1、Designation: D1970/D1970M 16Standard Specification forSelf-Adhering Polymer Modified Bituminous Sheet MaterialsUsed as Steep Roofing Underlayment for Ice DamProtection1This standard is issued under the fixed designation D1970/D1970M; the number immediately following the designation indicates theyear
2、 of original adoption or, 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 polymer modified bituminoussh
3、eet materials intended for use as underlayment on roof eaves,or valleys, or both, to prevent leakage of shingle, tile, or metalroofs from water back-up due to ice dams.1.2 These underlayment sheets have a sticky adhesive layerwhich is exposed by removal of a protective sheet. The topsurface is suita
4、ble to work on during the application of theexposed roofing.1.3 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. Combiningva
5、lues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine
6、the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D228/D228M Test Methods for Sampling, Testing, andAnalysis of Asphalt Roll Roofing, Cap Sheets, andShingles Used in Roofing and WaterproofingD903 Test Method for Peel or Stripping Strength of Adhe-si
7、ve BondsD1079 Terminology Relating to Roofing and WaterproofingD1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD2523 Practice for Testing Load-Strain Properties of Roof-ing MembranesD4073 Test Method for Tensile-Tear Strength of Bitumi
8、nousRoofing MembranesD5147/D5147M Test Methods for Sampling and TestingModified Bituminous Sheet MaterialD7349/D7349M Test Method for Determining the Capabil-ity of Roofing and Waterproofing Materials to Seal aroundFastenersE96/E96M Test Methods for Water Vapor Transmission ofMaterials3. Terminology
9、3.1 DefinitionsFor definitions of terms used in thisspecification, refer to Terminology D1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 lotfor the purpose of sampling, a lot shall consist ofall material manufactured in one production run (not to exceed24 h) using the same source of ra
10、w materials.4. Workmanship, Finish, and Appearance4.1 The underlayment sheet shall be supplied in roll form.4.2 The underlayment sheet shall be substantially uniformin thickness and appearance. It shall be free of visible defectssuch as holes, ragged or untrue edges, breaks, cracks, tears,protuberan
11、ces, and indentations, except for those perforationsor protuberances which are intentional.4.3 The surface of the underlayment sheet shall be designedto provide traction and slip resistance to the applicator.NOTE 1The intent of 4.3 is to recognize that surface slipperiness isimportant when working o
12、n a roof and, while no test method is specifiedin this standard, several methods for assessing the relative slipperiness ofsurfaces are available. It is the further intent of this paragraph to ensurethat, whatever method is used, the friction coefficient or resistance toslipping of the surface of th
13、ese products should be at least as great asasphalt-saturated felt shingle underlayment tested under the same condi-tions of temperature and wetness as agreed between purchaser and seller.4.4 Sheet sections shall be suitable for joining by themanufacturers recommended procedure. The entire lower1This
14、 specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.02on Steep Roofing Products and Assemblies.Current edition approved Nov. 1, 2016. Published November 2016. Originallyapproved in 1990. Last previous edition
15、 approved in 2015 as D1970/D1970M 15a.DOI: 10.1520/D1970_D1970M-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM we
16、bsite.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1surface of the underlayment sheet shall be capable of beingfully adhered to the roof deck.5. Physical Requirements5.1 The underlayment sheet shall conform to the physicalrequiremen
17、ts prescribed in Table 1.5.2 The underlayment sheet shall not crack nor be so stickyas to cause tearing or other damage upon being unrolled atmaterial temperatures between 4.4 and 60C 40 and 140F.6. Sampling6.1 From each lot of underlayment sheet, select sample rollsin accordance with Test Methods D
18、228/D228M.6.2 The rolls so selected shall constitute the representativesample used for all subsequent observations and tests pertain-ing to the lot of material being examined.7. Test Methods7.1 ConditioningUnless otherwise specified, conditiontest specimens for at least4hat236 2C 73.4 6 3.6F and50 6
19、 5 % relative humidity prior to testing.7.2 Thickness:7.2.1 Measure the thickness of the roofing underlayment inaccordance with Test Methods D5147/D5147M.7.2.2 Report the number of measurements, the average andstandard deviation across the sheet.7.3 Maximum Load and Elongation at BreakThis testmetho
20、d covers the determination of the maximum load andelongation at break of the underlayment sheets, as set forth inPractice D2523 except as noted below.7.3.1 Specimens:7.3.1.1 Prepare five specimens from each sample roll inboth the longitudinal and transverse directions. Specimensshall be 25 mm 1 in.
