1、Designation: E2556/E2556M 09Standard Specification forVapor Permeable Flexible Sheet Water-Resistive BarriersIntended for Mechanical Attachment1This standard is issued under the fixed designation E2556/E2556M; the number immediately following the designation indicates the yearof original adoption or
2、, 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.1. Scope1.1 This specification is limited to vapor permeable flexiblesheet materials which
3、are intended to be mechanically attachedand are generally installed behind the cladding system inexterior walls.1.2 This specification is limited to the evaluation of mate-rials and does not address installed performance. Although thefastening practices (type of fastener, fastening schedule, etc.)ma
4、y affect the installed function of these materials, they are notincluded in this specification.1.3 This specification does not address integration of thewater-resistive barrier with other wall elements. The topic isaddressed in more detail in Practice E2112 and Guide E2266.1.4 The values stated in e
5、ither 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 non-conformancewith the standard.1.5 This stan
6、dard 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 the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 A
7、STM Standards:2D226 Specification forAsphalt-Saturated Organic Felt Usedin Roofing and WaterproofingD779 Test Method for Water Resistance of Paper, Paper-board, and Other Sheet Materials by the Dry IndicatorMethodD828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-E
8、longation Appara-tus3D882 Test Method for Tensile Properties of Thin PlasticSheetingD4869 Specification forAsphalt-Saturated Organic Felt Un-derlayment Used in Steep Slope RoofingD5034 Test Method for Breaking Strength and Elongationof Textile Fabrics (Grab Test)E96/E96M Test Methods for Water Vapor
9、 Transmission ofMaterialsE631 Terminology of Building ConstructionsE1677 Specification for an Air Barrier (AB) Material orSystem for Low-Rise Framed Building WallsE2112 Practice for Installation of Exterior Windows, Doorsand SkylightsE2128 Guide for Evaluating Water Leakage of BuildingWallsE2136 Gui
10、de for Specifying and Evaluating Performance ofSingle Family Attached and Detached DwellingsDurabilityE2266 Guide for Design and Construction of Low-RiseFrame Building Wall Systems to Resist Water IntrusionG154 Practice for Operating Fluorescent Light Apparatusfor UV Exposure of Nonmetallic Material
11、s2.2 Other Standards:AATCC Test Method 127 Water Resistance: HydrostaticPressure Test4CGSB CAN2-51.32.M77 Sheathing Membrane, BreatherType51This specification is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.55on Exterior
12、 Building Wall Systems.Current edition approved Nov. 1, 2009. Published March 2010. DOI: 10.1520/E2556_A2556M-09.2For 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
13、 standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from American Association of Textile Chemists and Colorists(AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http:/www.aatcc.org.5Ava
14、ilable from Canadian General Standards Board (CGSB), Gatineau, QuebecK1A 1G6, Canada, http:/www.tpsgc-pwgsc.gc.ca/cgsb.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Federal Specification UU-B-790a Federal SpecificationBuilding Pape
15、r, Vegetable Fiber (Kraft, Waterproofed,Water Repellant and Fire Resistant)6TAPPI T-410 Test Method for Grammage of Paper andPaperboard (Weight Per Unit Area)7UBC Standard 14-1 Kraft Waterproof Building Paper8UBC Standard 32-1 Asphalt Saturated Rag Felt8ICC-ES Acceptance Criteria AC38 for Water-Resi
16、stive Bar-riers93. Terminology3.1 DefinitionsFor definitions of general terms related tobuilding construction used in this specification, refer to Termi-nology E631.3.2 Definitions of Terms Specific to This Standard:3.2.1 felt-based barrierasphalt-saturated organic felts thatcomply with Specificatio
17、n D226 and are intended for use aswater-resistive barriers.3.2.2 paper-based barrierbuilding papers composed pre-dominantly of sulfate pulp fibers that comply with FederalSpecification UU-B-790a and that are intended for use aswater-resistive barriers.3.2.3 polymer-based barrierplastic sheet materia
18、ls for useas water-resistive barriers. These materials are generally re-ferred to as a housewrap or building wrap. These materials canbe perforated with small holes or may be non-perforated,composed of films or non-woven materials.3.2.4 Type I WRBwater-resistive barrier with base-levelwater resistan
19、ce (see Table 1).3.2.5 Type II WRBwater-resistive barrier with enhancedwater resistance (see Table 1).3.2.6 Water-Resistive Barrier (WRB)a material that isintended to resist liquid water that has penetrated the claddingsystem.NOTE 1Wall assemblies often include two lines of defense againstrain water
