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ABAA Approved Speakers

List of approved ABAA speakers



Len Anastasi worked in the construction industry for twenty years in masonry, waterproofing and restoration work. He currently owns EXO-TEC Manufacturing, Inc. which manufactures specialty construction products, EXO-TEC Solutions, Inc. which performs marketing work for various quality and innovative manufacturers of construction products and EXO-TEC Consulting, Inc. which performs consulting services on building enclosure issues for building owners, managers, design professionals and lawyers. In his construction and consulting work, he has performed inspections and / or repairs on over 300 buildings as well as giving expert testimony in trials and reviews on dozens of legal cases. He is a member of ASTM’s E 06 Committee on Building Performance where he has authored both proposed standards as well as proposed changes to existing standards. He is a member of the Boston Society of Architects’ Building Enclosure Council where he has presented on several topics and has been sponsored to speak at the Build Boston Exposition, AIA National Convention and CSI National Convention. He has authored several articles and papers on building enclosure performance and has spoken on these topics at several conventions, seminars and meeting. He is a member of the Construction Specification Institute (CSI), the International Concrete Repair Institute (ICRI) and the U. S. Government’s Building Enclosure Technology and Environment Council (BETEC). He is also a guest lecturer at the Boston Architectural Center.


Mr. Anis’ professional focus is the integrity and performance of the building enclosure, from a research, design and troubleshooting perspective, as well as high performance, sustainable building design and indoor air quality. He consults regularly to building owners, architects and manufacturers regarding the design and performance of the building enclosure. He is a board member of the National Institute of Building Sciences, (NIBS), the Boston Society of Architects, The Certified Building Commissioning Professional board of the Association of Energy Engineers, and the Air Barrier Association of America (ABAA). He is chairman of the Building Enclosure Technology and Environment Council (BETEC) The BSA-IAQ committee and the Energy Advisory Committee in MA. He serves as a committee member on ASHRAE 90.1 and Technical Committee 4.4.

Mr. Anis lectures extensively on building enclosure design and indoor air quality. He has written many technical papers and articles, and is the author of Indoor Air Quality: A Design Guide, published by the Boston Society of Architects. He is considered a national resource on air infiltration and moisture control in buildings.


Terry Brennan is a building scientist and educator. He has studied buildings since the 1970’s. Because of his background in physics, biology and building construction, Mr. Brennan combines theory and practice in a unique and integrated way. Mr. Brennan has provided research, training, curriculum development and program support for the EPA, building owners and managers, individual homeowners, and several state health departments. He is currently the chair of the Air Barrier Association of America’s Whole Building Test Committee. He is a member of ASHRAE 62.2 committee on ventilation for low-rise residential buildings. He served as a consultant to the National Academies of Science Committee on Dampness and Health in Buildings.


Dan Crates is the Building Envelope Specialist for Sto Corp. He provides sales, training and technical assistance in the application of fluid applied air barriers, EIFS, stucco and high performance coatings in Oregon, Washington and Alaska.

As a member of the Oregon and Washington Chapters of The Northwest Wall and Ceiling Bureau, CSI chapters in both states and of course SEABEC, Dan brings over 25 years in the construction industry. As a Construction Manager for several years before finishing his degree in Project Management, Dan has been able to apply these valuable on the job skills to the design and consulting environment in his current technical sales role at Sto for the last 5 years.


Mr. Laverne Dalgleish is the Executive Director of the Air Barrier Association of America (ABAA). As such, he works to champion energy conservation in buildings while educating the building owners and designers about the benefits of energy conservation such as durability, comfort, reduced maintenance, reduced HVAC equipment costs and the positive impact on the environment.

Mr. Dalgleish travels North America on a weekly basis to educate building owners and designers on the benefits of effective and working air barrier systems in buildings. This education mission includes working with standards development organizations, training and education groups, government policy departments, and quality assurance program developers for the construction industry. Mr. Dalgleish is the Secretariat of two ISO Committees, ISO TC61 SC10 Cellular Plastics and ISO TC163 SC3 Thermal Insulation Products. He is also Chair of the ULC Thermal Performance in the Building Environment Standards Committee.

Mr. Dalgleish was the key developer of the ABAA Quality Assurance Program for the installation of air barrier systems in buildings. This program is based on ISO9000 and ISO 12576-2 but brings the ISO requirements together with practical applications for the air barrier industry.


