National Roofing Contractors Association W. Higgins Road, Suite 600, Rosemont, IL

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1 The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012

2 National Roofing Contractors Association W. Higgins Road, Suite 600 Rosemont, IL (847) Fax: (847) Website: Published by the National Roofing Contractors Association W. Higgins Road, Suite 600, Rosemont, IL by the National Roofing Contractors Association All rights reserved Published 2012 Printed in the United States of America

3 Important Legal Notice for Users of The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Purpose of the Manual The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 (Manual) is published by the National Roofing Contractors Association (NRCA) for educational and informational purposes only. NRCA is not rendering specific professional advice. Users must rely solely on their own judgment and/or consult experienced, technically competent roofing professionals to determine which procedures, whether included in the Manual or not, are appropriate for their purposes. NRCA does not approve or endorse any specific products, methods, practices or sources of information. The Manual should not be referenced in any way that implies such approval or endorsement. Disclaimers The information and data contained in the Manual have been obtained from sources believed to be reliable. However, the various codes, regulations, standards and practices referenced in the Manual are subject to change, and the Manual is current only as of its original publication date. Users should consult appropriate sources for the most up-to-date versions of all codes, regulations and standards. Further, it should not be assumed that all acceptable or applicable sources of information, procedures and techniques are contained in the Manual or that additional measures may not be required under certain circumstances or conditions. NRCA makes no guarantee, representation or warranty, express or implied, at law or in equity, and NRCA expressly disclaims any and all such guarantees, representations or warranties whatsoever as to the validity, accuracy or sufficiency of the information set forth in the Manual and assumes no responsibility or liability in connection therewith. While NRCA recommends the use of the Manual by private industry and others, it is intended to be voluntary and nonbinding, and NRCA assumes no liability or responsibility in connection with the use or misuse of the Manual or information included therein, or in connection with any modifications to or adaptations of the Manual by a user, purchaser or other party, and expressly disclaims any such liability or responsibility. The Manual is not intended to be relied on as a source of information with respect to safety issues associated with the various roof systems, procedures, techniques and products discussed therein. Accordingly, the Manual does not address applicable, required or recommended safety procedures or other safety information relevant to roof construction or the useful life of a roof system. Users must take all necessary measures to establish sound safety practices and are urged to consult appropriate reference materials such as product manufacturers material safety data sheets, federal OSHA requirements and applicable state counterparts local ordinances and other relevant sources of information. By using the information contained in the Manual, the user expressly assumes all risk of loss, harm or injury resulting from the use or misuse of such information. Additionally, the information presented in the manual is complex, may not be appropriate in all instances, and requires verification and use by experienced, technically competent roofing professionals. Modification to all or parts of the information included in the Manual by the user may affect the results, accuracy, reliability or other aspects of the information. By using this Manual, the user acknowledges and accepts the foregoing limitation of liability and disclaimers and agrees that NRCA is not responsible for injuries, claims, losses or damages to the user or third parties arising directly or indirectly out of the user s use of the Manual and/or the information contained therein. The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Legal Notice 3

4 Amendments NRCA may, from time to time, amend and/or update the Manual. Such updates and amendments may create significant differences among successive editions of the Manual. The Manual is current only as of the original publication date indicated thereon. Copyright NRCA owns all copyrights in the Manual. The contents of the Manual may not, in whole or in part, be reproduced, copied or disseminated, entered into or stored in a computer database or retrieval system, or otherwise used without the prior written consent of NRCA except that users may reproduce a limited number of pages, figures or construction details solely for purposes of responding to proposals, preparing shop drawings and similar noncommercial, limited uses. 4 The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Legal Notice

