Welcome to TEGNOS Research!
TEGNOS Research was founded  in 2007 by Dr. Jim Hoff  to provide professional services to the building envelope industry, with an emphasis on research, education, and advocacy. Please browse our
published research materials and please contact us whenever your organization needs assistance in  "Understanding of the Building Envelope."
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Follow TEGNOS in Roofing Contractor:
December, 2017: Planning for a Sustainable 2018
November, 2017: Navigating Low-VOC Bonding Adhesives
October, 2017: Sustainable Metal Roofing Gains in Popularity
September, 2017: Cool Roof Coatings and Urban Heat Islands
August, 2017: Advancing Women in Roofing
July, 2017: Building a Sustainable Roofing Business with Software
June, 2017: Building a Sustainable Maintenance Business
May, 2017: Tools for Improved Roof Safety
April, 2017: Shingle Recycling Update
March, 2017: Sustainability during Labor Shortages
February, 2017: Sustainability and Corporate Social Responsibility
January, 2017: The Sustainable State of the Roofing Industry
December, 2016: New Improvements to Online Roofing Technology
November, 2016: Lighting up Profits with Daylighting
October, 2016: The Sustainable Metal Roofing Contractor
September, 2016: Hats off to the RCMA
August, 2016: Selling Sustainability Under the Roof
July, 2016: Sustainable Roofing? There's an App for That!
June, 2016: The Sustainable Season of Roofing Adhesives
May, 2016: Building Business with Safety
April, 2016: How Does Your Roof Garden (Business) Grow?
March, 2016: Standing Up For Sustainable Tools
February 26, 2016: Sometimes, It's What's Underneath That Matters
January, 2016: More Than Just a Single Ply
December, 2015: Roofing Tops the List of Sustainable Products
November, 2015: The Best Source for Daylighting
October, 2015: Sustainable Roofing Warranties
September, 2015: A Guide to Asphalt Shingle Recycling
August, 2015: Roofing Manufacturers Join the EPD Movement
July, 2015: Building Sustainability Through Opportunity
June, 2015: Marketing Sustainable Roofing on Your Website
May, 2015: Sustainable Roofing: How People Fit In
April, 2015: The Sustainable Roof Cover Board
March, 2015: Measuring the ROEE of Sustainable Roof Insulation
January, 2015: Thirty Years Back - And Thirty Years Forward
December, 2014: The Newest Cool Roofing Benefit
August, 2014: Resilient Roofing Takes Center Stage
May, 2014: Three Key Questions about Green Roofing
April, 2014: Learning from Disaster
March, 2014: Playing a Leading Role in Energy Codes
February, 2014: Raising the Bar for Roofing Professionalism
January, 2014: RoofPoint Continues to Grow and Impress
October, 2013: A New Level of Roofing Professionalism
August, 2013: Shining a Light on Daylighting
May, 2013: Turning Green into the Black
March, 2013: An "All of the Above" Strategy for Rooftop Solar
January, 2013: Cutting Through Code Confusion
December, 2012:Thanks for Making RoofPoint a Success
November, 2012: Is This a LEED Roof?
October, 2012: Hats Off to the Metal Roofing Contractor
September, 2012: Going Back to School for Sustainability
August, 2012: Tops in Sustainability
July, 2012: Your Green Roofing Partner
June, 2012: 90% Inspiration, 10% Perspiration
April, 2012: Recognizing Cool Roofs...Plus
March, 2012: Sustainable Roofing: It's About People, Too
February, 2012:Summing Up Sustainability with RoofPoint
January, 2012: Sustainable Roofs: Do We Have the Reasons!
Reflective Roofs and Urban Heat Islands:
Protecting People, the Environment, and the Economy

Most environmental researchers agree that urban heat islands pose a significant problem,
negatively affecting the world economy, environment, public safety, and human health. Based
on a review of the available strategies to mitigate the negative consequences of the heat
island effect, this article also suggests that reflective roofs offer the most feasible and cost-
effective way to immediately start improving conditions in urban heat islands. Finally, the
article suggests that cool reflective roofs, when designed and installed correctly, may provide
many years of useful service while reducing heat island impacts at the same time.
New Energy and Carbon Calculator for Roofing
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 2014
International Roof Coatings Conference in Baltimore, MD.. During an educational session at the conference, Dr. Jim Hoff of TEGNOS Research discussed how the RoofPoint rating system has been
used as a template to develop a comprehensive modeling tool to measure the energy savings as well as atmospheric carbon reduction of sustainable roofing systems.

