RoofViews

Building Science

Solar Power in the Desert or on Roofs—What Are the Pros and Cons?

By Thomas J Taylor

November 16, 2018

Solar panels in the desert

It has been said that all of the US could be powered by a solar array covering 100 x 100 square miles in the desert, linked to storage batteries covering 1 x 1 square mile. A similar claim is that covering 0.6% of the nation's land with solar panels could power the entire country. That is equal to 11,200,000 acres or 17,500 square miles, more than the 10,000 square miles of the first estimate. Obviously, these panels would need to be placed somewhere in the southwest, where solar irradiance levels are high and land may be more available:

The blue square represents the size of one such proposed "solar farm," located in a region of high solar irradiance. At first glance, this might represent a doable project; however, it may require a level of national dedication akin to the efforts to put a man on the moon. This article will examine some of the assumptions behind these estimates and examine what would happen if similar logic was applied, not to an extremely large ground based solar farm, but to solar installations on commercial buildings. A single large solar farm would require:

  • Available land, free of environmental and other regulatory restrictions.
  • Infrastructure such as roads, labor, availability of water, and construction materials.
  • An electric grid capable of distributing power from what would essentially be a point source, out across the entire nation.

The following picture of a solar farm in the Atacama Desert, Chile, gives an idea of the apparent simplicity of the idea:

Solar farm in the Atacama Desert in north Chile

Solar farm in the Atacama Desert in north Chile[/caption] The concept seems straight forward, but such a farm needs resources and a work force that might not be readily available on such a grand scale. Alternatively, solar arrays on roofs would represent a distribution of power generation to those locations that actually use it. Also, from a regulatory perspective, solar arrays on rooftops could be simpler and more easily connected to the existing electricity grid. Below is a picture of a large array on the Atlantic City Convention Center:

Solar array system on the Atlantic City Convention Center[/caption] To examine the feasibility of supplying all or even a substantial amount of the US electricity demand from solar power, the size of that demand must be known. The first step would be to examine how much power a solar array actually produces versus the currently available energy supply and demand within the US.

US Electricity Demand

  • In 2017, according to the US Energy Information Administration, 4,014,804 thousand megawatt hours of electricity were generated.
  • The largest demand for this power was for the following uses:
    • Residential — 1,378,819 thousand megawatt hours, i.e. 34.3%
    • Commercial — 1,349,208 thousand megawatt hours, i.e. 33.6%
    • Industrial — 946,443 thousand megawatt hours, i.e. 23.6%

US Electricity Supply

It is beyond the scope of this article to fully analyze how power is generated in the US. However, the following facts are useful for purposes of this article:

  • The largest nuclear power plant in the US, located in Palo Verde, Arizona, has a capacity of 3,937 megawatts, or 34,488 thousand megawatt hours of power each year.
  • The largest coal fired power plant in the US, located in Juliette, Georgia, has a capacity of 3,520 megawatts, or 30,835 thousand megawatt hours of power each year.

Coal fired and nuclear generators are generally considered as base load plants, running at or close to capacity on a 24/7 basis.

It's worth noting that renewable sources account for approximately 17% of electricity production in the US, and solar accounts for a little over 1%.

Solar Array Power Production

Solar Farm in the Desert - It is difficult to estimate the amount of power produced by a solar array, because much depends on the location and associate solar irradiation, whether the panels are fixed or track the sun, and other factors. Using data from a wide array of existing solar farms in the US, NREL has estimated that 1,000 megawatt hours of electricity requires on average, 2.8 acres of land installed with panels. This means that a single farm capable of producing all the nation's electricity would occupy 11,241,451 acres or 17,564.8 square miles. To go back to the beginning of this article, this would be a square 132.5 x 132.5 miles, in line with other estimates.

A solar farm, located in the south west, sized between 100 x 100 and 132.5 x 132.5 square miles could supply all of the US electricity demand.

Commercial Roofing Solar Arrays - Since this analysis is forward-looking, this article will use today's commercial solar panels for the calculations.