5 FOREWORD The National Roofing Contractors Association (NRCA) is pleased to present The NRCA Roofing Manual: Metal Panel and SPF Roof Systems This manual is intended to provide best industry practices and technical information concerning the design, materials and installation of roof systems. This manual is best used in conjunction with the other currently applicable editions of The NRCA Roofing Manual, including The NRCA Roofing Manual: Steep-slope Roof Systems, The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing, and The NRCA Roofing Manual: Membrane Roof Systems. The NRCA Roofing Manual presents time-tested, best-practice guidelines for roofing buildings and other enclosed structures; the information has been collected by NRCA from knowledgeable, practicing roofing contractors located throughout the U.S. The information in the manual reflects the consensus of the roofing contractors consulted; the manual does not purport to include all practices, designs or applications. The best practice, design or application for a specific job may vary according to climatic conditions and geographic location. Exclusion of certain practices from the manual does not mean such practices are unsatisfactory or inappropriate, and some geographic areas may employ area practices not included in the manual that are better or more appropriate than those included in the manual. Accordingly, the manual only should be used as a guideline and should not replace personal knowledge and experience. The science and art of roofing buildings and other enclosed structures continues to experience change spurred largely by technological innovations and new product developments. New and ongoing research constantly expands the industry s knowledge of roof systems and their design, materials and installation. This edition of The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 is an up-to-date, authoritative technical reference concerning the design, materials and installation of quality, long-lasting roof systems. In addition, NRCA intends to periodically update the manual as significant new information about roof systems and their design, materials and installation becomes available. Users of this manual seeking additional information or wishing to submit recommendations for revisions or additions to future editions of the manual should contact: The NRCA Roofing Manual Technical Services Section National Roofing Contractors Association W. Higgins Road, Suite 600 Rosemont, IL (847) Fax: (847) nrca@nrca.net NRCA gratefully acknowledges all its task force and committee members who contributed their time, effort and expertise to the development of The NRCA Roofing Manual: Metal Panel and SPF Roof Systems NRCA s Manual Update Committee primarily was responsible for researching and analyzing the manual s topics, as well as developing the text, figures and construction details contained in the manual. The members of the Manual Update Committee who participated in the manual s development include: Jim Barr Barr Roofing Co. Abilene, Texas Nelson Braddy King of Texas Roofing Co. LP Grand Prairie, Texas The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Foreword 5

6 Jim Brosseau Bennett & Brosseau Roofing Inc. Romeoville, Ill. Carl Clark Clark s Quality Roofing Inc. Salt Lake City Thomas R. Dessent Pine Roofing Co. Inc. Chicago Jean-Paul Grivas Ray Nolan Roofing Co. Inc. Louisville, Ky. Dave Karel Garlock-French Roofing Corp. Minneapolis Scott Kawulok B & M Roofing of Colorado Inc. Frederick, Colo. Rod Petrick Ridgeworth Roofing Co. Inc. Bridgeview, Ill. Robert S. Willis The Wehner Roofing & Tinning Co. Dayton, Ohio Dan Buckle CRS of Monroe Inc. Monroe, N.C. Billy Cone Roof Tech Roofing & Sheet Metal Fort Lauderdale, Fla. Will Fort III Fort Roofing & Sheet Metal Works Inc. Sumter, S.C. Allen Hughes CRS of Monroe Inc. Monroe, N.C. Bob Kulp Kulp s of Stratford LLC Stratford, Wis. Jude Laperouse Edward J. Laperouse Metal Works Inc. Houma, La. Kyle Thomas Thomas Roofing Co. Inc. Mobile, Ala. Jim Andersen of BASF Polyurethane Foam Enterprises LLC, Minneapolis, provided valuable input and guidance to NRCA s Manual Update Committee regarding the SPF Roof Systems section. Furthermore, members of NRCA s Technical Operations Committee and Executive Committee provided essential input and guidance to the Manual Update Committee and periodically reviewed and suggested revisions to the manual. In addition, NRCA acknowledges the efforts and expertise of its staff who were involved with the development and publication of the manual, including staff from its Technical Services Section, Technical Communications Section, and the editing and print production groups of the Communications and Marketing Section. 6 The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Foreword

7 TABLE OF CONTENTS Introduction...9 Metal Panel Roof Systems...13 SPF Roof Systems Appendixes The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Table of Contents 7

