1 Exam Prep NRCA Roofing Manual: NRCA Roofing Manual: Membrane Roof Systems 2011 Tabs and Highlights

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1 1 Exam Prep NRCA Roofing Manual: NRCA Roofing Manual: Membrane Roof Systems 2011 Tabs and s These 1 Exam Prep Tabs are based on the National Roofing Contractors Association (NRCA) manual listed below: Membrane Roof Systems Each 1 Exam Prep tabs sheet has five rows of tabs. Start with the first tab at the first row at the top of the page; proceed down that row placing the tabs at the locations listed below. Place each tab in your book setting it down one notch until you get to the last tab. Then start with the highlights. Special Note to our Students: If you are a 1 Exam Prep student, here is how to really get the most from the 1 Exam Prep Tabs. Follow the above instructions, but before placing the tab, find the tab's topic in the outline of your appropriate module. Now locate and highlight several items listed in the outline just before the topic, and just after. See how the topic fits in the outline and how it relates as a concept to the broader concept spelled out in the outline. If you take a few minutes to do this, when you take the test, key words in the test questions will remind you of where the information is in the manual! 1 Exam Prep Tab Table of Contents 7 Chapter 1 - Roof 13 Decks Chapter 2 - Air & Vapor 35 Retarders Chapter 3 - Rigid Board 41 Insulation Chapter 4 - Roof 77 Membranes Bitumen (Modified) 80 Single-Ply Roof 97 Membranes Chapter 5 - Fasteners 107 Chapter 6 - Surfacings 119 Chapter 7 -Roof Accessories 135 Ch. 8 - Roof Sys. 139 Configurations Chapter 9 - Roof Exam Prep NRCA Membrane Roof Systems

2 1 Exam Prep Tab Re-Covering Chapter 10 - Construction 239 Details Index of Construction Details 255 This concludes the tabs for this book. Please continue with the highlights on the below. 13 "The following types of roof decks are addressed in this manual: (6 bullets)." 14 Structural Support: "A roof deck transfers live and dead loads to supporting framing members (e.g. joists, purlins, subpurlins). Live loads include environmental loads, such as wind, snow, rain and ice, and other nonstationary loads such as workers and mobile installation equipment." "Dead loads include stationary loads, such as topside and underside mechanical equipment, weight of the deck, any sheathing overlayment. roof membrane, insulation and ballast." 15 Slope and Drainage: "Most building codes require a minimum roof slope for roofing projects. - "The criterion for judging proper slope for drainage is that there be no ponding water on the roof 48 hours after a rain during conditions conducive to drying. Slope generally is provided by: (3 bullets)." Steel: "Steel roof decks are constructed of cold-rolled steel sheets or panels with ribs formed in each panel to provide strength and rigidity." Note and highlight definition and figure for: Narrow-rib Steel Deck (Type A): Intermediate-rib Steel Deck (Type F): and "Wide-rib Steel Deck (Type B) Structural Concrete: "There are two general types of structural concrete used in roof decks: normalweight structural concrete and light-weight structural concrete." 28 Attachment of Roof System Components: "Structural concrete roof decks are considered to be "nonnailable": that is. mechanical fasteners such as screws and plates and nails are not used to attach rigid board insulation, base sheets or membrane components." "Rigid board insulation installed directly over structural concrete roof decks should be applied using hot bitumen or cold-applied adhesive." Wood Panels: "There are two general types of wood panels used for roof decks: Plywood and oriented strand board (OSB)." 35 "NRCA defines the terms "air retarder" and "vapor retarder" as follows: Air retarder: Layer(s) of material used to minimize the amount of air intrusion and air leakage into and out of a roof assembly. Vapor retarder: Layer(s) of material or a laminate used to reduce the flow of water vapor into a roof system." 1 Exam Prep NRCA Membrane Roof Systems