20、 ingress. The cladding serves as the first line of defense and thewater-resistive barrier as the second line of defenseNOTE 2Water-resistive barriers are sometimes referred to as weatherresistant barriers or sheathing membranes.4. Classification4.1 This specification covers vapor permeable flexible
21、sheetmaterials that are classified as Type I and Type II, which aredetermined by the degree of water resistance. The water-resistive barrier material composition shall determine thespecific test method used to measure physical and mechanicalproperties (see Table 1). Appendix X1 provides explanatoryi
22、nformation on the physical and mechanical property testmethods.5. Materials and Manufacture5.1 Description of the material composition and structureshall be made available upon request.5.1.1 Descriptions of the materials shall include roll weightand dimensions.5.1.2 Descriptions of the material comp
23、osition shall includelinear density (basis weight). Basis weight shall be measuredusing TAPPI T-410.6Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.7Available from Technical Association of the P
24、ulp and Paper Industry (TAPPI),15 Technology Parkway South, Norcross, GA 30092, http:/www.tappi.org.8Uniform Building Code (UBC) information is available from InternationalCode Council (ICC), 500 New Jersey Ave., NW, 6th Floor, Washington, DC20001-2070, http:/www.iccsafe.org.9Available from the ICC
25、Evaluation Service (ICC-ES), 5360 Workman MillRoad, Whittier, CA 90601, http:/www.icc-es.org.TABLE 1 Requirements for Water Resistive BarriersTest Requirement Specimen Type Test MethodMinimum Performance RequirementsType I Type IIDry tensilestrength or drybreaking force(choose 1)(1) asmanufacturedan
26、d(2) aged inaccordancewith A1.2Test Method D828 for paperand felt materials, or3500 N/m (20 lb/in.) minimum (machine and cross direction)Test Methods D882 forpolymeric materials, or3500 N/m (20 lb/in.) minimum (machine and cross direction)Test Method D5034 (GrabMethod)178 N (40 lbf) minimum (machine
27、 direction)156 N (35 lbf) minimum (cross direction)Water resistancetest (choose 1)(1) asmanufacturedand(2) aged inaccordancewith A1.2Test Method D779, or 10 min minimum 60 min minimumWater Resistance PondingTest (A1.1), orNo water shall transmit throughthe membrane in 120 minnot applicableAATCC Test
28、 Method 127except that the specimensshall be held at ahydrostatic head of55 cm (21.6 in.)not applicable No leakage is permitted to the undersideof any specimen in 300 minWater vaportransmissiontestas received Test Method E96/E96M(Dessicant Method)290 ng/(Pa s m2) (5 perms) minimumPliability test as
29、received see A1.3 The material shall not crack when bent over a 1.6 mm (116-in.)diameter mandrel at a temperature of 0C (32F)E2556/E2556M 0926. Performance Requirements6.1 All products seeking compliance with this specificationshall conform to the minimum performance requirements listedin Table 1. S
30、ampling and specimen size shall be in accordancewith the referenced test methods. If not otherwise specified inthe referenced test method, a minimum of five specimens shallbe tested and all specimens shall meet the minimum perfor-mance requirements.NOTE 3The laboratory accelerated-ultraviolet (UV)/c
31、ondensation ex-posure procedure specified in A1.2 is not intended to represent a specificservice exposure. It is a method of comparing the stability of materialsunder consistent laboratory exposure conditions.7. Other Requirements7.1 The material shall not adhere to itself to an extent thatwill caus
32、e tearing or other damage on unrolling.8. Sampling8.1 The product to be tested for conformance to thisspecification shall be taken directly from a randomly selectedroll which is representative of commercial product.8.2 The specimens shall be cut from the interior of thesample roll so that no specime
33、n edge is nearer than 75 mm (3in.) to the original sample edge.8.3 Unless otherwise stated, all specimens to be tested shallbe conditioned for a minimum period of 40 h at 23 6 2C (73.46 4F) and 50 6 5 % relative humidity (RH).9. Marking and Labeling9.1 The finished product shall be marked or labeled
34、 withproduct identification.9.2 Installation instructions shall be provided and shallinclude as a minimum the maximum weather exposure timeallowed before cladding shall be installed, type of mechanicalfastener and minimum fastener spacing to attach the WRB tothe underlying structure, and lapping and
