1、Designation: E2925 14E2925 17Standard Specification forManufactured Polymeric Drainage and Ventilation MaterialsUsed to Provide a Rainscreen Function1This standard is issued under the fixed designation E2925; the number immediately following the designation indicates the year oforiginal adoption or,
2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification is applicable to manufactured polymeric materials used to pro
3、vide a rainscreen function, a means for thedrainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly. Rainscreenmaterials that comply with this specification are intended to be used behind exterior cladding products and intended to cover oneh
4、undred percent (100 %) of the wall area that is designed to provide a rainscreen function to resist water infiltration.1.2 This specification addresses the following types of rainscreen materials:1.2.1 Type Aentangled mesh materials.1.2.2 Type Bformed/textured sheet material.1.2.3 Type Cformed batte
5、ns.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establis
6、h appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of In
7、ternational Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C578 Specification for Rigid, Cellular Polystyrene Thermal InsulationC1338 Test Method for Determining Fungi Resistance of In
8、sulation Materials and FacingsD3045 Practice for Heat Aging of Plastics Without LoadD5199 Test Method for Measuring the Nominal Thickness of GeosyntheticsD5322 Practice for Laboratory Immersion Procedures for Evaluating the Chemical Resistance of Geosynthetics to LiquidsD6108 Test Method for Compres
9、sive Properties of Plastic Lumber and ShapesD6364 Test Method for Determining Short-Term Compression Behavior of GeosyntheticsE84 Test Method for Surface Burning Characteristics of Building MaterialsE283 Test Method for Determining Rate ofAir Leakage Through Exterior Windows, Curtain Walls, and Door
10、s Under SpecifiedPressure Differences Across the SpecimenE631 Terminology of Building ConstructionsE2273 Test Method for Determining the Drainage Efficiency of Exterior Insulation and Finish Systems (EIFS) Clad WallAssembliesE2556/E2556M Specification for Vapor Permeable Flexible Sheet Water-Resisti
11、ve Barriers Intended for MechanicalAttachmentG154 Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials1 This specification is under the jurisdiction ofASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E
12、06.55 on Performanceof Building Enclosures.Current edition approved June 1, 2014June 1, 2017. Published June 2014August 2017. Originally approved in 2014. Last previous edition approved in 2014 as E2925-14.DOI: 10.1520/E29251410.1520/E2925-17.2 For referencedASTM standards, visit theASTM website, ww
13、w.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume 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 wh
14、at changes have been made to the previous version. Becauseit may not be technically possible to adequately 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 th
15、e official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 Other Standard:3CAN/CGSB 51.33-M89 Vapor Barrier Sheet, Excluding Polyethylene, for Use in Building Construction3. Terminology3.1 DefinitionsFor definitions of ge
16、neral terms related to building construction used in this specification, refer to TerminologyE631.3.2 Definitions of Terms Specific to This Standard:3.2.1 capillary action, vliquid water movement against gravity induced by the force of molecular attraction (surface tension)between the water and the
17、material it contacts, facilitated by a small gap between materials.3.2.2 exterior cladding, nweather-exposed materials of a wall assembly including but not limited to siding, stucco, masonryveneer, but excluding fenestration (doors and windows).3.2.3 mortar screen, nlayer of material designed to pre
18、vent mortar from entering the drainage space.3.2.4 polymeric, nmaterials composed primarily of polymers.3.2.5 polymeric rainscreen material, nmaterial intended to be installed behind exterior cladding products which creates adrainage and ventilation space for liquid and vapor moisture that enters an
19、 above-grade exterior wall assembly reducing watertransfer to the water resistive barrier (WRB).3.2.6 rainscreen space, nseparation behind the cladding in the wall assembly intended to inhibit capillary action and moisturebridging as well as to promote ventilation and the drainage of moisture.3.2.7
