TEGNOS Green Building Research
New Heat Mitigation and Water Retention Concepts to Expand Green Roofing Demand
Proceedings of the Seventh Annual Green Rooftops for Sustainable Communities Convention, Atlanta, GA,
2009. This paper provides a brief review of recent research pointing to potential economic and environmental
benefits of ballasted roofing systems when used in conjunction with green roofing systems. In addition, the
paper offers suggestions for future research that could help building owners and designers optimize the
benefits of green roof and  ballasted roofs in their design and selection of roofing systems.
The Economics of Cool Roofing: A Local and Regional Approach
Proceedings of Cool Roofing: Cutting through the Glare Symposium, Atlanta, GA, 2005. Do cool roofs provide
uniform energy and environmental benefits throughout all regions of the United States? This paper identifies
critical climatic and economic factors that  may influence cool roof selection and performance.
Life Cycle Assessment (LCA) and the Building Envelope: Balancing Durability and Environmental
Impact.  Proceedings of the Symposium on Building Envelope Sustainability, Washington, DC, 2009.
Historically, the construction industry has traditionally relied upon Life Cycle Cost (LCC) with its emphasis on
product durability, as the best measure of long-term value.  As the  industry moves to Life Cycle Assessment
(LCA) with its emphasis on environmental impact, some industry stakeholders are concerned that the new LCA
approach may place too little emphasis on product durability. After a brief review of the history of this new
approach to evaluating products over their life cycle, this paper reviews the relationship between LCA and
product durability and offers suggestions for best industry practices in implementing LCA as an integral part of
building envelope design.
Cool Surfaces and Other Green Options
Green Rating Systems
Equivalent Uniform Annual Cost: A New Approach to Roof Life Cycle Analysis
Proceedings of the RCI 21st International Convention, Phoenix, AZ, 2006.  Traditional Life Cycle Cost Analysis
can be used to compare the benefits of different building materials with the same service life. But what if the
design professional needs to compare alternative products with
different service lives? Equivalent Uniform
Annual Cost (EUAC) provides a simple and compelling answer by comparing the relative "annual payments" for
each alternative.
Managing Sustainability Through Durability Planning
The Durability Planning Matrix: A Useful Tool for Achieving Sustainable Building Envelopes
Proceedings of the RCI 25th International Convention, Orlando, FL, 2010. Durability Planning is a
process-based approach to building envelope durability. Grounded in on definition of durability embodied in
the Canadian Standards Association Guideline on Durability in Buildings (CSA S-4875, 2001), Durability
Planning provides a conceptual framework to identify the critical determinants of durability, propose
strategies to minimize the effects of these determinants, and develop an action plan and timetable to
implement these strategies.
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An Outcome-Based Multi-Variate Approach to Roof Surface Thermal Contribution
program for sustainable roofing systems, the Center for Environmental Innovation in Roofing has developed a
unique approach to the selection of energy-efficient roof surfaces.  This new approach, called Roof Surface
Thermal Contribution, approach employs a multivariate matrix of desired outcomes, key roof surface features
and different climate characteristics to help building designers select the optimal roof system for a particular
building location and function.
A New Environmental Assessment Tool For Roofing Systems
Proceedings of the 2011 International Roofing Symposium, Washington, DC, 2011. In an effort to support the
sustainable design and management of the billions of square feet of new roofing assets installed each year in
North America, the Center for Environmental Innovation in Roofing (CEIR) has developed the RoofPoint™
Environmentally Innovative Guideline for Roofing Systems. Organized around five primary categories of
energy, materials, water, life-cycle and innovation, RoofPoint provides a comprehensive roadmap for the
design, installation and operation of environmentally optimal roofing systems. Starting with a brief overview of
the history and mission of RoofPoint, this paper discusses how RoofPoint may serve as an ongoing decision
model, asset management tool, educational framework and research agenda for the roofing industry.
The Green Life Cycle
Energy Efficiency / Clean Energy
A New Roof Energy and Carbon Calculator
Proceedings of the RCI 28th International Convention, Orlando, FL, 2013. All roofing professionals share a
common goal of delivering roofing systems offering tangible value. Unfortunately, few tools are available to
quantify the benefits of a sustainable roof system design. In an effort to assist roofing professionals
interested in measuring the energy and environmental benefits of modern roof system technologies, the
Center for Environmental Innovation in Roofing  has developed a new modeling tool based on the energy-
related credits of the RoofPoint rating system. This new tool – the RoofPoint Energy and Carbon Calculator –
was introduced at the 28th RCI International Convention and Trade Show in Orlando, Florida. During an
educational session at the convention, Dr. Jim Hoff discussed how the RoofPoint rating system has been used
as a template to develop a comprehensive modeling tool to measure the energy-related roof system benefits
of sustainable roofing systems, including energy savings as well as atmospheric carbon reduction.
Transparency and Product Disclosure
Disclosure: The Newest Concept in Green Building.  Architectural Roofing & Waterproofing, Winter,
2014. With the development of the latest green building standards and guidelines such as LEED®, ASHRAE
189.1, and the International Green Building Code, new concepts are emerging to report and document the
sustainability of the products used in green buildings. These new concepts include Environmental Product
Declarations (EPDs), Health Product Declarations (HPDs), as well as a number of multi-attribute product
standards developed by ASTM, ANSI, and others. Because of the wide variety of materials required to
construct the exterior skin of the building, the building envelope industry faces a daunting task of
understanding and adapting to these new concepts.  This paper is intended as a guide through the new
jargon of product disclosure and provide a roadmap for organizations to adapt and thrive in the new era of
material transparency
Reducing Peak Electrical Demand: A Hidden Benefit of Cool Roofs
Building Envelope, Winter, 2015. A sharp peak in electrical demand can be observed in almost every
commercial building during the busiest hours of the day. This peak in air conditioning requires additional
power plant capacity, causes imbalances in the power grid, and may result in increased air pollution. But
most importantly, peak demand may result in monthly charges much higher than base electrical rates.  One of
the best approaches to shrink peak demand is to reduce the heat load on a building, especially the solar
loads that drive the need for air conditioning.  And few heat reduction strategies can match the potential of
modern cool roofing technology. This CEU-approved article provides a step-by-step review of all aspects of
peak demand reduction, including how to identify peak demand charges on a typical commercial electrical bill,
how to estimate the potential savings achieved by installing a cool roof, and what other benefits may be
achieved by reducing peaks in energy demand savings.
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