many voluntary green initiatives in the country and this presentation will show how cool metal roofing can qualify for many of these programs. Slide 5 Content The content of the presentation is shown here. The Roofing Market Benefits Energy Principles of cool roofing Research Urban Heat Island Energy Codes/Standards Initiatives Incentives Summary

3 Slide 6 Metal Roofing Market Size Total Roofing Market 278 million squares* Over $30 billion in sales Metal Roofing Market*: 32.5 million squares Residential 16 million squares 10% of total residential market (94% re-roof; 6% new roof) Commercial 16.5 million squares 14% of total commercial market *( 1 square = 100 ft 2 )* Source:Ducker Research,2008 study The overall roofing market is estimated to be almost 280 million squares. One square is the equivalent of 100 ft 2. The roofing market represents $30 billion in sales. The metal roofing share of the overall market is 32.5 million squares. This is broken down into 16 million squares in the residential market and 16.5 million squares in the commercial roofing market. These figures are from the Metal Construction Association s Metal Initiative program. Slide 7 Metal Roofing Benefits Aesthetic options Design flexibility High strength-to-weight ratio Class A fire rating Hail resistance Wind resistance Sustainability Durability Platform for rooftop renewable energy There are many features of metal roofing that result in benefits to a building owner. Today s paint finishes provide unlimited aesthetic options to a designer. Metal roofing is a formable product that offers design flexibility to accentuate a building. Metal is strong but is light in weight. Since it is a non-combustible material it carries a Class A fire rating. The strength of metal roofing allows it to perform well in hailstorms, where the integrity of the roof is not jeopardized. The special clips and fasteners, and the design of the metal panels, give metal roofing exceptional wind uplift resistance. The durability of metal roofing is a key point in its sustainability. As we ll see later in the presentation, a metal roof can be the ideal platform for rooftop mounted renewable energy systems.

4 Slide 8 Building Boom in U.S. Roughly 89 million new or replacement homes will be built in U.S. over next 30 years to keep up with population growth. To keep up with the anticipated population growth, many more new homes and buildings will be constructed over the next years. By 2030 about half of the buildings in America will have been built after Slide 9 Energy Now let s take a look at our country s energy situation. Slide 10 The USA s Conundrum 2% of the world s resources 5% of the world s population 25% of the world s energy In the USA we have what is commonly referred to as the Conundrum. We possess only 2% of the world s natural resources, and have only 5% of the world s population. But we consume 25% of the world s energy. This is an indication of the size and strength of our economy relative to the rest of the world.

5 Slide 11 The U.S. Energy Forecast The US primary energy consumption is expected to grow 1.1% annually. And that energy usage is expected to increase more than 1% annually for the foreseeable future, according to the Energy Information Administration. Slide 12 By The Year 2030 Our nation s electricity demands will be 45% greater than today. Just looking at our electricity demands of today compared to the projection in 2030 reveals a 45% increase. This will put an enormous strain on an already overloaded grid across the country. Source: Nuclear Energy Institute Slide 13 Conservation and Efficiency The cheapest, most reliable source of new energy is saved energy. Peter Turnbull, PG&E But there is some low hanging fruit that we need to be aware of. It is true that our primary sources of energy are oil, natural gas, coal and nuclear. But energy conservation is another source of energy in some ways. Many refer to Energy Conservation as the fifth fuel.

6 Slide 14 Roofs and Buildings Buildings are responsible for: Almost 3/4 of nation s electricity consumption. More than 1/3 of total primary energy use. As we saw earlier the building sector is responsible for a significant amount of our nation s primary energy as well as its electricity use. Slide 15 Energy Use in Buildings The uses of that energy are shown here. In either the residential or commercial segment of the building sector, cooling and heating energy account for approximately 1/3 of total energy consumption. Slide 16 Why do we care? Sustained growth in building construction is expected. Roof can be least energy efficient and least durable component of a building envelope. Metal s share in roofing is expected to increase. Cool roofing can help to save energy and improve the environment. So with all of this said, why do we even care about the impact of roofing? The roof can often be the least energy efficient component on a building. The DOE estimates that of the cooling/heating energy in a building, half of it is attributed to the impact of the roof. Construction is growing, and therefore the roofing market will continue to grow. And metal s share in the roofing market continues to grow.

