Agenda:

11:00 AM to 1:30 PM

11:00 AM – 11:30 AM – Check In and Network

11:30 AM – 12:00 PM – Lunch and Announcements

12:00 PM – 1:15 PM – Presentation

1:15 PM – 1:30 PM – Questions

1:30PM – Adjourn

In-Person ONLY Meeting

COST

In-Person Members – $20

In-Person Non-Members – $30

Join us Tuesday, September 9th for our next BEC Presentation!

Save the date!

Join us September 9th, 2025 for a meeting hosted by Kraus Anderson.

501 S 8th St, Minneapolis, MN 55404

Watershed Moments in Roof Drainage History: A study of interactions between precipitation management for the roof and enclosure lifespan

Course Description:

The ability of steep- and shallow-sloped roofs to properly manage rainwater and snow accumulation directly impacts their long-term durability and lifespan, in addition to that of other assemblies within the building enclosure.  The entire roof drainage system, including the components that convey the precipitation once it has left the roof, all need to work in accord to ensure that premature roof failure or collapse are avoided, and that the building enclosure can satisfactorily fulfill its intended use.

Drawing on case studies including condition assessments and failure investigations, this presentation will review both lessons learned and current industry practices for the design and construction of roof drainage and will offer suggestions of best practices for consideration moving forward.

Learning Objectives:

• Participants will develop a better understanding of the relationship between steep slope roof drainage zones and the likelihood of roofing failures
• Participants will gain perspective around current practices of design professional engagement and resulting roof drainage strategies
• Participants will learn about case studies where lack of end-to-end precipitation management resulted in enclosure component failures not associated with the roof
• Participants will learn about the interaction between degree of roof slope and progressive deflection leading to ponding instability

Presented by Jon Porter

Jon Porter is the Director of Building Science at Kraus Anderson Construction. In his role at KA, Jon focuses on building performance, with particular focus on the exterior enclosure and interior finishes.  He serves as a technical resource to project teams in relation to means and methods, constructability, building materials technology, workflow and sequencing, proper installation techniques, and testing and acceptance protocols.  A licensed Professional Engineer in the State of Minnesota, Jon has 30 years of design and construction experience, including roles in forensic investigation of design and construction failures and as an owner’s representative.

Bachelor of Civil Engineering, Cleveland State University

Minnesota Licensed Professional Engineer

American Institute of Architects (AIA), Associate Member

Building Enclosure Quality Assurance, Quality Control and Forensics