  • For commercial roof applications, assume each panel is rated at 300 watts, and is 41 x 61 inches (i.e. 2,500 sq. in. or 17.36 sq. ft.).
  • The rated power of the panels is produced at peak sunlight, which is normally considered to be the case for 4 to 6 hours each day. For this article, an average of 5 hours was assumed.
    • The daily power output of a single panel would therefore be 300 watts x 5 hours or 1,500 watt hours.
    • The annual power output for the single panel is therefore 1,500 x 365 days or 547,500 watt-hours or 547.5 kilowatt hours (kWh).
    • Solar panels produce direct current and must be linked to a building via an inverter to convert the electricity to alternating current at 120 volts. These are fairly efficient, but to account for these and other system losses, this article assumes an overall efficiency of 90% (i.e. 10% of the produced power is lost between the panel and the user). Therefore, the single panel supplies 547.5 x 0.9 = 492.75 kWhr per year of useful power.
  • Commercial roofs cannot be 100% covered with solar panels. Access to those panels and rooftop mechanical units, areas adjacent to the roof edges, and general spacing limit the useful roof area to about 80% coverage.

Examining these numbers to calculate how much power can be obtained from commercial roofs shows that:

  • If a 17.36 sq. ft. panel produces 492.75 kWh of useful power per year, then 1 megawatt hour/year (MWhr/yr) would require (17.36 / 492,750) x 1,000,000 / 80% = 44.0589 sq. ft. of roof area.

Commercial Roofs

One possible option in this examination of the potential impact of solar arrays on commercial roofs is to evaluate how much roofing is installed every year. In general, solar arrays work best on large footprint buildings, such as big-box stores.  This building type commonly uses single-ply membranes, and therefore, are ideal platforms for solar array installations. Also, single ply membranes represent over 60% of the commercial roofing market and are therefore the basis for this first option.

  • The annual area of single-ply membrane installed is about 2,750 million sq. ft.
  • If solar was installed on this area of roofing, using the data calculated above, then it would potentially provide 2,750 x 106 roof sq.ft. / 44.0589 sq.ft/MWhr = 62,416.4 thousand MWhr of power per year.
  • This represents the equivalent of:
    • Over 2 of the largest coal-fired power plants in the US (rated at 30,000 thousand MWhr per year).

If solar panels were installed on all new single-ply roofing each year, it would be the equivalent of building two of the largest conventional generating plants each year.

An alternative option would be to look at the total existing low slope commercial roof area in the US. Few estimates exist, but an NREL study published in 2016 suggested the following:

  • Medium size buildings, with roof areas of between 5,000 and 25,000 square feet account for a total roof area of 13,132 million square feet.
  • Large size buildings, with roof areas of greater than 25,000 square feet account for a total roof area of 21,420 million square feet.

Taken together, this suggests that, excluding small buildings, the total low slope roof area in the US is 34,552 million square feet or 1,239.38 sq.miles. This includes all membrane types. How much power could be produced if all of those roofs were equipped with solar arrays? Using the same assumptions as before, and based on today's solar panels:

  • If solar was installed on this area of roofing, then it would potentially provide 34,552 x 106 roof sq.ft. / 44.0589 sq.ft./MWhr = 784,000 thousand MWhr/yr of power.
  • This would equate to 19.5% of the annual total US electricity demand.
  • It would equate to 58.1% of total commercial electricity demand in the US.

Advantages of Roof-Based Solar Power

Roof-based solar power can produce power close to actual demand. As shown above, requiring solar panels on all new single-ply roofing, or better yet, on all existing medium and large sized commercial roofs, would go a long way towards satisfying US electricity demand. Installing solar panels on all new single ply roofing would be equivalent to adding two large conventional power plants each year. Solar power generated from panels installed on all medium and large low slope roofs, would satisfy 58% of the US commercial demand.  Granted, it might take a couple of decades to install rooftop solar as we are reroofing our buildings, but the opportunity for long-term renewable energy sources is right above our heads. Finally, solar power produced on rooftops can be an important part of improving a building's resilience. When coupled with electric storage, it could be used to power critical parts of a buildings infrastructure for significant periods of time during a storm-caused grid outage.