Ryan has been involved in the building envelope and building performance areas of construction in both the commercial and residential sectors for over 20 years.

Ryan is a trainer, facilitator and performed a number of management roles for over 2 decades. He is also actively involved in research, training development and delivery, certification management and helping industries increase their professionalism.  Ryan acts in the position of Chief Operating Officer for the Air Barrier Association of America.

Ryan obtained credentials in Adult Education, Leadership and Organizational Excellence from the University of Manitoba and has been mentored and trained by some of the best building scientist’s in the world.  Ryan is a certified Net Zero building instructor, teaches master builder courses to builders across the country and is a frequent speaker at various technical presentations dealing with the building enclosure to various building official associations, city departments, building enclosure councils and chapters of the American Institute of Architects, Construction Specifications Institute and a number of local home builder associations.

Ryan frequently publishes papers for design and construction magazines such as Journal of Building Enclosure and Design, Construct Canada, Interface, Coating Pro Magazine, Spray Foam Professional to name a few.


Jeff Diqui holds a Bachelor of Science Degree in Architectural Engineering with a major in Structural Engineering. He has more than 20 years of experience most of which includes forensic investigations related to moisture intrusion and structural related problems, structural design, building condition assessments, development of repair / rehabilitation designs, and construction observations.

Project work was primarily related to the building envelope including various facades, roofing, and/or waterproofing systems. Jeff’s focus is on being a consultative resource to architects, engineers, specifiers, building envelope consultants, contractors, and code officials related to building science principles. Jeff is a frequent lecturer on topics nationally regarding the importance of maintaining continuity of air, water, vapor, and thermal controls within the building enclosure.

Jeff is actively involved with the building science and architectural / engineering professions. He is a member of the Building Enclosure Council (BEC), Construction Specifications Institute (CSI), The Institute of Roofing, Waterproofing, and Building Envelope Professionals (RCI), Air Barrier Association of America (ABAA) and the United States Green Building Council (USGBC). Jeff is Program Director for the Building Enclosure Council – Chicago Chapter and on the Air Barrier Association of America (ABAA) Terminations and Flashings Committee.


Andrew Dunlap’s primary work experience is in the analysis and development of exterior building enclosures, including historic buildings. Exterior enclosure expertise is comprised of roofing, skylights, windows, curtain walls, rainscreen/cavity walls and waterproofing, and includes development of remediation options and construction documents for corrective work. Andrew’s work focuses on providing energy efficient designs as he regularly participates in validating designs for energy code compliance or to exceed code requirements. Project responsibilities include the collection of detailed building information, investigation and analysis of existing conditions, computerized thermal analysis of building systems (WUFI 5.2, THERM 7, WINDOW 7, and other software packages), formulation of remediation plans, preparation of construction documents for remediation, and construction contract administration including field observation and systems testing. This work often includes performing diagnostic field water tests as part of the forensic investigations or used to validate installed conditions.


Pam Jergenson has been in the construction industry for nearly 30 years, she came to Inspec in 1991. As a senior project manager in the exterior wall department, she works on a variety of wall systems and their transitions in the building envelope: air barriers, masonry, stucco, and EIFS. She is a member of Air Barrier Association of America (ABAA), ASTM, The Masonry Society (TMS), Building Envelope Committee of AIA/MN, and Construction Specifications Institute – Minneapolis/St. Paul Chapter. Pam completed the Air Barrier Association of America’s certification training for field auditing air barrier installation in August 2012 and has been active in the Terminations and Flashings Committee. She has been a TMS member for more than 15 years, focused on the Existing Masonry Committee as the current Task Chair of the Façade Inspection Guidelines. Pam has been a Certified Construction Specifier (CCS) and Certified Construction Contract Administrator (CCCA) for over 10 years. Her responsibilities at Inspec are managing and conducting building envelope surveys and forensic investigations, third party design review and construction observation, restoration and rehabilitation design, and leak testing. An increasing portion of her work is third party design review and construction observation of air barriers. She is trained and performs hygrothermal modeling of the building envelope. Pam’s duties include extensive report and specification writing, design document preparation, construction observation, and construction administrative services for building envelope projects involving multiple systems. She has written the masonry standards for Minnesota State Colleges and Universities and several articles for national publications, CSI-MSP chapter newsletter, and Inspec’s newsletter. Ms. Jergenson also trains personnel and speaks to groups on a variety of topics: exterior wall materials, building envelopes, specifications, construction observation, and related building codes.


