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This presentation initially took place at IIBEC's 2022 International Convention and Trade Show in Orlando, Florida. Although there is currently no ASTM method specifically for testing built-up and modified bitumen (bituminous) roof systems for hail-caused damage, laboratories routinely test bituminous roof systems for hail-caused damage. This presentation discusses the ASTM test methods that are commonly referenced in these laboratory testing reports. This presentation also includes findings from research the author’s company has performed using ASTM D3746, Standard Test Method for Impact Resistance of Bituminous Roofing Systems, to illustrate what hail-caused damage of bituminous roofs looks like and to compare our ASTM D3746 test results to actual hail-caused damage to bituminous roofs. The intent is to provide exemplar photographic examples for visual comparative purposes. Stephen L. Patterson, RRC, PE ROOFTECH | Fort Worth, TX Stephen L. Patterson has been in the roofing industry for almost 50 years. He founded Roof Technical Services Inc. (ROOFTECH) in 1983 and has been an active consulting engineer and roof consultant ever since. ROOFTECH has provided laboratory testing, including testing for hail damage, since the late 1980s. Patterson has been technical director/director of engineering for two roofing manufacturers and managed a roof contracting company for four years. Read More

The design of high-performance building skins in a 21st century city demands more forethought than building codes or zoning ordinances can anticipate. This session will explore, through forensic case studies, why newly built high-performance skins fail through the lens of an analytical tool called the “Orders of Failure.” Jeffrey Ng is an architect with over 35 years of experience integrating art and science in adaptive high-performance building skin designs. He has consulted on innovative award-winning national and international architectural projects. He has presented at numerous conferences, including the 2017 AIA National Convention, 2013 Façade Design and Delivery Conference, and the 2010 BESS Symposium at Cal Poly in Pomona. Prior to joining Intertek, Ng was VP and lead building skin consultant at Thornton Tomasetti. He has been associated with leading architectural firms Ehrenkrantz & Eckstut, Davis Brody, Cossutta Associates, I. M. Pei & Partners, and S.O.M. Jennifer Keegan has 18 years of experience as a building enclosure consultant specializing in assessment, design, and remediation of building enclosures. She has investigated failures and provided construction administration, condition surveys, and design per reviews of residential and commercial façades; has served as an expert witness; and offered litigation services. Utilizing her expertise in the built world, Keegan brings depth and focus to building enclosure commissioning and a proactive team approach to meet project performance requirements. Read More

Presenters: Alex Healy, RH Precision Unmanned Inc., Ottawa, ON Matthew Ryan, RH Precision Unmanned Inc., Ottawa, ON This course will cover the use of unmanned aerial vehicles (UAVs) for building envelope applications and will focus on rotary vertical take-off and landing (VTOL) aircrafts. By gaining an appreciation of the benefits of deploying UAVs, stakeholders in the building envelope sector will have a better understanding of how this technology can be used to save time and money, and mitigate risk when executing visual inspections. The discussion covers common regulatory hurdles faced when implementing the technology for building envelope inspections and will be supported with case study examples. The current state of regulations governing the use of UAVs for commercial operations will be addressed, outlining the process for receiving the necessary Transport Canada approvals. There is a brief examination of how regulations are expected to change by comparing the proposed Canadian framework to that which has recently been instituted in the United States. Next, the use of UAV data sets for reporting on the status of assets and structures is conveyed by examining the different levels of processing. Finally, the presentation shifts to cover advancements in UAV hardware and software developments and how this will impact stakeholders in building envelope technologies and practices. Read More

Reroofing of existing buildings—both replacement and re-covering—is roughly 75 percent of the roofing industry. To that end, understanding how to determine whether a building requires a roof replacement or re-cover is key to a successful reroofing project. Reroofing-specific code requirements, investigation methods, and analysis of decks and insulation will be discussed, as well as the necessary aspects of wind resistance and energy efficiency upgrades (insulation, air barriers). In addition, the presentation will provide information to assist with the design and installation of flashing details given existing conditions. Jennifer Keegan, AAIA GAF | Parsippany, NJ Jennifer Keegan is the director of building and roofing science for her firm, focusing on overall roof system design and performance. Keegan has over 20 years of experience as a building enclosure consultant specializing in assessment, design, and remediation of building enclosure systems. She provides technical leadership within the industry as the chair of the ASTM D08.22 Roofing and Waterproofing Subcommittee, and the education chair for IIBEC; and as an advocate for women within the industry as executive board member for National Women in Roofing and a board member of Women in Construction. James Kirby, AIA GAF | Parsippany, NJ James R. Kirby is a building and roofing science architect with his firm. He has a master of architecture degree with a structures option. With over 25 years of experience in the roofing industry, covering low-slope, steep-slope, metal, SPF, vegetative, and rooftop photovoltaics, he understands the effects of heat, air, and moisture on a roof system. Kirby presents building and roofing science information to architects, consultants, and building owners, and writes articles and blogs for building owners and facility managers and the roofing industry. He is a member of AIA, ASTM, ICC, MRCA, NRCA, IIBEC, and USGBC. Read More

Burying a pre-applied waterproofing system between an earth retention system and newly installed concrete—never to be seen again—creates a difficult scenario whereby designers, manufacturers, and contractors are left to wonder just how well their system will perform. SmithGroup (an architectural engineering firm) partnered with a design-build contractor to develop a new university laboratory building. The building included two stories of below-grade construction and was placed at the corner of the project site close to the intersection of two streets. Based on previous success, the design-build contractor proposed the use of a specific blindside system. For the proposed system to be approved for the project, both parties agreed to perform an evaluation. A significant part of the evaluation process included the assembly and forensic deconstruction of a full-size structural shotcrete mock-up. There are three areas of concern typically posed to all pre-applied waterproofing membranes: Does the system bond to the concrete? Will the system survive the installation of the structural shotcrete? Can the system resist lateral water migration? From the lessons learned during the assembly and deconstruction of the mock-up, we will review the findings and use scientific methods with applied physics to evaluate the original assumptions and validate the findings. As a member of SmithGroup’s Building Technology Studio, Jerry Carter’s primary work experience focuses on the analysis and development of exterior building enclosure systems. He specializes in the design and restoration of plazas and garden roofs, conventional roofing, and below grade waterproofing. He also plays a key role in developing and maintaining SmithGroup’s master specifications related to the exterior enclosure. Carter received his B.S. in architecture and his master of architecture from Lawrence Technological University. He has been with SmithGroup for over 11 years. He is a current vice chair for the local chapter of the Building Enclosure Council. David Leslie’s experience includes product development, contracting, and consulting. His 30 years of experience have provided him with a unique insight into numerous aspects of the building enclosure. He is a published author, public speaker, expert witness, and holder of multiple patent applications. Leslie is an active member of IIBEC, a Registered Waterproofing Consultant, an ABAA Licensed Field Auditor, and a member of SWRI. It is his core belief that there is no good reason for a building to leak, and he has committed much of his career in keeping people dry. Read More

This was initially presented at IIBEC's 2021 Virtual Spring Symposium The mitigation of design and operational risk associated with the accumulation and release of ice and snow from buildings is a complex and challenging endeavor. Design issues range from a sliding snow mass on a sloped roof causing damage to obstructions, objects, and people below, to ice sheets or snow masses that release from high-performance facades and facade appurtenances. Adding to this issue is a reported increase in the magnitude, frequency, and severity of problematic ice and snow release from high-performance buildings, which is leading to extended periods of downtime and lost productivity for building occupants, neighboring buildings, and adjacent public thoroughfares. All of which pose a hazard to people and property, as well as a significant risk for building designers and owners. To effectively mitigate the issue at the design stage, an evaluation of the magnitude, frequency, and severity of problematic accumulations need to be weighed against the acceptable level of reliance on building operations to manage the risk of an incident occurring. It is this realization of the potential the extent of future required actions that promote a determination of project-specific design criteria, guiding the development of practical and effective mitigation strategies, reducing risk overall. Read More

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