About the Author

Thomas J Taylor, PhD is the Building & Roofing Science Advisor for GAF. Tom has over 20 year’s experience in the building products industry, all working for manufacturing organizations. He received his PhD in chemistry from the University of Salford, England, and holds approximately 35 patents. Tom’s main focus at GAF is roofing system design and building energy use reduction. Under Tom’s guidance GAF has developed TPO with unmatched weathering resistance.

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Thermal Bridging Through Roof Fasteners: Why the Industry Should Take Note

What is going on here?No, this roof does not have measles, it has a problem with thermal bridging through the roof fasteners holding its components in place, and this problem is not one to be ignored.As building construction evolves, you'd think these tiny breaches through the insulating layers of the assembly, known as point thermal bridges, would matter less and less. But, as it happens, the reverse is true! The tighter and better-insulated a building, the bigger the difference all of the weak points, in its thermal enclosure, make. A range of codes and standards are beginning to address this problem, though it's important to note that there is often a time lag between development of codes and their widespread adoption.What Is the Industry Doing About It?Long in the business of supporting high-performance building enclosures, Phius (Passive House Institute US) provides a Fastener Correction Calculator along with a way to calculate the effect of linear thermal bridges (think shelf angles, lintels, and so on). By contrast, the 2021 International Energy Conservation Code also addresses thermal bridging, but only considers framing materials to be thermal bridges, and actually pointedly ignores the effects of point loads like fasteners in its definition of continuous insulation: "insulation material that is continuous across all structural members without thermal bridges other than fasteners and service openings" (Section C202). Likewise, The National Energy Code of Canada for Buildings: 2020 addresses thermal bridging of a number of building components, but also explicitly excludes fasteners: "in calculating the overall thermal transmittance of assemblies…fasteners need not be taken into account" (Section 3.1.1.7.3). Admittedly, point thermal bridges are often excluded because it is challenging to assess them with simple simulation tools.Despite this, researchers have had a hunch for decades that thermal bridging through the multitude of fasteners often used in roofs is in fact significant enough to warrant study. Investigators at the National Bureau of Standards, Oak Ridge National Laboratory, the National Research Council Canada, and consulting firms Morrison Hershfield and Simpson Gumpertz & Heger (SGH), have conducted laboratory and computer simulation studies to analyze the effects of point thermal bridges.Why Pay Attention Now?The problem has been made worse in recent years because changes in wind speeds, design wind pressures, and roof zones as dictated by ASCE 7-16 and 7-22 (see blogs by Jim Kirby and Kristin Westover for more insight), mean that fastener patterns are becoming denser in many cases. This means that there is more metal on average, per square foot of roof, than ever before. More metal means that more heat escapes the building in winter and enters the building in summer. By making our buildings more robust against wind uplift to meet updated standards, we are in effect making them less robust against the negative effects of hot and cold weather conditions.So, how bad is this problem, and what's a roof designer to do about it? A team of researchers at SGH, Virginia Tech, and GAF set out to determine the answer, first by simplifying the problem. Our plan was to develop computer simulations to accurately anticipate the thermal bridging effects of fasteners based on their characteristics and the characteristics of the roof assemblies in which they are used. In other words, we broke the problem down into parts, so we could know how each part affects the problem as a whole. We also wanted to carefully check the assumptions underlying our computer simulation and ensure that our results matched up with what we were finding in the lab. The full paper describing our work was delivered at the 2023 IIBEC Convention and Trade Show, but here are the high points, starting with how we set up the study.First, we began with a simple 4" polyisocyanurate board (ISO), and called it Case A-I.Next, we added a high-density polyisocyanurate cover board (HD ISO), and called that Case A-II.Third, we added galvanized steel deck to the 4" polyiso, and called that Case A-III.Finally, we created the whole sandwich: HD ISO and ISO over steel deck, which was Case A-IV.Note that we did not include a roof membrane, substrate board, air barrier, or vapor retarder in these assemblies, partly to keep it simple, and partly because these components don't typically add much insulation value to a roof assembly.The cases can be considered base cases, as they do not yet contain a fastener. We needed to simulate and physically test these, so we could understand the effect that fasteners have when added to them.We also ran a set of samples, B-I through B-IV, that corresponded with cases A-I through A-IV above, but had one #12 fastener, 6" long, in the center of the 2' x 2' assembly, with a 3" diameter insulation plate. These are depicted below. The fastener penetrated the ISO and steel deck, but not the HD ISO.One visualization of the computer simulation is shown here, for Case B-IV. The stripes of color, or isotherms, show the vulnerability of the assembly at the location of the fastener.What did we find? The results might surprise you.First, it's no surprise that the fastener reduced the R-value of the 2' x 2' sample of ISO alone by 4.2% in the physical sample, and 3.4% in the computer simulation (Case B-I compared to Case A-I).When the HD ISO was added (Cases II), R-value fell by 2.2% and 2.7% for the physical experiment and computer simulation, respectively, when the fastener was added. In other words, adding the fastener still caused a drop in R-value, but that drop was considerably less than when no cover board was used. This proved what we suspected, that the HD ISO had an important protective effect against the thermal bridging