7 Slide 17 Cool Metal Roofing Reduce cooling energy use 15-25%. Help reduce peak demand during summer. Help mitigate urban heat island effect. Our topic today is specifically cool metal roofing. Studies have shown that a cool metal roof can reduce the cooling energy in a building, reduce the peak electricity demand during a summer afternoon, and also help to minimize the urban heat island effect, which we ll describe later. Slide 18 Potential Net Energy Savings Lawrence Berkeley National Laboratory in California estimated that if certain large cities would simply convert 15% of their roof surface area to a cool roof, the amount of energy savings are what we see in this graphic.

8 Slide 19 40% of raw material use 136 million tons of waste Most people do not consider the fact that buildings have an impact on the environment. It is not just industry or cars that have a carbon footprint. Buildings account for a large amount of CO 2 and other greenhouse gas emissions through fossil fuel fired power plants that are providing that energy. In addition they have a tremendous impact on the consumption of potable water, which is becoming a precious commodity. The construction of buildings consumes 40% or 3 billion tons of raw materials on an annual basis. During the construction, over 130 million tons of construction and demolition waste are produced annually, which is an average of 2.8 lbs/person/day in the US. Slide 20 Principles of Cool Roofing Let s take a closer look at the principles of cool roofing.

9 Slide 21 Solar Energy Spectrum Ultraviolet (UV) 3% of total energy responsible for sunburn Visible (VIS) 40% of total energy visible light Infrared (IR) 57% of total energy felt as heat! To understand this, we need to look at the solar spectrum of radiation from the sun. Ultraviolet (UV) radiation amounts to a small percentage of the total energy striking the earth s surface. Likewise, the visible portion of the spectrum is about 40% of the total. The infrared energy in the longer wavelengths amounts to the largest percentage of the spectrum. We don t see this energy but we feel it as heat when it strikes a surface. Slide 22 Solar Reflectance (SR) Sometimes called reflectivity. Percentage of all solar radiation reflected from surface. Usually expressed as a decimal. Reflectance of painted metal depends on color and pigmentation. Materials with high SR usually have cooler surface temperature. So, let s look at the important terms to know regarding cool roofing. First, the solar reflectance, or SR. This is the percentage of all solar radiation that is immediately reflected from the surface. It is reported in a decimal or percentage. The reflectance of painted metal depends on the color and the type of pigmentation used. Normally, surfaces with higher SR have a cooler temperature. It is important to note that solar reflectance is a property of a material based on the very outermost surface. For example, the solar reflectance of a white painted aluminum sheet and a white painted steel sheet, with identical paint systems, would be identical since the outermost surface of both materials is the white paint. In this example it is the paint that imparts the solar reflectance of the painted metal roof.

10 Slide 23 Thermal Emittance (TE) Sometimes called emissivity. Percentage of absorbed heat energy emitted to night sky. Expressed as a decimal. Thermal emittance of painted metal is high regardless of color. Materials with high TE cool down faster. Another important term is thermal emittance or TE. This is the percentage of absorbed heat energy that is re-emitted to the sky as infrared radiation. The thermal emittance of painted metal is high regardless of the color or type of paint. Thermal emittance of unpainted metal is always very low. With a few exceptions, any other material that has an organic or non-metallic surface will have a high thermal emittance. Those products that do have high thermal emittance tend to cool down faster. Slide 24 Energy Balance on Roof Surface Total Solar Radiation Reflected Radiation Re-Emitted Energy Absorbed Energy Net Heat Flux Into Roof Convection Roof Surface Layer When we put together all of the energy sources involved in a roof, we get this type of energy balance. We have the solar energy from the sun striking the surface of the roof. Some of that energy is immediately reflected away due to the solar reflectance of the surface. What is not reflected is absorbed into the outer surface causing it to warm. As air moves across the surface of a roof some of the heat from the warm surface can be removed through convective cooling. But some of that heat energy can be re-emitted to the sky due to the thermal emittance of the roof material. The balance of the heat energy is conducted through the roof material and flows into the building space below the roof assembly. Obviously, the more solar energy we can reflect or re-emit, the less heat gain takes place on that building.