20、water-resistive barrier (WRB), nmaterial that is intended to resist liquid water that has penetrated the cladding system.4. Classification4.1 Type Aentangled mesh materials.4.2 Type Bformed/textured sheet material.4.3 Type Cformed battens.5. Materials and Manufacture5.1 Description of the material c
21、omposition and structure shall be made available upon request.5.1.1 Descriptions of the materials shall include roll or package weight and dimensions.5.1.2 Descriptions of the material composition shall include linear density (basis weight).5.1.3 All materials claiming compliance with this specifica
22、tion shall be described in such statements as described in allapplicable test reports.6. Material Properties6.1 Ventilation/Airflow Test:6.1.1 The airflow rate shall be measured in accordance with Annex A1.6.2 Drainage Test:6.2.1 The drainage test shall be conducted in accordance with Annex A2.6.3 T
23、hickness Test:6.3.1 The thickness shall be measured in accordance with Test Method D5199 at 0.20 kPa.6.4 Compression Test:6.4.1 The compressive strength for Type A and B shall be determined in accordance with Test Method D6364 at 10 %compression and at full yield (if yield occurs).6.4.2 The compress
24、ive strength for Type C shall be determined in accordance with Test Method D6108.6.5 UV Exposure Test:6.5.1 The test specimens shall be exposed in accordance with Practice G154 following Cycle 1 for 336 h.6.5.2 After the UV exposure test has been completed, the compression test (6.4) shall be repeat
25、ed.6.6 Heat Aging:6.6.1 The test specimens shall be heat aged in accordance with Practice D3045 at a temperature of (7763)C3) C for 90 days.6.6.2 After the heat aging test has been completed, the thickness test (6.3) and the compression test (6.4) shall be repeated.6.7 Mold and Fungi Resistance:3 Av
26、ailable from Canadian General Standards Board, Place du Portage III, 6B1, 11 Laurier Street, Board (CGSB), 11 Laurier St., Phase III, Place du Portage, Gatineau,Quebec K1A 1G60S5, Canada, http:/www.tpsgc-pwgsc.gc.ca/ongc-cgsb.E2925 1726.7.1 The specimens shall be tested in accordance with Test Metho
27、d C1338 for 28 days exposure.6.8 Water Exposure:6.8.1 The specimens with dimensions (250 6 2) mm by (250 6 2) mm shall be immersed in water in accordance with PracticeD5322 using tap water at (50 6 2)C2) C for 168 h.6.8.2 After the water exposure test has been completed and within one hour of remova
28、l from the water, the compression test(6.4) shall be repeated.6.9 Flame Spread Test (Optional):6.9.1 When desired, the material shall be tested in accordance with Test Method E84 for flame spread.6.10 Freeze-Thaw (Optional):6.10.1 The freeze-thaw exposure shall be conducted in accordance with the ag
29、ing procedure of Section 8.3.2.1 of CAN/CGSB51.33-M89.6.10.2 After the freeze thaw exposure test has been completed and within one hour of the completion of the test, thecompression test (6.4) shall be repeated.7. Material Performance Requirements7.1 All materials shall provide the minimum performan
30、ce requirements listed in Table 1.8. Sampling8.1 The material to be tested for conformance to this specification shall be taken directly from a randomly selected roll orpackage which is representative of the commercial product.9. Specimen Preparation9.1 The specimens from roll materials shall be cut
31、 from the interior of the sample roll so that no specimen edge is nearer than75 mm to the original roll edge.9.2 Unless otherwise stated in the test method, all specimens shall be conditioned for a minimum period of 40 h at (23 62)C2) C and (50 6 10) % 10) % relative humidity (RH).9.3 The specimen s
32、ize shall be determined by the test method.9.4 If not otherwise specified in the referenced test method, a minimum of five specimens shall be tested and each specimenshall meet the minimum performance requirements.10. Reporting Requirements10.1 Report required and declared test data in the form of a
33、 table(s) with property, result and pass/fail status including resultsfor all properties tested.10.2 In addition to the information specified in the individual test methods, all reports describing the testing of the material inaccordance with the specification shall include the following information
34、:10.2.1 date test conducted;10.2.2 manufacturers name, address, production facility address and product designation;10.2.3 type and name of the material and other material description;TABLE 1 Material Performance RequirementsTest Method Units Performance RequirementsMinimumVentilation/Airflow 3.1 L/
35、s DeclareDrainage 3.2 % DeclareThickness 3.3 mm 5CompressionStrength3.4 kPa DeclareUV Exposure 3.5 % 80 % of the compression strengthbefore UV exposureHeat Aging 3.6 % 80 % of the compression strengthbefore heat agingMold/Fungal Growth 3.7 visual no visible mold or fungi growthon the test specimensW