21、65 % wide by a minimum of 150 mm6 in. 65 % long. For materials with high elongation thelength of the sample may be reduced to 100 mm 4 in. 65%if necessary to avoid limitations imposed by dimensions of thetest machine.7.3.2 Procedure:7.3.2.1 Condition each specimen at least2hat236 2C73.4 6 3.6F.7.3.2
22、.2 Use a constant rate of elongation (CRE) tensiontesting machine, preferably with automatic load and strainrecording equipment and clamps that permit a uniform clamp-ing pressure on the specimen without slipping. The initialclamp separation shall be a minimum of 75 mm 3 in. 65%for sheets having an
23、ultimate elongation of 75 % or less at23.9C 75F and 50 mm 2 in. 65 % for sheets having anultimate elongation greater than 75 % at 23.9C 75F.7.3.2.3 Maintain a rate of separation of 50 mm 2 in. 63%per min.7.3.2.4 Record the percent elongation of each specimen atthe visual break of the modified bitume
24、n portion using anextensiometer, or mark the extension at visual break of themodified bitumen portion from the chart of the stress versustime (knowing the speed of the chart drive and the jawseparation rate).7.3.2.5 Record the maximum load attained by each speci-men.7.3.3 Calculation:7.3.3.1 Determi
25、ne the percent elongation at break of themodified bitumen portion obtained from the extensiometer inaccordance with the manufacturers instructions, or read di-rectly. Calculate the percent elongation from the chart asfollows:% Elongation 5ab3100% (1)where:a = extension at modified bitumen break (ext
26、ension at breakon chart jaw separation rate divided by chart speed),andb = initial jaw separation.7.3.3.2 Determine the average percent elongation at breakof the modified bitumen portion in each direction.7.3.3.3 Calculate the average maximum load in each direc-tion.7.3.4 ReportFor each set of five
27、specimens in each direc-tion report the individual measurements, the average andstandard deviation for the size of specimen (initial lengthbetween jaws), maximum load in kN/m lbf/in., percentelongation at modified bitumen break, and method of deter-mining elongation.7.4 Adhesion to PlywoodThis test
28、method covers thedetermination of the adhesive properties of the underlaymentsheets to plywood, as set forth in Test Method D903 except asnoted below.7.4.1 Specimen Preparation:7.4.1.1 The test specimen shall consist of one piece ofunderlayment sheet, 75 6 2 by 200 6 2mm36 0.125 by 86 0.125 in., bon
29、ded for 15 in.2(75 125 mm) 3 by 5 in. toone piece of 6 mm 14 in. minimum thick plywood, APAGrade, Exposure 1, 75 by 150 mm 3 by 6 in. The plywoodmust not be reused for testing.TABLE 1 Physical Requirements of Self-Adhering PolymerModified Bituminous Sheet Materials Used as Steep RoofingUnderlayment
30、for Ice Dam ProtectionProperty SI Inch-PoundThickness, min 1.0 mm 40 milsMaximum load, minLongitudinal 4.4 kN/m 25 lbf/in.Transverse 4.4 kN/m 25 lbf/in.Elongation at break, min of modifiedbitumen portion10 %Adhesion to plywood, min at 40F 0.92 kgf/30.5 cm 2.0 lbf/ft widthAdhesion to plywood, min at
31、75F 5.44 kgf/30.5 cm 12.0 lbf/ft widthThermal stability, max 3 mm 0.1 in.Flexibility at 29C 20F passTear resistanceLongitudinal, min 89 N 20 lbfTransverse, min 89 N 20 lbfMoisture vapor permeance, max 5.7 ng/Pa.S.M.20.1 U.S. PermsSealability around nail passWaterproof integrity of lap seam passD1970
32、/D1970M 1627.4.1.2 Roll test specimen three times back and forth with aroller which has a mass of 11.8 kg 26 lb 60.5 %, diameter of125 mm 5 in. 65 %, and width of 125 mm 5 in. 65%(2to 3 s per cycle).7.4.1.3 At least five specimens shall be tested for each testtemperature.7.4.1.4 It is recommended th
33、at specimens be assembledindividually. Cutting specimens to size after assembly mayinfluence the test results.7.4.2 ConditioningThe test shall be performed at 23 62C 73.4 6 3.6F and 4 6 2C 39.2 6 3.6F. Materialsused to construct test specimens and the roller, must beconditioned at the test temperatu
34、re for at least 4 h prior toassembly. Similarly, test specimens must be conditioned at thetest temperatures for at least 1 h prior to testing.NOTE 2Adhesion to other potential wood deck materials may bedetermined by this test method, but it has been observed that substratessuch as APA approved nonve
35、neer sheets typically give greater adhesionvalues than the minimum specified in this standard for plywood.7.4.3 Apparatus:7.4.3.1 Perform the test in a constant rate of extension typetester.7.4.3.2 The rate of travel of the power-actuated grip shall be50 mm 2 in./min 63 %. This rate which provides a