11 Slide 25 Roofing Material Thermal Properties Solar Reflectance Thermal Emittance Metal (unpainted) Metal (painted) * Comp Asphalt Shingles Single Ply Membranes Built Up Roofing Modified Bitumen Concrete/Clay Tile * 0.90 * depending on color Emissivity is generally high in coatings and paint films, but very low in unpainted metallic surfaces Source: ORNL and LBNL Here are some typical thermal properties of common roofing materials. For metal roofing, unpainted materials have high SR but very low TE. Painted metal roofing can have a range of SR values depending on the color and pigmentation type. In all cases, as we stated earlier, regardless of color, painted metal has a higher TE. Note the comparisons to other roofing materials, which all have high TE values. Slide 26 HOW DO COOL PAINT SYSTEMS WORK? Let s now look at how cool paint systems can influence the roof performance. Slide 27 Traditional Color Theory Dark colors absorb heat energy. Traditional dark roof can be 90 F hotter than ambient. Lighter colors reflect heat energy. Light colored roof can be only 25 F warmer than ambient. But WHY?? Intuitively, we know that dark colored surfaces get hotter than light colored surfaces. With roofing, a dark roof can be as much as 65 degrees higher in surface temperature than a light colored roof. But why does this happen?

12 Slide 28 Paint Technology Pigments give paint its color. Example: Blue paint Special pigments absorb all other colors and reflects the blue wavelengths of light. In paint, we achieve color by using pigments. For example, a blue pigmented paint absorbs the visible wavelengths of other colors but reflects the blue wavelengths of energy that we can see. Slide 29 Cool IR Reflective Pigments Reflect visible light the same as normal pigments. Reflect more infrared energy. Increasing the total solar reflectance (SR). Cool Pigments offer the benefit of boosting solar reflectance by reflecting more infrared energy, without affecting the color we see. Cool reflective pigments are like a sun screen to our buildings. Slide 30 Cool Ceramic Pigments The resulting molecular structures provide superior sustainable color durability. Inorganic or ceramic synthetic materials kiln fired at temperatures exceeding 1500ºF. These special cool pigments are inorganic or ceramic in nature. They are manufactured at high temperature, similar to a porcelain process. The result is a pigment whose color and properties are very durable.

13 Slide 31 Pigments in Paint Pigments are inorganic ceramic colored powders Incorporated into paint Applied onto metal substrates Imparting a wide range of colored effects The pigments used in cool paint systems are the most durable pigments known. They are added to a paint formulation and coil coated onto aluminum or steel sheet. These pigments will not oxidize white because of this process and will chalk in their own color, if and when they do chalk. Slide 32 Higher Reflectance with Color White Beige Blue Standard SR.67 Standard SR.47 Standard SR.21 Cool SR.72 Cool SR.56 Cool SR.33 Red Gray Green Bronze Standard SR.25 Standard SR.14 Standard SR.11 Standard SR.08 Cool SR.30 Cool SR.28 Cool SR.28 Cool SR.26 To display the effects of cool pigments, this slide shows some popular colors of prepainted metal roofing and how the cool solar reflectance (SR) can be increased with no change to the color compared to the standard products. This technological development has allowed popular darker colors to be considered for residential and steep slope roofing with higher solar reflectance values. In some cases, these higher values have allowed these colors to be listed in Energy Star and other cool roof incentive/rebate programs.