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9 INTRODUCTION The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 is a continuation of a long-standing series of publications from the National Roofing Contractors Association (NRCA) intended to provide in-depth, best industry practices and technical information concerning the design, materials and installation of quality roof systems. This manual is best used in conjunction with the other currently applicable editions of The NRCA Roofing Manual, including The NRCA Roofing Manual: Steep-slope Roof Systems, The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing, and The NRCA Roofing Manual: Membrane Roof Systems. History NRCA published its first manual, A Manual of Roofing Practice, in This was NRCA s first reference guide developed by roofing contractors to address good roofing practices. This manual was revised in 1971, 1973 and In its original and revised editions, A Manual of Roofing Practice primarily addressed roofing practices relating to built-up membrane roof systems. In 1981, the first edition of the manual, The NRCA Roofing and Waterproofing Manual, was published. This edition consisted of 442 pages and contained information about built-up and steep-slope roof systems (asphalt shingles and roll roofing, clay and concrete tile, slate, and wood shingles and shakes), waterproofing systems, a limited number of construction details and reprints of NRCA s then-current technical bulletins and Handbook of Accepted Roofing Knowledge (HARK). At the time the first edition was published, single-ply membrane roof systems were just beginning to enter the U.S. roofing market and, therefore, little information regarding single-ply membrane products and roof systems was included in this edition. An updated version of the first edition of the manual was published in 1983; this updated edition was still referred to as the first edition of the manual. Changes incorporated into the 1983 version of the manual included revised built-up roofing, HARK and glossary sections, and inclusion of the new technical bulletins released since the first edition was originally published in In 1985, a reformatted, updated and expanded second edition of The NRCA Roofing and Waterproofing Manual was published. This edition consisted of 702 pages and provided detailed information about single-ply membrane and polymer-modified bitumen sheet membrane roof systems, as well as a separate section providing specifications for membrane roof systems. In 1989, the third edition of the manual was published. This edition consisted of 726 pages and contained information updated from the second edition. In 1996, the fourth edition of The NRCA Roofing and Waterproofing Manual was published and consisted of a two-volume set containing 1,858 pages. The fourth edition represented a significant change from previous editions in that a vast majority of the text was rewritten. Also, new sections were added addressing metal roof systems, spray polyurethane foam (SPF) roof systems and The NRCA Energy Manual. In 2001, the fifth edition of The NRCA Roofing and Waterproofing Manual was published. The fifth edition consisted of a four-volume set containing 1,473 pages. It contained updated information from the fourth edition; the section addressing architectural sheet metal and metal roof systems and the section addressing SPF roof systems were significantly reformatted and updated. Also, for the first time, a new section addressing reroofing considerations was included in the manual. In September 2003 and January 2006, interim updates to the fifth edition were published. These interim updates incorporated new and updated information into the lowslope roof systems, steep-slope roof systems, architectural sheet metal and metal roofing, SPF roof systems, appendix and construction details sections of the manual, which resulted in the updated fifth edition containing 1,538 pages. These past editions of the manual are available for historical reference as The NRCA Roofing and Waterproofing Manual Anthology, a CD that can be purchased from NRCA. The NRCA Roofing Manual Beginning in 2007, NRCA initiated a new manual publication process. The manual no longer was published as a The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Introduction 9

10 complete set at one point in time. Instead, individual volumes of the manual are being published each year during a four-year period. The NRCA Roofing Manual: Membrane Roof Systems 2007 was published in January In January 2008, The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2008 was published. In January 2009, The NRCA Roofing Manual: Steep-slope Roof Systems 2009 was published. In January 2010, The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing 2010 was published. The combined set of these four volumes updates and supercedes The NRCA Roofing and Waterproofing Manual, Fifth Edition and is referred to as The NRCA Roofing Manual. Publication of The NRCA Roofing Manual: Membrane Roof Systems 2011 in January 2011 initiated the second four-year update cycle of The NRCA Roofing Manual. The NRCA Roofing Manual: Membrane Roof Systems 2011 is intended to update and supercede The NRCA Roofing Manual: Membrane Roof Systems This current volume, The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 is intended to update and supercede The NRCA Roofing Manual: Metal Panel and SPF Roof Systems At the time of publication of The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012, The NRCA Roofing Manual currently consists of the following volumes: The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 The NRCA Roofing Manual: Membrane Roof Systems 2011 The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing 2010 The NRCA Roofing Manual: Steep-slope Roof Systems 2009 The NRCA Roofing Manual: Metal Panel and SPF Roofing Systems 2012 The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 is divided into two primary sections: Metal Panel Roof Systems and SPF Roof Systems. Each of these sections is further divided into chapters. The Metal Panel Roof Systems section is divided into chapters as follows. Chapter 1 Structural Substrates Chapter 2 Guidelines Applicable to Metal Chapter 3 Guidelines Applicable to Metal Panel Roof Systems Chapter 4 Architectural Metal Panel Roof Systems Chapter 5 Structural Metal Panel Roof Assemblies Chapter 6 Fasteners Chapter 7 Roof Accessories Chapter 8 Roof System Configurations Chapter 9 Roof Re-covering Chapter 10 Construction Details The SPF Roof Systems section is divided into chapters as follows. Chapter 1 Roof Decks Chapter 2 Other Substrates Chapter 3 Spray Polyurethane Foam Chapter 4 Protective Surfacings Chapter 5 Roof Accessories Chapter 6 Roof System Configurations Chapter 7 Roof Re-covering Chapter 8 Construction Details Where appropriate, references are provided in The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 to other NRCA publications, including The NRCA Roofing Manual: Membrane Roof Systems; The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing; and The NRCA Roofing Manual: Steep-slope Roof Systems. These references are provided to direct users to additional useful information beyond what is specifically contained in this manual. 10 The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Introduction

11 Also, an appendixes section is provided containing contact information for organizations referenced in the manual and information regarding converting English-based inch-pound units of measurement into metric-based (SI) units of measurement. The NRCA Roofing Manual: Metal Panel and SPF Roof Systems 2012 Introduction 11

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