caused by the fastener.Next, we found that the steel deck made a big difference as well. In the physical experiment, the air contained in the flutes of the steel deck added to the R-value of the assembly, while the computer simulation did not account for this effect. That's an item that needs to be addressed in the next phase of research. Despite this anomaly, both approaches showed the same thing: steel deck acts like a radiator, exacerbating the effect of the fastener. In the assemblies with just ISO and steel deck (Cases III), adding a fastener resulted in an R-value drop of 11.0% for the physical experiment and 4.6% for the computer simulation compared to the assembly with no fastener.Finally, the assemblies with all the components (HD ISO, ISO and steel deck, a.k.a. Cases IV) showed again that the HD ISO insulated the fastener and reduced its negative impact on the R-value of the overall assembly. The physical experiment had a 6.1% drop (down from 11% with no cover board!) and the computer simulation a 4.2% drop (down from 4.6% with no cover board) in R-value when the fastener was added.What Does This Study Tell Us?The morals of the study just described are these:Roof fasteners have a measurable impact on the R-value of roof insulation.High-density polyisocyanurate cover boards go a long way toward minimizing the thermal impacts of roof fasteners.Steel deck, due to its high conductivity, acts as a radiator, amplifying the thermal bridging effect of fasteners.What Should We Do About It?As for figuring out what to do about it, this study and others first need to be extended to the real world, and that means making assumptions about parameters like the siting of the building, the roof fastener densities required, and the roof assembly type.Several groups have made this leap from looking at point thermal bridges to what they mean for a roof's overall performance. The following example was explored in a paper by Taylor, Willits, Hartwig and Kirby, presented at the RCI, Inc. Building Envelope Technology Symposium in 2018. In that paper, the authors extended computer simulation results from a 2015 paper by Olson, Saldanha, and Hsu to a set of actual roofing scenarios. They found that the installation method has a big impact on the in-service R-value of the roof.They assumed a 15,000-square-foot roof, fastener patterns and densities based on a wind uplift requirement of 120 pounds per square foot, and a design R-value of R-30. In this example, a traditional mechanically attached roof had an in-service R-value of only R-25, which is a 17% loss compared to the design R-value.An induction-welded roof was a slight improvement over the mechanically attached assembly, with an in-service value of only R-26.5 (a 12% loss compared to the design R-value).Adhering instead of fastening the top layer of polyiso resulted in an in-service R-value of R-28.7 (a 4% loss compared to the design R-value).Finally, in their study, an HD polyiso board was used as a mechanically fastened substrate board on top of the steel deck, allowing both layers of continuous polyiso insulation and the roof membrane to be adhered. Doing so resulted in an in-service R-value of R-29.5, representing only a 1.5% loss compared to the design R-value.To operationalize these findings in your own roofing design projects, consider the following approaches:Consider eliminating roof fasteners altogether, or burying them beneath one or more layers of insulation. Multiple studies have shown that placing fastener heads and plates beneath a cover board, or, better yet, beneath one or two layers of staggered insulation, such as GAF's EnergyGuard™ Polyiso Insulation, can dampen the thermal bridging effects of fasteners. Adhering all or some of the layers of a roof assembly minimizes unwanted thermal outcomes.Consider using an insulating cover board, such as GAF's EnergyGuard™ HD or EnergyGuard™ HD Plus Polyiso cover board. Installing an adhered cover board in general is good roofing practice for a host of reasons: they provide enhanced longevity and system performance by protecting roof membranes and insulation from hail damage; they allow for enhanced wind uplift and improved aesthetics; and they offer additional R-value and mitigate thermal bridging as shown in our recent study.Consider using an induction-welded system that minimizes the number of total roof fasteners by dictating an even spacing of insulation fasteners. The special plates of these fasteners are then welded to the underside of the roof membrane using an induction heat tool. This process eliminates the need for additional membrane fasteners.Consider beefing up the R-value of the roof insulation. If fasteners diminish the actual thermal performance of roof insulation, building owners are not getting the benefit of the design R-value. Extra insulation beyond the code minimum can be specified to make up the difference.Where Do We Go From Here?Some work remains to be done before we have a computer simulation that more closely aligns with physical experiments on identical assemblies. But, the two methods in our recent study aligned within a range of 0.8 to 6.7%, which indicates that we are making progress. With ever-better modeling methods, designers should soon be able to predict the impact of fasteners rather than ignoring it and hoping for the best.Once we, as a roofing industry, have these detailed computer simulation tools in place, we can include the findings from these tools in codes and standards. These can be used by those who don't have the time or resources to model roof assemblies using a lab or sophisticated modeling software. With easy-to-use resources quantifying thermal bridging through roof fasteners, roof designers will no longer be putting building owners at risk of wasting energy, or, even worse, of experiencing condensation problems due to under-insulated roof assemblies. Designers will have a much better picture of exactly what the building owner is getting when they specify a roof that includes fasteners, and which of the measures detailed above they might take into consideration to avoid any negative consequences.This research discussed in this blog was conducted with a grant from the RCI-IIBEC Foundation and was presented at IIBEC's 2023 Annual Trade Show and Convention in Houston on March 6. Contact IIBEC at https://iibec.org/ or GAF at BuildingScience@GAF.com for more information.