14 Slide 33 Cool paint systems reduce temperature variation on roofing which Minimizes thermal movement. Extends durability of paint system. There are other benefits with the use of cool pigments. By lowering the maximum surface temperature, we can reduce the thermal expansion and contraction of a metal roof. This improves the overall integrity of the roof by minimizing the effects of wear and tear at the fasteners, joints, and clips. In addition, the lower temperature helps to extend the life of the paint system. Slide 34 Case Studies Some case studies will demonstrate the real world benefits of cool metal roofing. Slide 35 Florida Study Habitat for Humanity Homes: Metal, Shingle, Barrel tile, Terra Cotta tile, Flat tile roofs. First, we have a study that took place in Ft. Myers Florida, involving the Florida Power and Light utility and the Habitat for Humanity program. Seven homes were built with identical floor plans, size and layout. The only variable was the type of roof on each home. The indoor thermostat was set for 72 F in each home and the energy consumption was monitored over an unoccupied two month period of time in the summer months.

15 Slide 36 Typical Residential Construction in Florida 25% drop in cooling capacity Homes in Florida typically have their air conditioning ductwork in the attic. As a result, any heat gain through the roof puts a strain on the energy efficiency of the cold air ducts. Often, the air in those ducts will warm up due to the attic heat and therefore the efficiency of the a/c unit is reduced. By minimizing the roof heat gain, and also the attic heat gain, this can be prevented which would reduce a homeowners air conditioning bill. Slide 37 Measured Roof Solar Reflectances Specimen Solar Reflectance (%) Dark gray shingle 8.2 White shingle 24.0 Terra Cotta barrel tile 34.6 White barrel tile 74.2 Flat white tile 77.3 White painted metal 66.2 Off-white metal (original) 55.5 These are the measured solar reflectance values for the various roof products that were used in the FPL./Habitat for Humanity study. The overall performance of the roofs and homes was related to the solar reflectance and the thermal mass of each type of roof. For example, the tile roof products have much higher thermal mass than the shingle or metal roofing products. As such, they tend to heat up at a slower rate and also cool down at a slower rate.

16 Slide 38 Effect of Roofing Material on Attic Temperatures Black Shingle White Metal White Tile Outdoor Air Tem p Monitoring the attic temperatures over the course of time also shows how the roof products heat up and cool down during a day. This curve shows that the white painted metal roof reaches a slightly higher peak temperature compared to a white tile roof (due to the difference in the solar reflectance), however in the afternoon and early evening hours, the metal roof, with lower thermal mass, dissipates its heat better than the tile. What this means is that the homeowner will realize lower air conditioning usage in the late afternoon and early evening hours when compared to a tile roof system. Slide 39 White painted metal roofing saved 23% in cooling energy Savings in Cooling Energy (%) White Shingle Terra Cotta Tile 20 White Barrel Tile 17 White Flat Tile 23 White Metal The results from this case study showed that despite the fact that the white painted metal roof did not have the highest solar reflectance, it still saved 23% in cooling energy, which was the highest of the roof systems tested. Again, this was a function of a relatively high solar reflectance and a lower thermal mass.

17 Slide 40 Urban Heat Island Effect Dark roofing surfaces, parking lots, roads. Less vegetation and shade. Higher ambient air temperature. Urban areas can be 6-12 F warmer. Higher air conditioning loads to cool buildings. In metropolitan areas, dark surfaces found on roofs, pavements and parking lots absorb solar energy and heat up over time. There is usually less vegetation in these areas, minimal shading, and a large density of concrete and masonry constructed buildings, which have high thermal mass. As a result, the air temperatures in these urban areas is higher and remains higher than in the surrounding suburbs. In some cases the difference can be as much as 12 degrees higher in these urban areas. This is known as the urban heat island effect. The higher air temperatures mean that air conditioning equipment must run harder and longer, which drains the electrical energy from the grid. Slide 41 Reflectance* of Urban Surfaces * This schematic shows some typical surfaces found in cities, and their range of solar reflectance or albedo values. Note that the dark surfaces are very low in reflectance. * albedo = solar reflectance

18 Slide 42 Thermal Images of Urban Areas Thermal images like these from various cities all show how the downtown areas are higher in temperature than suburbs. In these photos, the red depicts the warmest areas. Slide 43 Smog Formation in Urban Areas Another impact from the urban heat island is poor air quality. Heat is a catalyst for the formation of smog, and as a result urban heat islands are responsible for more smog or poor air quality. Heat is a catalyst for smog. 0.5ºF decrease in heat = 5% reduction in smog By replacing the dark roofs with cool roofs in these urban areas, there is potential for lowering the ambient air temperature which would lower the energy consumption and improve air quality. Slide 44 Energy Codes and Standards With the growing demand for energy and energy efficient buildings, a new set of more stringent energy codes and standards have been introduced.