36、ater Exposure 3.8 % 80 % of the compression strengthbefore water exposureOptional TestsFlame Spread 3.9 . DeclareFreeze/Thaw 3.10 . 80 % of the compression strengthbefore freeze thawE2925 17310.2.4 description of the material composition and structure;10.2.5 lot number and manufactured date;10.2.6 e
37、xpiration date; if applicable;10.2.7 material sampling procedure used;10.2.8 description of test apparatus, calibration standards used and their source;10.2.9 name and location of laboratory performing the tests and the accreditation agency for the laboratory;10.2.10 description of the specimen prep
38、aration;10.2.11 size of specimens used for each test (length, width (or diameter) and thickness);10.2.12 declaration of conformity with this specification;10.2.13 if the standard requirements were modified, a statement in the test report and a complete description of themodifications;10.2.14 results
39、 of drainage test shall be reported as the percentage and weight of water drained from the test wall assembly (withand without insect screen), and the percentage and weight of the water retained in the test wall assembly;10.2.15 the compression test results shall provide the complete compression cur
40、ve;10.2.16 the compression test values shall be reported at 10 % compression and at yield for each sample, and the average valuesshall be calculated;10.2.17 the flame spread test results shall include the flame spread rating and smoke developed index;11. Marking and Labeling11.1 The material shall b
41、e marked or labeled with manufacturer name and product name.12. Packaging and Package Marking12.1 The information on the material or packaging shall include the manufacturers name, product name, and reference to thisspecification.12.2 Installation instructions shall be provided as part of the packag
42、ing and shall include as a minimum.12.2.1 maximum weather exposure time allowed before cladding shall be installed;12.2.2 type of mechanical fastener;12.2.3 minimum fastener spacing to attach the material to the underlying structure; and12.2.4 minimum over lapping requirements.13. Keywords13.1 drain
43、age plane; rainscreen; water-resistive barrier; weather-resistive barrierANNEXES(Mandatory Information)A1. DRAINAGE AND VENTILATION/AIRFLOW TESTA1.1 ObjectiveA1.1.1 The objective of this test is to measure the assemblys ability to allow for ventilation from the bottom of the specimen upand behind th
44、e cladding. Due to the design of the test apparatus, a separate specimen; other than that which is tested for drainage,shall be permitted to be tested. The air flow testing procedure is designed to determine the amount of airflow under a range ofrelatively low air pressure differences in a wall cavi
45、ty created by the rainscreen material, over the height of a wall, which areunderstood to be in the range of 1 to 10 Pa under most natural exposure conditions.A1.2 Test ApparatusA1.2.1 Construct one 1200 mm a test apparatus using 50 by 100 mm wood framing material. The perimeter framing shall be 1200
46、mm wide by 2400 mm test wall assembly comprised of 50 mm by 100 mm (nominal) perimeter framing and 50 mm by 100 mm(nominal) framing vertically at high, outside dimensions. Two wood framing members, spaced 400 mm on center. Install a woodpanel of 11 mm oriented strand board (OSB)center shall be inser
47、ted in the 1200 mm width. All framing members shall be securedat each joint using #10 by 75 mm wood screws. Install a 6 mm (nominal) clear polycarbonate sheet to the framing and fasten with10d fasteners at 200 mm on center. Install a water resistive barrier (WRB) complying with Specificationmembers
48、to simulate bothE2925 174the sheathing and the water resistive barrier. Secure the polycarbonate sheet E2556/E2556M on the OSB in a seamless, continuousmanner.to the framing members by drilling holes in the polycarbonate material and installing #10 by 25 mm wood screws every200 mm (nominal).NOTE A1.
49、1If the rainscreen material used in the test also qualifies as a WRB, a separate WRB between the rainscreen material and the OSB is notrequired.A1.2.2 Install the rainscreen material being tested over (on the exterior side of) the WRB polycarbonate sheet in accordance withthe polymeric rainscreen material manufacturers instructions. The instructions shall include the perimeter conditions (that is,flashing/assembly details at the top and bottom of the wall assembly). The sides of the test apparatus with the rainscreen materialinstalled shall be complete