By Authors Elizabeth Grant

November 17, 2023

Rolling out cooling GAF Streetbond® coating in blue and white, Pacoima, L.A.
In Your Community

Creating Net-Positive Communities: GAF Taking Action to Drive Carbon Reduction

Companies, organizations, and firms working in the building, construction, and design space have a unique opportunity and responsibility. Collectively, we are contributing to nearly 40% of energy-related carbon emissions worldwide. While the goals, commitments, pledges, and promises around these challenges are a step in the right direction, no one entity alone will make major improvements to this daunting issue.We need to come together, demonstrate courageous change leadership, and take collective approaches to address the built environment's impacts on climate. Collectively, we have a unique opportunity to improve people's lives and make positive, measurable changes to impact:Buildings, homes, and hardscapesCommunity planningConsumer, commercial, and public sector behaviorOur Collective Challenge to Reduce our Carbon FootprintAccording to many sources, including the U.S. Green Building Council (USGBC), the built environment accounts for 39% of global energy-related carbon emissions worldwide. Operational emissions from buildings make up 28% and the remaining 11% comes from materials and construction.By definition, embodied carbon is emitted by the manufacture, transport, and installation of construction materials, and operational carbon typically results from heating, cooling, electrical use, and waste disposal of a building. Embodied carbon emissions are set during construction. This 11% of carbon attributed to the building materials and construction sector is something each company could impact individually based on manufacturing processes and material selection.The more significant 28% of carbon emissions from the built environment is produced through the daily operations of buildings. This is a dynamic that no company can influence alone. Improving the energy performance of existing and new buildings is a must, as it accounts for between 60–80% of greenhouse gas emissions from the building and construction sector. Improving energy sources for buildings, and increasing energy efficiency in the buildings' envelope and operating systems are all necessary for future carbon and economic performance.Why It Is Imperative to Reduce our Carbon Emissions TodayThere are numerous collectives that are driving awareness, understanding, and action at the governmental and organizational levels, largely inspired by the Paris Agreement enacted at the United Nations Climate Change Conference of Parties (COP21) in 2015. The Architecture 2030 Challenge was inspired by the Paris Agreement and seeks to reduce climate impacts from carbon in the built environment.Since the enactment of the Paris Agreement and Architecture 2030 Challenge, myopic approaches to addressing carbon have prevailed, including the rampant net-zero carbon goals for individual companies, firms, and building projects. Though these efforts are admirable, many lack real roadmaps to achieve these goals. In light of this, the US Security and Exchange Commission has issued requirements for companies, firms, and others to divulge plans to meet these lofty goals and ultimately report to the government on progress in reaching targets. These individual actions will only take us so far.Additionally, the regulatory environment continues to evolve and drive change. If we consider the legislative activity in Europe, which frequently leads the way for the rest of the world, we can all expect carbon taxes to become the standard. There are currently 15 proposed bills that would implement a price on carbon dioxide emissions. Several states have introduced carbon pricing schemes that cover emissions within their territory, including California, Oregon, Washington, Hawaii, Pennsylvania, and Massachusetts. Currently, these schemes primarily rely on cap and trade programs within the power sector. It is not a matter of if but when carbon taxes will become a reality in the US.Theory of ChangeClimate issues are immediate and immense. Our industry is so interdependent that we can't have one sector delivering amazing results while another is idle. Making changes and improvements requires an effort bigger than any one organization could manage. Working together, we can