3 42 "The purpose of roof insulation is to provide a substrate for the application of a roof membrane and thermal resistance." "Roof insulation that is properly manufactured, designed and installed serves several vital purposes: (6 bullets)." 42 Desirable Properties of Roof Insulation: Note and highlight the 10 different desirable properties. 42 Types of Roof Insulation: Note and highlight the ten different types of roof insulation. 44 Principles of Thermal Insulation: "The primary function of insulation is to provide thermal resistance." Note and highlight the four different principles: Thermal conductivity (k); Thermal conductance (c); Thermal resistance (R); and The overall coefficient of thermal transmission (U). 45 Table: U-Value and Nominal R-Value Wood Fiberboard: The common R-value used to calculate the total thermal resistance of a wood or cane fiberboard insulation system is about 2.78 per inch of thickness." 66 R-value: "The common R-value used to calculate the total thermal resistance of a wood or can fiberboard insulation system is about 2.78 per inch of thickness." Tapered Insulation: "Tapered insulation can be used to meet the requirements for slope in new construction and reroofing projects, as well as in cases where a roof deck will not provide adequate slope to drain water off a roof surface." 68 Design Criteria: "When deciding whether a tapered insulation system should be used and how it should be designed, there are numerous criteria that must be considered." Note the 6 bulleted criteria Thermal Insulation Value: Note the definitions for Minimum R-Value/Minimum Thickness and Average R-Value. 77 "A majority of low-slope roof systems in North America use roof membranes to serve as the weatherproof coverings for roof assemblies." "This chapter describes four types of common roof membranes: built-up membranes, polymer-modified bitumen sheet membranes, single-ply membranes, and liquid-applied membranes." 78 Slope and Drainage: Note and highlight the definition. 78 Material Delivery and Storage: Note and highlight the definition. 78 Weather Conditions During Application: Note and highlight the definition Built-up Roof Membranes: Note and highlight the definition. 80 Table: Asphalt 80 "Currently. asphalts complying with ASTM D312, Type 1 or Type II are seldom used." "For mop application of asphalt, EVT is the temperature at wich asphalt has a viscosity of 125 centipoise (cp). For mechanical spreader application of asphalt, EVT is the temperature at which the asphalt has a viscosity of 75 cp." "NRCA recommends at the point of application asphalt be within a 25-degree range from the asphalt's EVT." 1 Exam Prep NRCA Membrane Roof Systems

4 81 Table: Application Temperature Range for Asphalt; 81 Polymer-modified Asphalt: Note and highlight the definition. 81 Coal Tar: Note and highlight the definition. Table: Coal Tar 82 "The recommended EVT for coal tar is the temperature at which the coal tar has a viscosity of 25 centipoise (cp)." 82 Table: Application Range for Coal Tar 82 Reinforcement Felts and Sheets: "Roll-roofing materials used as reinforcement inbuilt-up roof membrane construction fall into three categories as follows: (3 bullets)." Base Sheets: Note and highlight the definitions for the following: Asphalt coated Fiberglass-mat Base Sheet, and Asphalt-coated Fiberglass Venting Base Sheets. 83 Ply Sheets: Note and highlight the definitions for the for following: Asphalt Fiberglass Ply Sheets, and Coal Tar Impregnated Fiberglass Ply Sheet 83 Mineral-surfaced Cap Sheets: Note and highlight the definitions for: Asphalt- Fiberglass Cap Sheet Surfaced with Mineral Granules. 85 Membrane Flashings: Note and highlight the definitions for the following: SBS Polymer-modified Bitumen Base Sheets, SBS Polymer-modified Bitumen Cap Sheets, and APP Polymer-modified Bitumen Sheets. 86 Polymer-modified Bitumen Adhesive: -There currently are no ASTM International standards for polymer-modified bitumen adhesives and mastics." 86 Application of Built-up Membrane Materials: Note and highlight the definition Polymer-modified Bitumen Roof Membranes: "Polymer-modified roof membranes are composed of reinforcing fabrics, usually polyester, fiberglass or both, that serve as the carriers for the polymermodified bitumen as it is manufactured into a roll material." 89 "The principal components used in constructing polymer-modified bitumen roof membranes are: (5 bullets)." Base Layer: The following base sheets are used in polymer-modified bitumen roof membranes: (Note and highlight the definitions for the following: Asphalt-coated Fiberglass-mat Base Sheet; Asphaltcoated Fiberglass Venting Base Sheet; SBS Polymer-modified Asphalt-coated Base Sheet; APP Polymer-modified Asphalt-coated Base Sheets; Self-adhering (SA) Polymer-modified Bitumen Base Sheets Interply Sheets: Note and highlight the definitions for the following: Asphalt, Fiberglass Ply Sheet; APP Polymer-modified Interply Sheets; SBS Polymermodified Bitumen Interply Sheets; and Selfadhering (SA) Polymer-modified Bitumen Interply Sheets. 93 Membrane Flashings: Note and highlight the definition. 1 Exam Prep NRCA Membrane Roof Systems