36、 laminateseparation rate of 25 mm 1 in./min 63 % shall be uniformthroughout the test.7.4.4 Procedure:7.4.4.1 Conduct the test after the test specimens have beenconditioned at the test temperature (in the environmentalchamber) for 15 min.7.4.4.2 Separate the free end of the underlayment sheetfrom the
37、 plywood for a distance of about 50 mm 2 in. leavingabout 75 mm 3 in. of bonded length. Place the specimen inthe testing machine by clamping the free end of the plywood inone grip, turning back the free end of the sheet and clampingit in the other grip. Maintain the specimen in the approximateplane
38、of the clamps during the test. Peel at least three quartersof the bonded area, even though a peel or stripping value maybe indicated before this point.7.4.5 CalculationDetermine the peel strength on the chartas the average load line that will visually accommodate therecorded curve. Record the load s
39、o indicated, corrected fortare.7.4.6 ReportingFor each series of tests, report the numberof measurements, the average, and the standard deviation of allthe test values in kg/30.5 cm width lb/ft of width.7.5 Thermal StabilityThis test method determines thethermal stability of the underlayment sheets
40、as set forth in TestMethod D1204, except as noted below.7.5.1 Specimens:7.5.1.1 The test specimen shall consist of one piece ofunderlayment sheet, 100 6 2by1006 2mm46 0.125 by4 6 0.125 in., centered and bonded (as described in 7.4.1)toone piece of 6 mm 14-in. minimum thick plywood, (APAGrade, Exposu
41、re 1) 150 6 2by2006 2mm66 0.125 by 86 0.125 in.7.5.1.2 At least five specimens shall be tested for eachsample roll.7.5.2 Procedure:7.5.2.1 Set specimens at a 45 angle in a hot air circulatingoven maintained at 70 6 2C 158 6 4F for 14 days.7.5.2.2 At the end of the oven-exposure period, allowspecimen
42、s to equilibrate to 23.9 6 1.1C 75 6 2F and 50 65 % relative humidity for at least 4 h.7.5.2.3 From the lower edge of the sheet measure to thenearest 2.5 mm 0.1 in. the furthest point of modified bitumenflow. Estimate the average flow across the entire lower edge ofthe sample.7.5.3 ReportReport the
43、individual specimen values, theaverage and the standard deviation.7.6 Flexibility at 29C 20FThis test method deter-mines the low temperature flexibility of the underlaymentsheets. For the sheet material to be given a pass rating in thistest, the material must demonstrate either no visible signs ofcr
44、acking after bending at the test temperature through an angleof 180 6 5 around a 25 mm 1 in. 65 % diameter mandrelin 2 6 1 s, or minor surface cracking is observed in one ormore specimens that have been bent over the mandrel and ahead of water confirmation, performed on a sheet of materialthat has b
45、een subjected to this bending, yields a passing result.7.6.1 SpecimensPrepare five specimens from each roll inboth the longitudinal and transverse direction. Specimens shallbe 25 mm 1 in. 65 % wide by 150 mm 6 in. 65 % long.Remove the release liner from each specimen.7.6.2 ConditioningCondition spec
46、imens and mandrel in arefrigeration unit for a minimum of2hat296 2C 20 63.6F.7.6.3 Procedure:7.6.3.1 After the specimens have been conditioned, conductthe test at 29 6 2C 20 6 3.6F. Position the center of thespecimen firmly on the mandrel with the weathering side up.Bend the projecting ends without
47、exerting any stress other thanthat required to keep the specimen in contact with the mandrel.Complete the entire procedure inside the refrigerated unitwithin 2 6 1 s. Bend the specimen until the projecting ends ofthe specimen are parallel to each other keeping the bottomsurface in contact with the m
48、andrel through an arc of 180 6 5.Repeat this procedure using a different specimen and bend withthe weathering side down.7.6.3.2 Remove the specimen from the refrigerated unit andimmediately inspect for any signs of cracking.7.6.3.3 Repeat the procedure for any remaining specimens.If the temperature
49、of the refrigeration unit increases duringtesting, allow the refrigeration unit to equilibrate to testtemperature prior to testing subsequent samples.7.6.3.4 All specimens must pass at the test temperature of29 6 2C 20 6 3.6F. Report as a pass if no cracking isvisible on any specimen. If cracking is visible on anyspecimen, performance of a head of water confirmation isrequired.7.6.3.5 Head of Water ConfirmationIf visible cracking isobs
