General Index - National Roofing Contractors Association

3. Type (ASTM standard designation)4. Overall thickness5. Tensile strength6. Breaking strength7. Elongation8. Seam strength9. Retention of properties after heat aging10. Tear resistance11. Tear strength12. Low temperature bend13. Accelerated weathering14. Linear dimensional change15. Change in weight after water immersionReporting of test result data in Items 3 though 15 isbased on American Society for Testing and Materials(ASTM) Standard D4434-95, titled “Specification forPoly (Vinyl Chloride) Sheet Roofing.”Warranty information for PVC single-ply membrane roofsystems is provided in Section 5: Roof MembraneWarranties.Users of the guide who are interested in additionalinformation regarding PVC single-ply membrane roofsystems are encouraged to refer to The NRCA Roofingand Waterproofing Manual, Fourth Edition.EPDM Single-Ply MembraneAn ethylene propylene diene monomer (EPDM), orterpolymer, single-ply membrane is factorymanufacturedthermoset single-ply membrane that isprincipally composed of two components, ethylene andpropylene. When these components are combinedwith diene, a flexible rubber matrix is formed. EPDMsingle-ply membranes are available in two types, nonreinforcedand reinforced.Information on EPDM single-ply membrane sheetproducts is presented in the guide in two parts: Part 1:General Information and Part 2: Test Results.Specific information included in Part 1: GeneralInformation is as follows:1. Company name2. Product name3. Product description4. Coatings required5. Use in6. Field lap joint method7. Types of roof systems8. Minimum slope required9. Acceptable substrates10. Restricted regions11. Workable temperature range12. Flashing material13. Flashing method14. Preformed accessories available15. Country of origin and manufacture16. Year of first commercial use17. Number of squares installed18. Methods of distribution19. Number of regional locations20. Licensed applicator agreement21. Sales information contact22. Technical information contactIn Part 2: Test Results, specific information included isas follows:1. Company name2. Product name3. Grade4. Class5. Thickness6. Breaking strength7. Tensile strength8. Ultimate elongation9. Tensile set10. Tear resistance11. Tearing strength12. Brittleness point13. Ozone resistance14. Heat aging15. Water absorption16. Factory seam strength17. Weather resistanceReporting of test result data for Items 3 though 17 isbased upon American Society for Testing and Materials(ASTM) Standard D4637-96, titled “Specification forVulcanized Rubber Sheet Used in Single-Ply RoofMembrane.”Warranty information for EPDM single-ply membraneroof systems is provided in Section 5: Roof MembraneWarranties.Users of the guide who are interested in additionalinformation regarding EPDM single-ply membrane roofsystems are encouraged to refer to The NRCA Roofingand Waterproofing Manual, Fourth Edition.CSPE Single-Ply MembraneA chlorosulfonated polyethylene (CSPE) single-plymembrane is factory-manufactured thermoset singleplymembrane that is principally composed of asynthetic rubber material commonly called Hypalon,which is a proprietary trade name of a compounddeveloped by E.I. duPont de Nemours & Co., Inc.Information on CSPE single-ply membrane sheetproducts is presented in the guide in two parts: Part 1:General Information and Part 2: Test Results.Specific information included in Part 1: GeneralInformation is as follows:29