Mr. Mills is the president of TAM Consultants, a firm specializing in providing Building Enclosure, Air Barrier Consulting, Forensic Engineering, Property Inspections, Structural Engineering and Design and Project Management Services for the built environment. Mr. Mills brings 20+ years of experience as an engineer in the building industry. He is a licensed Professional Engineer, a LEED AP, and a Licensed Field Auditor for the Air Barrier Association of America (ABAA). Mr. Mills’ experiences cover a wide range of public and private projects of all sizes. Project types include commercial, Federal, municipal, educational, institutional, single and multi-family residential, historical, industrial and manufacturing facilities, laboratory, parking, green buildings and retirement facilities.


Steve Mort holds Bachelor’s Degrees in Physics and Mathematics. He is currently an active member of ABAA Voice Committee, ABAA Terminations & Flashings Committee, Cleveland B.E.C., R.C.I. and various ASTM E06 sub-committees. Steve is the technical product expert on Tremco’s Air Barrier and below grade waterproofing systems giving him extensive knowledge to the entire building envelope. He is an International Concrete Repair Institute Grade 1 Moisture Slab Testing Technician as well as an Infrared Training Center Level 1 Thermographer. Mr. Mort has assisted in building envelope design, material compatibility, sequence of installation, as well as investigative analysis.


Todd Parrott has been involved in the construction and building materials industry for more than 20 years.  Todd or Mr. Parrott has been an architectural consultant and conducted years of education to the architectural community.  He has spent the last two decades in the fenestration industry in roles such as window contracting owner, territory manager, architectural representative and sales in both the commercial and residential markets.  Todd brings with him a depth of technical aptitude and knowledge in construction materials, 3rd party testing of building enclosures and AAMA installation methods. Todd is currently the sales and marketing manager for the Air Barrier Association of America or BPC.  Todd spends considerable time consulting and educating the architectural community nationally on ABAA’s Quality Assurance Program specification (QAP). He also conducts many air barrier symposiums and lunch and learn education events annually for ABAA providing valuable air barrier education to design building teams across the US.


Robert Popp, CSI, CCPR is the Vice President of Division 7 Solutions, Inc. a multi-state, multi-office Architectural Rep firm. He is a graduate of Texas A & M School of Architecture with his expertise being in Environmental Design. He is a published author and speaker in the fields of insulation and waterproofing. He currently is a member of the Air Barrier Association’s The Voice Committee and is chairman of the Certification Management Committee. He also serves on the board for both the Dallas and Fort Worth chapters of the Construction Specifications Institute.


Lance Robson is a principal at Building Envelope Technologies Inc., a consulting firm for the building enclosure industry. Mr. Robson brings over 20 years of experience in building enclosure design, restoration and investigation to the Air Barrier Association of America. His areas of expertise include roofing, wall cladding, curtain wall, fenestration, masonry and concrete repair, waterproofing and air barriers. Mr. Robson established Building Envelope Technologies Inc (BET) in 2000. He later co-founded Robson and So Engineering, Inc., a multi-discipline engineering firm. Prior to establishing BET, Mr. Robson managed the Building Envelope Department of CID Associates in Boston, a 95 person firm providing multi-disciplinary engineering and architectural services to commercial, industrial and institutional clients.

Mr. Robson actively maintains his expertise through participation in professional societies and is currently working to establish air barrier system standards through ASTM. His professional affiliations include AIA, BSA, ASTM and E-6.


Schauffele is an internationally published author and speaker in the fields of energy conservation and sustainable building envelopes including insulation, air barrier technology, roofing & waterproofing, vegetative & cool roofing, all with an eye towards improving building science, performance and quality of life. He is the acknowledged inventor of “The Perfect Wall” which is now the nationwide building code standard for wall construction.

He is President and founder of Division 7 Solutions, Inc, now entering its 31st year of continuous operations and recently sold off his manufacturing firm to an international corporation.

