Greetings! We will be conducting our June 2023 Meeting and the presentation will be "Design and Testing of Perimeter Edge Metal for Low-Slope Commercial Roofs" Presented by Bob LeClare with ATAS International, Inc. Mark your calendars for June 22nd at 12:00pm EDT. We look forward to having you attend this free webinar, register today as space is limited! 

CLICK HERE to register!
May 2023 Webinar Event (

Investigation of low-slope roof systems that failed in high wind events have consistently revealed poor performance of the perimeter edge metal to be the leading cause of failure.

This presentation will review the findings of some of those roof investigations. It discuss the negative pressures created by high winds that, when not properly resisted, will result in failure of the perimeter edge metal, and possibly the complete roof systems. The presentation will demonstrate how to calculate the anticipated negative pressures for a specific building under consideration, and how perimeter edge metal systems are tested to assure they are capable of resisting the calculated design pressures. The presentation will also identify some common causes of perimeter edge metal failures and explain how they can be prevented.

Learning Objectives:

  1. Identify on drawings or in the field the three roof conditions that utilize perimeter edge metal, and name the ANSI/SPRI standards written for those conditions.
  2. Use ANSI/SPRI ES-1 to calculate the vertical and horizontal negative pressures on perimeter edge due to wind.
  3. Specify in Division 7, Thermal and Moisture Protection, the three perimeter edge metal test methods required by code (IBC).
  4. Recognize, when designing or specifying perimeter edge metal, three common perimeter edge metal design and installation errors, and explain how they can be avoided.

Credits: 1.0 LU | HSW 

Speaker's Bio:
Bob LeClare is Director of Perimeter Edge Business for ATAS International. He holds a bachelor’s degree from Purdue University and has over 30 years of experience in architectural metals and the roofing industry. His areas of responsibility have included engineering, fabrication, installation, and sales of architectural metals and roofing products. Prior to joining ATAS, Bob has been VP of Operations for OMG Edge Systems, and VP of Sales for both WP Hickman and Metal-Era Inc, all leading manufacturers of perimeter edge roof systems.

Bob is a Past-President and currently sits on the board of SPRI (Single Ply Roofing Industry) and chaired SPRI’s ES-1 task force. He has been very active in the development of both standards and codes related to edge metal for low-slope roofing. Bob is also a member of International Society for Construction Sciences (iSCS), Construction Specifications Institute (CSI), the International Institute of Building Envelope Consultants (IIBEC, formerly RCI), the Roofing Industry Committee on Weather Issues (RICOWI), and National Women in Roofing (NWiR). He is an industry expert on perimeter roof edge design, testing and performance, and has given presentations on those topics to numerous organizations including Western States, CSI, RCI, RICOWI, National Roofing Contractors Association (NRCA) and the International Roofing Expo (IRE).