19 Slide 45 Across the country, states have adopted varying versions of the ASHRAE 90.1 energy code for commercial buildings. However some states have not adopted any national energy code. This map shows the diversity of these types of codes. Source: Building Code Assistance Project Slide 46 ASHRAE 90.1 Addendum f Modified cool roof provisions. ASHRAE 90.1 is the dominant energy code for commercial buildings. In the new version, cool roofing provisions are specified as shown in this table. Min aged solar reflectance Min aged thermal emittance

20 Slide 47 IgCC Public version 1.0 Climate Zones 1, 2 & 3. Roof Min Aged Min Aged Min Slope Solar Thermal Aged Reflectance Emittance SRI < 2: : The newly released public version 1.0 of the International Green Construction Code, also includes cool roof provisions as shown in this table. Note that the IGCC requires cool roofing only in Climate Zones 1,2 and 3, which represent the southern tier of the US. In this case, the code requires minimum aged solar reflectance and thermal emittance values, but also an aged SRI. SRI is the Solar Reflectance Index which is a unit-less number calculated using an ASTM method that takes into account both the solar reflectance and thermal emittance values of the material. The IGCC is a model code that would be an overlay to other ICC codes such as the International Building Code. Slide 48 ASHRAE Standard Heat Island Mitigation Climate Zones 1, 2 & 3 Min 75% roof area. SRI 78 for low slope SRI 29 for steep slope OR Comply with Energy Star Program In 2009 ASHRAE also released a Green Building standard aimed at the commercial building sector. This standard pertains to high performance green building criteria. In the Sustainable Sites section of ASHRAE the Heat Island Mitigation requirements include a two-tiered approach to cool roofing, as noted in this slide. Again, these provisions would apply to buildings only in climate zones 1,2 and 3.

21 Slide 49 Building Codes Assistance Project There are some resources available on the internet that can direct you to the latest information on energy code issues in specific states. One such resource is the website for the Building Codes Assistance Project. Slide 50 Initiatives Most are voluntary. Some are mandatory. Some are self-certified. Some require independent laboratory. In addition to code enforcement, the marketplace is riddled with initiatives and incentives to use cool roofing. Most of these programs are voluntary for now. However, some are mandatory. Many of the programs also allow a manufacturer to self-certify their products but there is growing interest in requiring third-party testing for verification of cool roof products. Slide 51 Cool Roofing Initiatives California Title 24 CEC Florida White Roof Credit Georgia Energy Code New York Tax Incentive Chicago Urban Island Code Seattle Energy Star Earthcraft ACE 3 CREST DSIRE Federal Energy Bill DOE programs EPA programs Urban Island Group ORNL BTC Captain Planet Zero Energy Millennium Star project ASTM committees ASHRAE committees CRRC Smart School Program Zero Energy Commercial Bldg Initiative This is a partial list of the hundreds of cool roofing initiatives and programs that exist today. These are national and local programs that define cool roofing differently in most cases.

22 Slide 52 Voluntary Programs Energy Star Cool Roof Rating Council LEED Green Globes GreenSpec Green Guard Two of the more familiar voluntary programs that have an impact on cool roofing are the EPA/DOE s Energy Star program and the USGBC s LEED program. Slide 53 Energy Star Roof Products Program Initiated by EPA in Exterior roof surface is the product. Aimed at roofing manufacturers and suppliers. Numerous paint systems approved. The Energy Star Roof Products program was initiated by the EPA in 1998 and was patterned after the overall program used for appliance, and other home consumer products. The emphasis of the program is on the roofing manufacturer, but material suppliers must comply with the solar reflectance performance criteria. To-date, there have been many metal roofing products and paint/coating systems related to the metal roofing industry, listed as Energy Star labeled products.