He was the first Technical Director of SPRI (Single Ply Roofing Institute), a Construction Specifications Institute (CSI) Board Director. He has been an elected City Councilperson, a Texas Senate and Gubernatorial appointed official in the State of Texas.

He currently serves as a Past Board Chairman of the ABAA (Air Barrier Association of America), after 3 terms as Chairman. Currently a Technical Advisor to Build San Antonio Green (BSAG) and an award winner 2012 for his Technical Contributions to BSAG and last year named (2016) Individual Green Practitioner by the City of San Antonio for Sustainable Education and Outreach.

Globally, he is the only person to be a Fellow of both CSI and ABAA and he continues to be a requested national speaker on energy conservation and sustainability.


Mr. Stephen Shanks is the Chief Operating Officer of CTI Consultants, Inc. (CTI), a full-service engineering consulting firm with its corporate headquarters in Richmond, Virginia, and branch offices throughout the Mid-Atlantic, Carolinas, Southeast, and Central Gulf Coast with special project experience nationally and internationally. He has been responsible for and in charge of engineering services for over 30 years providing a multi-disciplinary approach to the integration of engineering principles and technology to building design and construction. Air Barrier consulting experience related to Design, Inspection, and Performance Verification Testing including Whole Building Air Tightness Testing in accordance with applicable USACE, LEED, ASHRAE 189.1, and ASTM E779 requirements. Other related experience includes Commissioning of New and Existing Buildings; Building Enclosure Design, Inspection, and Testing to determine conformance with ASTM and AMAA requirements; and providing Expert and Forensic Services.


Mr. Peter Spafford has been involved in the building enclosure and energy efficiency aspects of commercial and residential construction for 25 years.  As a teacher and educator, he has taught thousands of installers on the application of air barrier, insulation, building enclosures, building assessment and analysis, blower doors, cladding systems and building science.  Peter has overseen the delivery of education as a project manager up to 50 training programs delivering 2 day to 6 months of training.  Mr. Spafford has also spent a tremendous amount of time in the field performing 3rd party inspections and quality control on behalf of government, quality assurance providers, utilities and warranty programs. Mr. Spafford currently is the quality assurance director for ABAA and oversees the auditing process, deals with site related issues and provides support to the proper installation of air barrier systems.


Brian Stroik is a recognized industry leader in the construction of energy efficient, sustainable and durable buildings.

Brian works with key industry organizations – including the Air Barrier Association of America, the National Building Enclosure Council, the Building Enclosure Technology and Environmental Council (BETEC), and ASTM E06 – on research and education regarding building enclosures, energy efficiency, retrofitting and upgrading existing building enclosures.

Brian is a frequent speaker on the subjects of: commissioning the building enclosure (BECx), quality in construction, and mock ups / first run studies.  Brian has also chaired numerous speaker sessions at national conferences and hosted roundtable discussions.  He holds the following industry positions and affiliations:

  • Past Chair, National Building Enclosure Council (NBEC)
  • Vice Chair and a Director, Air Barrier Association of America (ABAA): Past Chair Research Committee
  • Advisory Board Member, Building Enclosure Technology and Environmental Council (BETEC a Council of the National Institute of Building Sciences – NIBS), Washington, DC
  • Founder and Chair, Building Enclosure Council of Wisconsin (BEC-WI)
  • Voting member of ASTM E06 – Building Performance
  • Senior Member, American Society of Quality (ASQ)
  • Certified, American Society for Healthcare Engineering (ASHE)

White papers by Mr. Stroik on the subjects of building energy efficiency and building enclosure design, among others, have been published in The Journal of Energy Efficiency & Reliability, The Journal of Building Enclosure Design and SprayFoam Magazine.


For the last five years Nathan Weibel has been the Northwest Technical Service Specialist for the Henry Company’s Building Envelope Systems Division. Mr. Weibel provides product training and technical assistance in the application of Henry air barrier, waterproofing, roofing and high performance coating systems throughout the Western United States. Nathan also works closely with design professionals and is heavily involved with Henry’s Building Science Group which specializes in specification work.

Mr. Weibel is an active member of CSI, RCI and SEABEC. Nathan has over 18 years in the building envelope construction industry. With this well rounded background experience, Nathan has been able to provide valuable insight to contractors, design professionals and building envelope consultants.