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Designation: D227/D227M − 03 (Reapproved 2024)Standard Specif i cation forCoal-Tar Saturated Organic Felt Used in Roof i ng andWaterproof i ng 1This standard is issued under the f i xed designation D227/D227M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.This specif i cation replaces Federal specif i cation HH-R-595, Type 15C.1. Scope1.1 This specif i cation covers coal-tar saturated organic feltintended to be used with coal-tar pitches conforming to theappropriate requirements of Specif i cation D450/D450M in theconstruction of built-up roofs and in the construction ofwaterproof i ng systems.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in nonconformancewith the standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 2D146/D146M Test Methods for Sampling and TestingBitumen-Saturated Felts and Woven Fabrics for Roof i ngand Waterproof i ngD450/D450M Specif i cation for Coal-Tar Pitch Used inRoof i ng, Dampproof i ng, and Waterproof i ngD1079 Terminology Relating to Roof i ng and Waterproof i ng3. Terminology3.1 Def i nitions—For def i nitions of terms used in thisspecif i cation, refer to Terminology D1079.4. Materials and Manufacture4.1 In the process of manufacture, a single thickness of dryfelt shall be saturated with ref i ned coal-tar from which some ofthe more volatile constituents have been removed.4.2 The felt shall be produced principally from organicf i bers or mixtures thereof. The surface of the felt shall beuniform and relatively smooth. Upon splitting or tearing on thebias, the felt shall appear reasonably free of lumps and particlesof foreign substances.5. Physical Requirements5.1 The material shall conform to the physical requirementsprescribed in Table 1.5.2 The f i nished product shall not crack nor be so sticky asto cause tearing or other damage upon being unrolled attemperatures between 10 and 60 °C [50 and 140 °F].6. Workmanship, Finish, and Appearance6.1 The felt shall be saturated and shall show no unsaturatedspots at any point upon cutting 50 mm [2 in.] wide strips atrandom across the entire sheet and splitting them open to theirfull length.6.2 The surface of the felt shall not be coated or coveredwith talc or other substances that would tend to interfere withadhesion between the felt and the plying cement.6.3 The f i nished material shall be free of visible externaldefects such as holes, ragged or untrue edges, breaks, cracks,tears, protuberances, and indentations.7. Sampling and Test Methods7.1 Sample the material and determine the properties enu-merated in this specif i cation in accordance with Test MethodsD146/D146M.8. Inspection8.1 Inspection—Inspection shall be in accordance with therequirements of this specif i cation.1 This specif i cation is under the jurisdiction of ASTM Committee D08 onRoof i ng and Waterproof i ng and is the direct responsibility of Subcommittee D08.04on Felts, Fabrics and Bituminous Sheet Materials.Current edition approved Aug. 1, 2024. Published August 2024. Originallyapproved in 1925. Last previous edition approved in 2018 as D227/D227M – 03(2018). DOI: 10.1520/D0227_D0227M-03R24.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at www.astm.org/contact. For Annual Book ofASTM Standards volume information, refer to the standard’s Document Summarypage on the ASTM website.Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1