share resources and ideas in new ways. We can create advantages and efficiencies in shared R&D, supply chain, manufacturing, transportation, design, installation, and more.Collaboration will bring measurable near-term positive change that would enable buildings and homes to become net-positive beacons for their surrounding communities. We can create a network where each building/home has a positive multiplier effect. The network is then compounded by linking to other elements that contribute to a community's overall carbon footprint.Proof of Concept: GAF Cool Community ProjectAn estimated 85% of Americans, around 280 million people, live in metropolitan areas. As the climate continues to change, many urban areas are experiencing extreme heat or a "heat island effect." Not only is excess heat uncomfortable, but heat islands are public health and economic concerns, especially for vulnerable communities that are often most impacted.Pacoima, a neighborhood in Los Angeles, was selected by a consortium of partners as a key community to develop a first-of-its-kind community-wide research initiative to understand the impacts various cooling solutions have on urban heat and livability. Pacoima is a lower income community in one of the hottest areas in the greater Los Angeles area. The neighborhood represents other communities that are disproportionately impacted by climate change and often underinvested in.Implementation:Phase 1: This included the application of GAF StreetBond® DuraShield cool, solar-reflective pavement coatings on all ground-level hard surfaces, including neighborhood streets, crosswalks, basketball courts, parking lots, and playgrounds. The project also includes a robust community engagement process to support local involvement in the project, measure qualitative and quantitative impact on how cooling improves living conditions, and ensure the success of the project.Phase 2: After 12 months of monitoring and research, GAF and partners will evaluate the impact of the cool pavements with the intent to scale the plan to include reflective roofing and solar solutions.This ongoing project will allow us to evaluate for proof of concept and assess a variety of solutions as well as how different interventions can work together effectively (i.e., increasing tree canopies, greenspacing, cool pavements, cool roofs, etc.). Through community-wide approaches such as this, it's possible that we could get ahead of the legislation and make significant innovative contributions to communities locally, nationally, and globally.GAF Is Taking Action to Create Community-wide Climate SolutionsWith collaboration from leaders across the building space and adjacent sectors, we believe it is possible to drive a priority shift from net neutral to net positive. Addressing both embodied and operational carbon can help build real-world, net-positive communities.We invite all who are able and interested in working together in the following ways:Join a consortium of individuals, organizations, and companies to identify and develop opportunities and solutions for collective action in the built environment. The group will answer questions about how to improve the carbon impacts of the existing and future built environment through scalable, practical, and nimble approaches. Solutions could range from unique design concepts to materials, applications, testing, and measurement so we can operationalize solutions across the built environment.Help to scale the Cool Community project that was started in Pacoima. This can be done by joining in with a collaborative and collective approach to climate adaptation for Phase 2 in Pacoima and other cities around the country where similar work is beginning.Collaborate in designing and building scientific approaches to determine effective carbon avoidance—or reduction—efforts that are scalable to create net-positive carbon communities. Explore efforts to use climate adaptation and community cooling approaches (i.e., design solutions, roofing and pavement solutions, improved building envelope technologies, green spacing, tree coverage, and shading opportunities) to increase albedo of hard surfaces. Improve energy efficiency to existing buildings and homes and ultimately reduce carbon at the community level.To learn more and to engage in any of these efforts, please reach out to us at sustainability@gaf.com.

