In an effort to help elevate the building envelope profession, this page brings together a wealth of knowledge by respected industry professionsals. If you are interested in becoming a contributor please contact us. We are currently interested in gaining additional perspective from contractors.


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Dr. M. Steven Doggett is the Principal Scientist and founder of Built Environments, Inc. an architectural & building science consulting firm specializing in building enclosure design. His background includes extensive field experience in analyzing complex building enclosure failures, particularly those involving air, heat, and moisture transport. He combines this experience set with innovative design practices to assist multi-stakeholders achieve resilient, higher-performing buildings.

Dr. Doggett is actively engaged in enclosure design, material & product research, and architectural applications in computational fluid dynamics, 3-D thermal modeling, and hygrothermal modeling.

He has served as the principal scientist on hundreds of projects involving all markets and all building types. He also serves as a technical consultant for building product design, development, and continuing education.

M. Steven Doggett, Ph.D. LEED AP 
Principal Scientist at Built Environments


Dr. Aksamija is an Associate Professor at the Univ. of Massachusetts Amherst and Building Technology Researcher/Associate at Perkins + Will. She directed Perkins + Will Building Technology Lab ("Tech Lab"), which was founded in 2008 as one of the first practice-based research centers focused on advanced building technologies. Her research expertise includes building science and sustainability, emerging technologies, digital design and representations, and information modeling.

She is the author of books, "Sustainable Facades: Design Methods for High-Performance Building Envelopes" and "Integrating Innovation in Architecture: Design, Methods and Technology for Progressive Practice and Research", published by John Wiley & Sons. She has authored over seventy research articles and publications, and is a frequent speaker at scientific and industry-based conferences. She is the founder and editor of Perkins+Will Research Journal, one of the first research journals coming from architectural practice.

Ajla Aksamija, Ph.D
Associate Professor, University of Massachusettes


John Straube, Ph.D., P.Eng., is a Principal at RDH Building Science and RDH Building Science Laboratories, where he conducts forensic investigations, assists with the design of new high performance buildings, and leads research projects in the areas of low-energy building design, building enclosure performance, hygrothermal analysis, and field performance monitoring. Dr. Straube is also a cross-appointed faculty member in the School of Architecture and the Department of Civil and Environmental Engineering at the University of Waterloo.

A Principal at Building Science Corporation from 2006 to 2013, Dr Straube is the author or co-author of over 100 published technical papers, author of the book High Performance Enclosures and co-author, with Eric Burnett, of Building Science for Building Enclosures. Dr. Straube’s leadership as a building scientist and an educator has been recognized with multiple awards, including the Lifetime Achievement Award in Building Science Education from the National Consortium of Housing Research Centers (NCHRC).

John Straube, P.Eng., Ph.D
Associate Professor, University of Waterloo & Principal
at RDH Building Science

Link to Articles

Patrick manages the Building Performance Analysis (BPA) department at Morrison Hershfield with over 15 years of consulting experience related to building science and building envelope energy efficiency.  Patrick’s focus in recent years has been providing tools and guidance to industry to help practitioners make design decisions related to constructability, thermal, structural, energy, and hygrothermal performance.  His field experience, monitoring and investigations of existing buildings, computer analysis of building envelopments components and systems, and development work is leveraged on new-construction projects to set realistic and practical expectations for building envelope performance. 

Patrick has led several successful landmark projects related to providing timely industry guidance, such as ASHRAE RP-1365 Thermal Performance of Building Envelope Details for Mid- and High-Rise Buildings, Building Envelope Thermal Bridging (BETB) Guide, the Attic Ventilation and Moisture Research Study, and Guide to Low Thermal Energy Demand for Large Buildings (Low TEDI Guide). 

Patrick Roppel, M.A.Sc., P.Eng. 
Principal Building Scientist Specialist and Department Head
at Morrison Hershfield