23 Slide 54 Energy Star Roof Product Program Performance Criteria Initial Solar Aged Solar Roof Slope Reflectance Reflectance Low Slope (< 2:12) Steep Slope (>2:12) The basic performance criteria for qualifying as an Energy Star labeled roof product are shown here. Note that the criteria are only for solar reflectance no thermal emittance values are noted as of yet. For low slope roofing, the minimum initial solar reflectance must be 0.65 and the min aged value must be Another set of criteria exists for steep slope roofing. Here the minimum initial solar reflectance must be 0.25 and the 3-year aged value min must be Slide 55 Cool Roof Rating Council Established in Non Profit organization. To develop fair, accurate and credible methodology for evaluating and labeling of ALL TYPES of roofing products. Certification system launched August The Cool Roof Rating Council (or CRRC) was established as a non profit organization to develop a methodology for evaluating and labeling all types of roofing products. It was actually modeled after the National Fenestration Rating Council (or NFRC). Their program was officially launched in 2002 but has been repeatedly revised over time. The importance of having products on the CRRC listing is that the California Energy Commission only recognizes the CRRC listed products as the labeled products to be used in the Title 24 California energy code. LEED references the CRRC listing. Energy Star accepts CRRC values. And ASHRAE standards reference CRRC. It is becoming a formidable organization for the evaluation and verification of cool roofing products.

24 Slide 56 Cool Roof Rating Council Cool Roof criteria are not defined. Labeling program with SR, TE and SRI. Cost to roofing or coating manufacturer dependent on number of products submitted. Unlike the Energy Star program where there are minimum SR values required, the CRRC does not establish any minimum thresholds or definitions of cool roofing. Any roofing product, light or dark, can be listed on the CRRC directory provided it is tested in accordance with their methodology, which includes third party testing. Another difference between CRRC and the Energy Star program is that the CRRC requires that the thermal emittance values be measured and recorded. Slide 57 Example of CRRC Label Solar Reflectance Thermal Emittance Rated Product ID Licensed Manufacturer ID Classification Initial Weathered Pending Pending XXXX XXXX Production Line Cool Roof Rating Council ratings are determined for a fixed set of conditions, and may not be appropriate for determining seasonal energy performance. The actual effect of solar reflectance and thermal emittance on building construction may vary. Manufacturer of product stipulates that these ratings were determined in accordance with the applicable Cool Roof Rating Council procedures Here is an example of the CRRC label that is available to the manufacturer of a roof product that is listed on their directory. It is important to note that initial SR and TE values are acceptable for the product to be listed and for the label to be issued. Aged data must be obtained within a certain period of time and is then added to the label. The label can be used on promotional literature and packaging.

25 Slide 58 Architecture 2030 Challenge Eliminate fossil-fuel energy consumption from all new buildings by Another prominent initiative related to energy efficiency and cool roofing is the Architecture 2030 Challenge which many of you are familiar with. The goal of this program is to eliminate fossil-fuel energy consumption in all new buildings by Improvements in energy efficiency and on-site energy generation are key to meeting this goal. The use of a cool metal roof can help to achieve the energy conservation that is needed in the 2030 Challenge. Slide 59 Zero-Energy Commercial Building Initiative Achieve marketable zero-energy buildings by Another initiative was launched by the Federal Government to achieve marketable or affordable zeroenergy buildings by A zero energy building or net zero energy building is one that consumes no net energy by generating or harvesting as much energy as it consumes. This type of building also has zero carbon emissions annually.

26 Slide 60 Goal To develop and disseminate technologies, practices, and policies for establishment of zero net energy commercial buildings. Major milestones are achieving zero net energy buildings in: New commercial buildings by % of all commercial building stock by % of all commercial buildings by In 2007, Congress created the Zero Net Energy Commercial Buildings Initiative as part of the Energy Independence and Security Act. It was officially launched by the Department of Energy on August 5, The Initiative brings together academia, industry and federal agencies to develop and demonstrate new energy reducing technologies and make them affordable or marketable by The major milestones for achieving zero net energy buildings are: All new commercial buildings by 2030; Fifty percent of all commercial building stock by 2040; and All commercial buildings by The use of a cool metal roof can help in lowering the energy consumption, and it can serve as an ideal durable platform for rooftop mounted renewable energy generating technology. Slide 61 LEED 2009 Building Certification Program Whole-building approach encourages and guides a collaborative, integrated design and construction process. Four levels of certification pts pts pts 80+ pts Architects are familiar with the USGBC s Leadership in Energy and Environmental Design (LEED) program. This section of the presentation is intended to illustrate how a building using a cool metal roof can qualify for points in the LEED 2009 rating program.

