1、Designation: D6757/D6757M 16aD6757/D6757M 18Standard Specification forUnderlayment Felt Containing Inorganic Fibers Used inSteep-Slope Roofing1This standard is issued under the fixed designation D6757/D6757M; the number immediately following the designation indicates theyear of original adoption or,
2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers (1) inorganic fiber-reinforced organic felt underlayme
3、nt and (2) inorganic fiber-based felt for useas underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing andevaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing product
4、s.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance
5、with the standard.1.3 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specification: This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establis
6、h appropriate safety safety, health, and healthenvironmental practices and determine the applicability ofregulatory requirements prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Princi
7、ples for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D146/D146M Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for
8、Roofing andWaterproofingD228/D228M Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used inRoofing and WaterproofingD1079 Terminology Relating to Roofing and WaterproofingD4869/D4869M Specification for Asphalt-Saturated Organic Felt Underlayment Used
9、 in Steep Slope RoofingF1087 Test Method for Linear Dimensional Stability of a Gasket Material to Moisture3. Terminology3.1 DefinitionsFor definitions of terms used in this specification, refer to Terminology D1079.4. Classification4.1 Organic felts that are reinforced with inorganic fibers are cove
10、red by this specification.4.2 Inorganic fiber-based asphaltic and nonasphaltic felts are covered by this specification.5. Materials and Manufacture5.1 In the process of manufacture, a single thickness of inorganic mat or organic felt that is reinforced with inorganic fibers shallbe uniformly saturat
11、ed or coated.1 This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02 on SteepRoofing Products and Assemblies.Current edition approved July 1, 2016May 1, 2018. Published July 2016May 2018. Originally app
12、roved in 2002. Last previous edition approved in 2016 asD6757/D6757M 16.D6757/D6757M 16a. DOI: 10.1520/D6757_D6757M-16A.10.1520/D6757_D6757M-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvo
13、lume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to ade
14、quately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
15、cken, PA 19428-2959. United States16. PerformancePhysical Requirements6.1 The material shall conform to the physical requirements prescribed in Table 1.6.2 The finished product shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at temperaturesbetween 1 and 60C 3
16、0 and 140F. The finished product shall pass the water shower exposure test in accordance with 8.1.4,indicating resistance to liquid water transmission.7. Dimensions, Masses, Workmanship, Finish, and Appearance7.1 Dimensions and masses to be agreed upon between buyer and seller.7.2 The finished mater
17、ial shall be free of visible external defects, such as holes, ragged or untrue edges, breaks, cracks, tears,bulges, and indentations.8. Sampling and Test Methods8.1 Sample the material and determine the properties enumerated in this specification in accordance with Test MethodsD146/D146M.8.1.1 Tear
18、StrengthUse test method in accordance with Test Methods D228/D228M.8.1.1.1 Precision and BiasA precision and bias statement is to be determined.8.1.2 Pliability TestUse test method in Test Methods D228/D228M.8.1.3 Behavior on HeatingUse test method in Test Methods D228/D228M.8.1.4 Liquid Water Trans
19、missionUse test method in accordance with Specification D4869/D4869M.8.1.4.1 Precision and BiasNo statement is made about either the precision or bias of this test method of measuring resistanceto liquid water transmission since the result merely states whether or not there is conformance to the cri
20、teria specified in theprocedure.8.2 Determine the dimensional stability of the product by Test Method F1087 except as modified here.8.2.1 Three specimens shall be dried per Section 7.2 of Test Method F1087 for Dimensional Stability to Low Humidity. Recordthe length of the specimens after drying as t
21、he low-humidity length of the specimens.8.2.2 The specimens are then tested according to Section 7.3 of Test Method F1087 for Dimensional Stability to High Humidity.Measure the specimens in the same place as previously measured and record as high-humidity length.8.2.3 Report the results as percent d
22、imensional change from low humidity to high humidity calculated using the followingequation:8.2.3.1 Low humidity to high humidity:L%5Lh 2LlLl3100 (1)where:Ll = low humidity length of specimen,Lh = high humidity length of specimen, andL% = the percent change in length from low to high humidity.8.2.4
23、Calculate and report the average percent change in length of the three individual specimens. The change reported is thechange from low humidity to high humidity.8.2.5 Precision and BiasTo be determined.9. Inspection9.1 Inspection of the material shall be made as agreed upon between the purchaser and
24、 the supplier as a part of the purchasecontract.TABLE 1 PerformancePhysical RequirementsTear strength, min at 23 2C,73 4F, N, lbf4.0, 0.88 (in anydirection)Pliability at 23 2C, 73 4F, the tenstrips tested shall not crack whenbent 90 at a uniform speed over a19 mm 0.75 in. radius corner in 2 spassBeh
25、avior (loss) on heating at 105C221F for 5 h, max, %4Liquid water transmission test passDimensional stability,low humidity to high humidity,max elongation, %1.65D6757/D6757M 18210. Rejection and Resubmittal10.1 Failure to conform to any of the requirements prescribed in this specification shall const
26、itute grounds for rejection. In caseof rejection, the seller shall have the right to re-inspect the rejected material and resubmit the lot after removal of those packagesnot conforming to the requirements.11. Packaging and Package Marking11.1 Unless otherwise agreed upon between the supplier and pur
27、chaser, each product package shall be plainly marked with thesuppliers name, the product brand, and the ASTM designation.11.2 The rolls shall be securely wrapped or banded in a manner that completely encircles the roll and will prevent slipping orunrolling.11.3 No roll shall contain more than two pi
28、eces, and no more than 3 % of the rolls in any lot shall contain two pieces. If a rollcontains a manufacturing splice, the splice shall be clearly marked.12. Keywords12.1 coated fiberglass mat; fiberglass; inorganic fibersreinforced; organic felt; steep roofing; underlaymentASTM International takes
29、no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own respo
30、nsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed
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