Project Profile
Services Provided

Stephen L. Patterson, PE, CPRC, RRC, Director of Engineering Services, is a Licensed Professional Engineer and Certified Professional Roofing Consultant with over 40 years experience. He consults with clients on all types of roofing, waterproofing, and building envelope issues and provides engineering design and evaluation services. His accomplishments include:


  • Licensed Professional Engineer, Texas, 1978 (No. 44030); Oklahoma, 1998 (No. 18913)

  • Certified Professional Roof Consultant, Institute Roofing & Waterproofing Consultants, 1996

  • Registered Roof Consultant, Roof Consultant Institute, 1999

  • Bachelor of Science, Civil Engineering, Texas Tech, 1971

  • Masters Business Administration, University of Dallas, 1977

  • Member of the Executive Committee and former Chairman of the Construction Research Center, University of Texas at Arlington

  • Published: A Low-Slope Commercial Roofing Overview, Texas Architect 1998, Roof Design and Practice (Prentice Hall, 2001), Wind Pressures on Low Sloped Roofs (RCI, 2001 & 2005), Roof Drainage (RCI 2003), Roof Drainage Design (RCI, 2007), and Life Safety Roof Design Issues (RCI 2010), Combination of Wind Load and Rain Load (RCI 2012), Design of Non-Ballasted Low-Slope Roof Assemblies for Wind Resistance (RCI 2014), and Understanding Low-Sloped Standing Seam Metal Roofs (RCI 2015).


  • Founder and Former President of ROOFTECH (Roof Technical Services, Inc.), a leading Roof Consulting Firm in the Southwest

  • Established and teaches a series of Continuing Education Courses on Roofing through the Construction Research Center and the Building Professional Institute, both at the University of Texas at Arlington

  • Consults with leading design firms in solving roofing and waterproofing problems on major U.S. and international projects

  • Director of Engineering and Technical Director for two different roofing manufacturers that provided built-up, single-ply, and roof maintenance products and systems

  • General Manager of a large full-service roofing and sheet metal contracting company that performed all types of roofing and sheet metal installation.

  • Developed, tested, and received approvals for roofing systems with such agencies as Underwriters' Laboratory, Factory Mutual, ASTM, ICBO, SBCC, and Dade County.


  • 2017 to Present: President of Roof Technical Services, Inc./ROOFTECH. Performs roofing and waterproofing design and performs engineering, investigative, and testing services related to all types of roofing and waterproofing issues.

  • 2004 to 2017 President of Roof Technical Services, Inc. and Director of Engineering for ROOFTECH. Performs roofing and waterproofing design and performs engineering, investigative, and testing services related to all types of roofing and waterproofing issues.

  • 1983 to 2003: President of Roof Technical Services, Inc. (ROOFTECH), an engineering firm specializing in roofing and renovation. ROOFTECH was founded by Stephen L. Patterson, P.E. in 1983 and is one of the oldest and largest roof consulting firms in the Southwest with a clientele that includes Texas Christian University, American Airlines, United States Postal Service, United States General Services Administration, University of Texas Health Science Center, Tarrant County, and numerous independent school districts in Texas.

  • 1981 to 1983: Technical Director and Divisional Manager for Monroe, Inc., a "Roof Management Company" involved in the manufacture and installation of a broad line of roofing products, including maintenance materials, built-up roofing, and PVC and modified bitumen single-ply roofing systems.

  • 1973 to 1981: Director of Engineering for Southwestern Petroleum Corporation, an international manufacturer of roofing materials including built-up roofing and single-ply roofing systems, as well as a line of roof maintenance systems. Also, worked as General Manager of ROOFTECH in a dual role from 1974 to 1979 (see below).

  • 1974 to 1979: General Manager of ROOFTECH, Inc. (a solely owned subsidiary of Southwestern Petroleum), a full-service roofing and sheet metal contracting firm installing all types of commercial, industrial, and residential roofing and sheet metal.

  • 1971 to 1973: Project Manager and for Crowe Gulde Inc. a manufacturer of precast pre-stressed concrete products and building systems. Performed a variety of engineering duties including structural design, estimation, and project management.

Mr. Patterson's experience and training are virtually unsurpassed in the roofing field. He has been extensively involved in the research and development of roof coatings, single-ply roofing, and built-up roofing, having traveled much of the world investigating and solving roofing problems. He has evaluated and designed virtually all types of roofing systems, including built-up, metal, tile, slate, composition, single-ply, and sprayed-in-place polyurethane foam. Mr. Patterson has written extensively and has taught numerous continuing education courses on a variety of roofing issues.