Proceeedings of the RCI 21st International Convention Stanford – 149 Condensation in Metal Roofing: Design and Installation Resolution Roof Consultants Institute Robert Stanford, RRO Robert Stanford & Associates, Inc. Missouri City, Texas ABSTRACT The objective of this paper is to present industry standard information and knowledge related to metal roofing use and installation that will prove helpful to the attendees. It will illustrate the source(s) and causation of air and moisture infiltration into metal roofing systems. Topics presented include common design defects in metal roofing, installation details, improper installation procedures and methods, and examples of properly designed and installed metal roofing systems. SPEAKER ROBERT STANFORD has 35 years experience in the metal roofing industry and ten years experience as a metal roofing consultant and expert witness. He has published articles in Interface on metal roofing and metal roofing issues. Stanford has clients in 25 states and five foreign countries and has consulted with architects, building owners, contractors, manufacturers, insurance companies, attorneys, school districts, and the United States Army Corps of Engineers. Stanford – 150 Proceeedings of the RCI 21st International Convention ABSTRACT: The objective of this paper is to present industry standard information and knowledge related to metal roofing use and installation that will prove helpful to the attendees. It will illustrate the source(s) and causation of air and moisture infiltration into metal roofing systems. Topics presented include common design defects in metal roofing, installation details, improper installation procedures and methods, and examples of properly designed and installed metal roofing systems. OVERVIEW: I. Identify learning objectives. II. Definition and discussion of hydrokinetic and hydrostatic metal roofing systems. Review of SMACNA details and how they relate to modern metal roofing assemblies. III. Present project photos depicting freeze/thaw cycles on metal roofing and water infiltration (and condensation) through hydrokinetic metal roofing systems. IV. Present project photos showing common design defects in metal roofing. V. Present project photos showing improper installations and waterproofing failures with comments on resolution and proper installation methods and procedures. VI. Present project photos showing correct installation and waterproofing procedures for metal roofing systems. VII. Summary and review of learning objectives covered in presentation. VIII. Question and answer period. IX. Conclusion. NARRATIVE COMMENTS OF POWER POINT SLIDES IN PRESENTATION: SLIDE # 1: Title block: Metal Roofing Systems, presented by Robert Stanford & Associates, Inc. SLIDE # 2: Learning Objectives: • Metal roofing profiles • Two classifications of metal roof systems and their recommended uses: * Weathertight structural standing seam (hydrostatic) * Water shedding standing seam (hydrokinetic) • Design defects in metal roofing • Improper installation and waterproofing failures • Examples of proper and correct installations and waterproofing • Warranties and manufacturer liability SLIDE # 3 – 6: Definitions: • Hydrokinetic and hydrostatic • Drawing of hydrokinetic detail • SMACNA details comments SLIDE # 7 – 11: Identify and discuss four types of metal roofing manufacturers: • First tier manufacturers • National component manufacturers • Regional component manufacturers • Job-site, portable roll former manufacturers SLIDE 12 – 13: Warranties: Paint finish warranty Weathertightness warranty SLIDE 14 – 23: (Freeze/Thaw cycles) and results of immersion of hydrokinetic standing seam systems. • Photos of Glenwood Springs, Colorado project • Photos of Houston, Texas project Proceeedings of the RCI 21st International Convention Stanford – 151 Condensation in Metal Roofing: Design and Installation Resolution SLIDE 24 – 35: Depict and illustrate common design defects in metal roofing. • Photos of middle school project in Mount Vernon, Ohio SLIDE 36 – 75: Examples of proper and improper installations and waterproofing failures • Project photos from high school in Marble Falls, Texas • Project photos from project in DeRidder, Louisiana • Project photos from medical building in Lake City, Florida • Project photos from schools in the Houston, Texas area. SLIDE 76: Summary: • Metal roof design and installation requires specific knowledge of roof types, profiles, and systems (hydrostatic vs. hydrokinetic). • Design defects are common in metal roofing (wrong panel for the wrong application, etc.). Not all roof geometries are suitable for metal roofing. Design professionals may choose (or force) form over function. • Improper installation is the primary source and causation of metal roofing failures. • Warranties are prepared to protect the maker. • Water infiltration and condensation damage and destroy metal roofing and often result from following improper details and installation instructions provided or approved by the manufacturer. • Metal roofing is the best roof system available, provided it is the right product in the right application and is properly installed. • Proper wind design for roof systems is the most overlooked and least understood design issue in construction. SLIDE 77: Title block QUESTION AND ANSWER PERIOD Stanford – 152 Proceeedings of the RCI 21st International Convention