Roof Surface Thermal Contribution: A New Way to Evaluate Cool Roofs
As part of the RoofPoint rating 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.

Achieving Sustainability Through Durability, Adaptability and Deconstructability
Sustainable buildings (and roofs) must not only be designed to reduce the environmental impacts of construction and use. They must also be designed with the durability and adaptability to provide a
long and useful service life of at least 50 years or more. In addition, they must be designed to be disassembled in a way that facilitates recycling and reuse. Dirk Kestner and Mark Webster, both
Professional Engineers and LEED APs at Simpson Gumpertz & Hager have recently published an excellent overview of the key concepts of Design For Durability (DfDr), Design for Adaptability (DfA) and
Design for Deconstruction (DfD).

Moisture: The Hidden Risk of Green Buildings
"Yesterday’s seal of approval for new products was 'It was developed by NASA'. Today the seal of approval is: 'it’s LEED certified.' Just as 'NASA-developed' was no guarantee of success, neither is LEED-
certified any assurance of no problems, especially those problems related to moisture accumulation."
If you think this quote was made by a disgruntled roofing researcher, you'd be wrong! The quotation
comes from a new monograph published by the National Council of Architectural Registration Boards (NCARB).  It would appear that leaders in the architectural community are becoming concerned
about the hidden risk of moisture in sustainable construction.
New R-Value Guide for the 2015 I-Codes
Since 1994, the International Codes, or I-Codes, have served as models for almost all state  
and local codes in the United States. The 2015 edition of the I-Codes includes several
landmark advances in building energy efficiency and sustainability. Not only does the 2015
International Energy Conservation Code (IECC) include new and higher standards for almost
every component in the building envelope, but these standards are further increased in the
new International Green Construction Code (IgCC), which is intended to serve as an overlay
code, or “above the code” standard for sustainable buildings.  In an effort to improve
understanding of these new code requirements, the Center for Environmental Innovation in
Roofing (CEIR),  the Polyisocyanurate Insulation Manufacturers Association (PIMA), and the
Institute for Market Transformation have published a stand-alone Roof and Wall Thermal
Design Guide that can be used by building designers and contractors to make the best
insulation decisions for both new buildings and existing building retrofits
The Emergence of Disclosure in Green Building
One of the newest tools to be integrated into the selection of sustainable building materials is
the Environmental Product Declaration or EPD. And while almost everyone associated with
the building envelope industry has become aware of this new tool, few industry stakeholders
have had the opportunity to learn about the specifics of how EPDs are developed and how
they may be used. What exactly is an EPD? Why are EPDs important? Who is promoting the
use of EPDs? Where will the use of EPDs and other product declarations go in the future?
And most importantly, how will EPDs affect the practice of building envelope professionals?
This article from the November 2015 issue of
Construction Specifier provides the answers to
these important questions.
Hidden Benefit of Cool Roofs: Reduced Peak Demand
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.
Roofing's Nine Roles in Resilience
The Resilient Design Institute identifies resilience as “the capacity to adapt to changing
conditions and to maintain or regain functionality and vitality in the face of distress or
disturbance.” This approach encompasses environmental as well as economic and social
considerations. Resilience goes beyond durability to redundancy and back-ups. It focuses on
extreme weather as well as power outages and transportation interruptions. It encompasses
safety and comfort for occupants and production of power, lighting and water. In the pursuit of
resilience, nine strategies can be applied to roofing. Some of these strategies are familiar,
some are emerging, but all can work together.