Phil Dregger presents at the 2025 RICOWI Spring Conference

Phil Dregger of Salas O’Brien is presenting, Cause of Massive Roof Leaks Disputed – Insights from a subrogation case at the 2025 RICOWI Spring Conference on Wednesday, March 5th, 2025. Get registration information.

This workshop is designed to improve the skills and knowledge of design, rehabilitation, and forensics professionals (consultants, architects, and engineers), developers, contractors, and building system manufacturers.

Phil Dregger, PE, RRC, is a seasoned consultant and expert witness specializing in roofing, waterproofing, and building enclosure systems. His expertise extends to California’s Title 24 Part 6 Energy Code, with a particular focus on roof drainage and wind or hurricane damage. Phil’s experience in patent litigation, cold storage, and condensation issues is marked by his skill in hygrothermal analysis, including wood decay, biological growth, and corrosion, utilizing tools like WUFI Pro, ASHRAE Standard 160, and ASTM E3054. A recognized figure in the industry, Phil actively contributes through presentations to industry and legal groups, authoring numerous technical articles. His contributions have been acknowledged with prestigious awards such as the ASTM D08 William C Cullen Award and the IIBEC/RCI Lifetime Achievement Award.

Yes, the leaks were massive. The dispute was if the roof contractor’s ‘temporary protections’ were to blame. What about the beyond-code rainfall and the ponded water suspected to have overtopped incomplete flashings?

Phil Dregger, PE, RRCVice President, Salas O’Brien

About RICOWI

The Roofing Industry Committee on Weather Issues, Inc. (RICOWI) was established in 1990 as a non-profit organization to identify and address important technical issues related to the cause of wind damage.

About Salas O’Brien

Salas O’Brien is an employee-owned engineering and technical services firm focused on advancing the human experience through the built environment. Our team is engineered for impact, helping clients achieve critical goals, advancing our team members through growth and opportunity, and operating at the center of important global issues, including sustainability and decarbonization. We are a top firm as ranked by Engineering News-Record and Consulting-Specifying Engineer, and we have appeared for over a decade on the Inc. 5000 list of North America’s fastest-growing private companies.

For more details or to set up an interview, please reach out to [email protected].

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