By Authors Jennifer Keegan

May 31, 2023

GAF Building and Roofing Science Team
Building Science

Developing Best Practice Solutions for GAF and Siplast Customers

With any roofing project, there are a number of factors to consider when choosing the right design: sustainability profile, potential risks, overall performance, and more. Our Building and Roofing Science (BRS) team specializes in working with industry professionals to help them enhance their roof designs across all of these areas. Leveraging their building enclosure expertise, our BRS team serves as thought leaders and collaborators, helping design professionals deliver better solutions for their customers."We're a consultant's consultant. Basically, we're a sounding board for them," explains Jennifer Keegan, Director of Building and Roofing Science. Rather than solely providing product specifications and tactical support, the BRS team partners with consultants, specifiers, and architects to provide guidance on designing high-performing roofs that don't just meet code, but evolve their practices and thinking. For example, this might include understanding the science behind properly placed air and vapor retarders.As experts in the field, our BRS team members frequently attend conferences to share their expertise and findings. As Jennifer explains, "Our biggest goal is to help designers make an informed decision." Those decisions might be in a number of areas, including the building science behind roof attachment options, proper placement of air and vapor retarders, and how a roof can contribute to energy efficiency goals.Expanding the BRS TeamOur BRS team is accessible nationwide to look at the overall science of roof assembly and all of the components and best practices that make up a high-performance, low-risk, and energy-efficient roof. Our regional experts are positioned strategically to better serve our customers and the industry as a whole. We have the capacity to work with partners across the country on a more personalized level, providing guidance on roof assembly, membrane type, attachment method, or complicated roof details including consideration of the roof to wall interface.Partnering with the Design Services TeamIn addition to our newly expanded BRS team, GAF also offers support through its Design Services team. This group helps with traditional applications, installations, and system approvals. GAF's Design Services team is a great resource to answer any product questions, help you ensure your project meets applicable code requirements, assess compatibility of products, outline specifications, and assist with wind calculations. By serving as the front line in partnership with our BRS team, the Design Services team can help guide the design community through any phase of a project.GAF's Building and Roofing Science team is the next step for some of those trickier building projects, and can take into consideration air, vapor, and thermal requirements that a designer might be considering for their roof assembly. Through a collaborative process, our BRS team seeks to inspire project teams, as Jennifer explains, "to do it the best way possible."Engaging with the TeamsGAF has the support you need for any of your design and roofing science needs. To request support from the GAF Design Services team, you can email designservices@gaf.com. For additional support from our Building and Roofing Science team regarding specialty installations or how a building can be supported by enhanced roof design, contact us at buildingscience@gaf.com.Our Building and Roofing Science team is always happy to support you as you work through complex jobs. You can also sign up to join their office hours here.

By Authors GAF Roof Views

May 08, 2023

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