5 Single-ply Roof Membranes: "There are three common subcategories of thermoset roof membranes: (3 bullets)." "There are four common subcategories of thermoplastic membranes: (4 bullets)." 98 Ethylene Propylene Diene Monomer (EPDM): EPDM is a synthetic rubber material that can be formulated with extensive flexibility for use as membrane sheet roofing." "EPDM sheets used for roofing applications are usually black in color and range in thickness from 45 mils to 120 mils." 99 Chlorosulfonated Polyethylene (CSPE): "CSPE is a synthetic rubber material commonly called Hypalon Tm, which is a proprietary trade name of the compound developed by E.I. DuPont de Nemours & Co. Inc." "CSPE roof membranes are produced in thicknesses ranging from 45 mils to 60 mils though thicker materials may be available on special order." "CSPE membrane laps typically are seamed by hotair welding." 99 Polyisobutylene (PIB): "Field lap seams in PIB membranes are typically constructed using a sealing tape that is factory-applied at the sheets' edges for seaming." "PIB membranes used for roofing are typically white and range in thickness from 85 mils to 100 mils." 100 Ketone Ethylene Ester (KEE): "KEE membranes are available in a range of thicknesses, including 36 mils, 45 mils, 50 mils, 60 mils and 90 mils." "KEE membrane laps are seamed by hot-air welding according to the specific manufacturer's recommendations." 100 Polyvinyl Chloride (PVC): "PVC membranes are produced in a range of thicknesses, including 36 mils, 45 mils, 60 mils, 72 mils, and 90 mils." 101 Thermoplastic Polyolefin (TPO): "TPO membranes are available in a range of thicknesses, including 45 mils, 60 mils, 72 mils, 80 mils, and 90 mils." 102 PVC Alloys: "The following types of membranes may be classified as PVC alloys: (3 bullets)." "CPA membranes typically are produced in thicknesses ranging from 30 mils to 60 miles." "CPA membranes laps are seamed by heat-welding according to a specific manufacturer's recommendations." "EIP membranes are compounded with PVC and ethylene interpolymer stabilizers..." "These membranes typically are 32 mils to 60 mils thick." "Laps typically are seamed by hot-air welding according to a manufacturer's recommendations." "NBP membranes are compounded with PVC..." "NBP membranes may be 30 mils to 40 mils thick,..." "NBP membrane laps typically are seamed by hotair welding." Membrane Fasteners: Note and highlight the definition. 119 "Membrane surfacing is the component that protects the weatherproofing component of some roof systems from the effects of direct sunlight, ultraviolet rays, and weather exposure." Note and highlight this complete paragraph. 1 Exam Prep NRCA Membrane Roof Systems

6 Aggregate: "When aggregate is used to surface a built-up roof system, it generally is for the following reasons: (7 bullets)" 121 Table: Aggregate Gradation. Table Ballast: "When single-ply membrane sheets are used in loose-laid, ballasted configurations, the surfacing commonly used are rounded aggregate or concrete roof pavers." Roof Coating Types: Most roof coatings consist of two general components: Primer and Coating." Note and highlight the definitions for each type of coating. 132 Table: Roof Membrane Type Vegetative Roofs: "A vegetative roof is an area of planting or landscaping installed on a waterproofed substrate at any building level that is over habitable space." Note and highlight this complete paragraph. 135 "Examples of pre-manufactured accessories that may be encountered on a membrane roof system include: (4 bullets)." 139 Note that this section provides a list of reference pages for each of the roof assembly components addressed Introduction to Re-covering Membrane Roofing: "When roof system maintenance and repair can no longer prevent recurrent leakage or extend a roof system's useful service life, consideration need to be given to reroofing - either roof re-covering or roof removal and replacement. Reroofing should also be considered in other situations, including the following: (4 bullets)." 1 Exam Prep NRCA Membrane Roof Systems