27 Slide 62 Cool Roof Credit Cool metal roof qualifies for one point in Sustainable Site Credit 7.2, Heat Island Effect- Roof. Must cover a minimum of 75% of roof surface area. Requirements (SRI minimum) Roof Type Slope SRI Low slope roof 2:12 78 Steep slope roof > 2:12 29 The most direct qualification is in the Sustainable Sites category where Credit 7.2 for Heat Island Roof defines the radiative properties of a roof. The roof must cover at least 75% of the surface area and meet the minimum SRI values as shown here for low and steep slope applications. One point is awarded for this Credit. Slide 63 Incentives There are incentives to building owners and contractors who find ways to increase the energy efficiency of their structures. Slide 64 Statewide Incentives An excellent resource for identifying incentives available for renewable energy installations or efficiency improvements is the Database of State Incentives for Renewables and Efficiency. The database allows you to see all of the programs, contacts, demographics, and upcoming changes in any state in the country. Information is updated almost daily so it is a great resource for this type of information.

28 Slide 65 Extended tax incentives related to cool roofing from Energy Policy Act of American Recovery and Reinvestment Act of 2009 At the Federal level, there is also legislation passed by Congress that creates tax incentives to building owners and contractors for constructing energy efficient buildings. These provisions were initially introduced in the Energy Policy Act of 2005 but have been extended through new legislation through Slide 66 Tax Credits and Deductions Residential Tax credits to homeowners up to $1,500 for cool prepainted metal roof certified in Energy Star program. Tax credits for contractors up to $2000 for new home energy efficiency criteria. Commercial Tax deductions to owners up to $1.80/ft 2 for energy efficient building criteria. For homeowners, a tax credit is available for installing a prepainted cool metal roof that is ENERGY STAR labeled. At the commercial level, a tax deduction of up to $1.80/ft 2 is available to owners or designers of new or existing commercial buildings that save at least 50% of the heating and cooling energy of a building that meets ASHRAE Standard Partial deductions of up to $0.60/ft 2 can be taken for measures affecting any one of the three building systems: a) the building envelope, b) lighting or c) heating and cooling systems. The tax deductions are available for buildings placed in service from 2006 through 2013.

29 Slide 67 Summary Let s summarize what we ve learned in this presentation. Slide 68 In this presentation, we ve learned that cool metal roofs Are growing in popularity. Can reduce cooling energy in a building. Can lower peak demand for electricity. Can comply with energy codes and standards. Help to reduce the environmental burden of a building. Qualify for voluntary programs and incentives. We ve shown that cool metal roofing is growing in popularity due to the desire to lower energy consumption A cool metal roof can lower the cooling energy in a building, especially in cooling dominated climates. It can also help to lower the peak demand for electricity on a warm summer afternoon, which is of great interest to the utility companies. We ve seen how energy codes are becoming more stringent and how new codes and standards are being introduced for high performance green buildings. Cool metal roofing can comply with many of the roof provisions in these regulations. Cool metal roofing not only helps to reduce energy, but it can have a positive environmental impact as well, through mitigating urban heat island effects, serving as a platform for renewable energies, and for integrated rainwater catchment systems. The number of green or cool initiatives and incentives continues to grow and we ve seen where cool metal roofing can often qualify for these programs or incentives.

30 Slide 69 Thank you Thank you for your time. This concludes the AIA Continuing Education System Program. Please take the test to earn your AIA credits. Questions? IIL:1 800 PA C CLAD MD: ITX: GA: IMN: