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Allana Buick & Bers (ABBAE) is a multi-discipline architectural engineering firm specializing in making buildings perform better. We are experts in exterior façade, roofing, waterproofing, building forensics, structural engineering, mechanical engineering, renewable/alternative energy, and energy efficiency consulting. For over 31 years, we have assisted clients in reducing their exposure to leaks and premature building failures. Our philosophy is that buildings should last longer and be sustainable. Our experience is based on real world forensic analysis on hundreds of failed building envelope systems. We  can reduce risk for contractors throughout construction by offering construction and design document review, mockup construction and testing, quality assurance, monitoring, and testing services.


In the design phase, ABBAE can review construction and design documents, to flag typically problematic materials and recommend alternate materials to mitigate the contractor’s risk. Additionally, ABBAE’s design document review can disclose risky design decisions to the architect or owners, thereby reducing the contractor’s risk. Mock-up construction and testing by ABBAE, shows how materials interact and how systems transition into each other, giving an opportunity to make vital design and construction changes in the field before costly construction. During construction, ABBAE’s quality assurance and monitoring services reduce risk by keeping detailed

reporting of all open items and completed. These reports are daily shared with the general contractor.

Karim Allana, PE, RWC, RRC

Karim P. Allana is the CEO, and Founding Principal of ABBAE. Mr. Allana has a B.S. in Civil Engineering and is a licensed professional engineer in four states. He has been in the A/E and construction fields for 31+ years, specializing in forensic analysis and sustainable construction of roofing, waterproofing, exterior facade and solar systems. Mr. Allana founded ABBAE 31 years ago which employs over 130 employees in various regions of California, Washington, Oregon, North Carolina, and Hawaii. Mr. Allana’s experience stems from a broad background which includes working for Turner Construction Company and owning and operating a roofing and waterproofing company. Mr. Allana is also a world renowned construction defect expert and uses his forensic knowledge to reduce risk in new construction by incorporating lessons learned from failures.

Eugene Buick, P.E.

Eugene Buick is the Chief Operating Officer, and Senior Principal at ABBAE. With experience in property condition assessments, leak testing and analysis, peer review and design, and construction phase services for a variety of clients and building types. His specialty expertise includes all components of the building envelope, waterproofing, below-grade waterproofing systems, roofing, windows, and exterior wall. His responsibilities include directing and managing the activities of more than 130 staff members including architects, engineers, technical design staff, building technologists, construction specialists, and waterproofing and roofing consultants.



Gerson Bers, LEED AP

Gerson Bers is a Vice President, and Senior Principal at ABBAE. He is a graduate of the University of Maryland, College Park where he received a B.S. in Physical Sciences. Mr. Bers is a LEED Accredited Professional and is a DOE certified WUFI ORNL instructor in Hydrothermal Analyses. He has more than 30 years of building technology consulting experience with special emphasis on design of new and remedial building enclosure system design as well as investigating and resolving moisture infiltration issues for occupied facilities. Mr. Bers is responsible for planning and executing forensic investigations and assists in preparing and reviewing findings reports and remedial repair construction documents and cost estimates. Mr. Bers has provided both expert and percipient testimony for construction defect litigation from both plaintiff and defendant perspectives. He is a frequent speaker and presenter at professional forums.


Grant Henry

Division Manager, and National Director of Testing Services for the Portland office. He conducts design services, such as peer review and construction documents, construction management services, mechanical assessments, and building envelope testing. Mr. Henry adds to the company’s testing services portfolio, with his knowledge of electronic leak detection (ELD) testing. He is a trained and certified residential and commercial property inspector. Typical systems inspected include, electrical, plumbing, foundation, waterproofing building envelope, and structural components.



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Mitigating Risk In Construction


More than 85% of construction related lawsuits are due to water intrusion and leaks. Learn how to mitigate risk in construction and avoid leaks. Mitigating leaks and defective construction not only requires good detailing and design, it requires proper interpretation of manufacturer’s requirements and coordination between adjoining trades.  Building envelope consultants can aid contractors during the design phase by reviewing design documents and providing peer review for conformance with manufacturer, code and industry requirements. During pre-construction, envelope experts can conduct meetings with key enclosure sub-contractors. This gives them an opportunity to ask/answer integration questions and understand what is needed for quality control measures before construction begins.


Learning Objectives:

  • Understand how conscientious design can affect water intrusion, overall building performance, and construction risk.
  • Learn how pre-construction meetings with key enclosure sub-contractors can set quality control measures at the onset of construction.
  • Demonstrate through examples how mock-up construction allows an opportunity to make design and construction changes in the field.
  • Learn how water testing of mockups and assemblies can help mitigate risk, how many tests are recommended and which types of tests to conduct.

Construction Testing to Mitigate Leaks


Learn how to mitigate leaks with construction testing and mock-up testing. For building envelope systems to function trouble free, many elements that need to be confirmed and tested. Necessary testing includes  adhesion testing, testing for compatibility between materials; thickness testing, air barrier testing; water testing, seismic testing; moisture permeation testing, and many others.   Furthermore, testing during construction can mitigate risk by catching installation failures, design defects, or manufacturing failures that could cause leaks, prior to building occupancy. Additionally, quality assurance and monitoring services reduce risk by identifying deviations from the standard details and procedures.


Learning Objectives:

  • Learn the test standards for air barrier testing, water testing, and horizontal waterproofing and how these tests can identify failures, design defects, and manufacturing failures.
  • Learn how conductive substrates can be built-in during construction to mitigate costly repairs and precisely pinpoint roof leakage before there is underlying damage.
  • Learn about putting a check list together for building envelope testing
  • Learn about at which stage the testing needs to be performed, the proper substrate preparation for the test and how to communicate with the testing company.


Horizontal Above Grade Waterproofing


Learn about various waterproofing configurations, considerations, protections, installation and life expectancies of systems. Learn about proper requirements for substrate preparation, adjoining materials, compatibilities and substitutions for similar systems. Learn how electronic leak detection (ELD) testing works, quality assurance inspections, and manufacturer’s warranty requirements.


Learning Objectives:

  • Learn about the different types of horizontal waterproofing and the pros and cons of each.
  • Learn how to protect your plaza/podium/deck from construction damage, standing water, rot, and thermal damage.
  • Understand the different structural substrates and pros and cons of each.
  • Learn how to utilize warranties - a warranty never prevented a building from leaking.

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