35、 taping requirements.This information shall be recorded and reported in any appli-cable test report or product rating.10. Keywords10.1 building felt; building paper; building wrap; house-wrap; sheathing membrane; water-resistive barrier; weather-resistive barrierANNEX(Mandatory Information)A1. TEST
36、METHODS AND PRACTICESA1.1 Water Resistance Ponding TestA1.1.1 ScopeThis is a test method intended for evaluatingthe water resistance of a Type I water-resistive barrier.A1.1.2 Significance and UseThis method is for use withwater-resistive barriers.A1.1.3 Procedure:A1.1.3.1 Five specimens will be cho
37、sen at random from thematerial supplied.A1.1.3.2 A ring shall be constructed with a sample of themembrane fastened between two 200-mm (8-in.) diameteraluminum rings using a rubber-type gasket. The membraneshall be placed between the rings and cupped to permit a depthof 25 mm (1 in.) of water to be e
38、xposed to 16 000 mm2(25in.2) of its surface.A1.1.3.3 Distilled water shall be poured into the cylinder toa depth of 25 mm (1 in.).A1.1.3.4 The ring shall be raised by 250 mm (9.8 in.) abovea sheet of plain kraft paper placed underneath the membrane toaid in monitoring any passage of water.A1.1.3.5 T
39、he membrane shall be maintained at constantconditions of temperature (23 6 2C (73.4 6 4F) and RH (506 5 %) and be inspected at frequent intervals over a period of2 h for water passage through the barrier material.A1.1.4 Report:A1.1.4.1 The report shall include the following:(1) The material and the
40、side tested.(2) The material sampling procedure used.(3) Pass/fail test results for each specimen tested.(4) Any modification to the method.A1.1.5 Precision and BiasNo information is presentedabout either the precision or bias of this test method forevaluating water resistance since the test result
41、is nonquanti-tative.A1.2 Accelerated Aging (UV Exposure and CyclicDrying/Wetting)A1.2.1 ScopeThis practice is used to condition samples ofwater-resistive barriers to evaluate degradation of performancedue to accelerated aging (UV exposure and dry/wet cycling).A1.2.2 Significance and UseThis practice
42、 is not intendedto represent a service exposure. It is a method of comparing thestability of materials under consistent laboratory exposureconditions.A1.2.3 Procedure:A1.2.3.1 Three samples shall be conditioned at 23 6 2C(73 6 4F) and 50 6 5 % RH for a minimum of 40 h. Onesample shall be used for pr
43、eparing unexposed specimens. Twosamples shall be exposed to UV radiation, followed byexposure to drying and wetting cycles in accordance withA1.2.3.2 of this specification.A1.2.3.2 Two samples shall be exposed to fluorescent UVA-340 lamps in a fluorescent UV condensation apparatus oper-ated in accor
44、dance with Practice G154, Cycle 1. The samplesshall be exposed for a duration of 2 weeks (336 h). UVradiation exposure shall be directed on the sample surfaces thatwill be exposed to sunlight in normal applications.E2556/E2556M 093A1.2.3.3 Three specimens shall be cut from the samplesThat have been
45、exposed to UV radiation and subjected tofurther accelerated aging consisting of 25 cycles of drying andsoaking as follows:(1) Oven drying at 49C (120F) for 3 h, with all surfacesexposed.(2) Immersion in room-temperature (23 6 2C (73 6 4F)water for 3 h, with all surfaces submerged.(3) After removal f
46、rom the water, specimens shall beblotted dry, then air-dried for 18 h at a 23.8 6 2.8C (75 65F) room temperature, with all surfaces exposed.A1.3 PliabilityA1.3.1 ScopeThis is the test method intended for evalu-ating the pliability of a water-resistive barrierA1.3.2 Significance and UseThis method is
47、 for use withwater-resistive barriersA1.3.3 Procedure:A1.3.3.1 Five specimens will be chosen at random from thematerial supplied.A1.3.3.2 Each specimen is bent 180 6 5 over a 1.6 mm(116 in.) mandrel in 2 6 1s.A1.3.3.3 The specimen and mandrel shall be maintained atconstant conditions of temperature
48、(0 6 2C (32 6 4F) duringthe test procedure.A1.3.4 Report:A1.3.4.1 The report shall include the following:(1) The material tested.(2) The material sampling procedure used.(3) Observations of any visual cracking.(4) Any modification to the method.A1.3.5 Precision and BiasNo information is presentedabo
49、ut either the precision or bias of this test method forevaluating pliability since the test result is non-quantitative.APPENDIXES(Nonmandatory Information)X1. EXPLANATORY INFORMATION ON MECHANICAL AND PHYSICAL TEST METHODSINTRODUCTIONX1.1 There are a number of attributes of WRBs that shouldbe considered in their selection. These include water resistance,water vapor permeance, air resistance, durability10compatibil-ity with other materials, cost, installation challenges, and more.There are three different base materials that make up T
