1、Designation: D 6630 08Standard Guide forLow Slope Insulated Roof Membrane AssemblyPerformance1This standard is issued under the fixed designation D 6630; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、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 guide lists test methods intended to establish aminimum level of performance for insulated roof membraneassemblies, and lists pert
3、inent design guidelines and installa-tion methods in a unified manner. Material tests and evalua-tions are included with and without roof insulation.1.2 It is not possible to establish a precise correlationbetween laboratory tests on roof assemblies and natural weath-ering due to variations in geogr
4、aphical climate, design, mate-rial and installation.1.3 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 the applica-bility of
5、 regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD 2523 Practice for Testing Load-Strain Properties of Roof-ing MembranesD 4434 Specification for Poly(Vinyl Chloride) Sheet Roof-ing
6、D 4637 Specification for EPDM Sheet Used In Single-PlyRoof MembraneD 4798 Practice for Accelerated Weathering Test Condi-tions and Procedures for Bituminous Materials (Xenon-Arc Method)D 4799 Practice for Accelerated Weathering Test Condi-tions and Procedures for Bituminous Materials (Fluores-cent U
7、V, Water Spray, and Condensation Method)D 5019 Specification for Reinforced CSM (Chlorosul-fonated Polyethylene) Sheet Used in Single-Ply RoofMembraneD 5147 Test Methods for Sampling and Testing ModifiedBituminous Sheet MaterialD 5601 Test Method for Tearing Resistance of Roofing andWaterproofing Ma
8、terials and Membranes3D 5602 Test Method for Static Puncture Resistance ofRoofing Membrane SpecimensD 5635 Test Method for Dynamic Puncture Resistance ofRoofing Membrane SpecimensD 5849 Test Method for Evaluating Resistance of ModifiedBituminous Roofing Membrane to Cyclic Fatigue (JointDisplacement)
9、E 96/E 96M Test Methods for Water Vapor Transmission ofMaterials2.2 ASCE Standard:ASCE-7 Minimum Design Loads for Buildings and OtherStructures42.3 ANSI/SPRI Standard:ANSI/SPRI RP-4 Wind Design Guide for Ballasted SinglePly Roof Systems53. Terminology3.1 roof assembliesthe weathering or waterproofin
10、g ma-terial, whether film, flexible membrane, semi-flexible mem-brane, factory or field manufactured; the underlying substrateincluding insulation (if used) above or below the membrane, orboth; supporting deck structure and method of attachment ofthe entire assembly. Low slope roof assemblies may be
11、 up to25 % slope. Some roof assemblies may accommodate higherslopes.3.2 performancethe ability of the roof system as de-signed, manufactured, and installed to provide adequate levelsof expected service life in terms of watertightness, thermal1This guide is under the jurisdiction of ASTM Committee D0
12、8 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.20 on RoofingMembrane Systems.Current edition approved March 15, 2008. Published July 2008. Originallyapproved in 2001. Last previous edition approved in 2001 as D 6630 01.2For referenced ASTM standards, visit the AST
13、M 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 website.3Withdrawn.4Available from American Society of Civil Engineers (ASCE), 1801 AlexanderBell Dr., Reston, VA
14、20191, http:/www.asce.org.5Available from American National Standards Institute and Single Ply RoofingInstitute, 200 Reservoir St., Suite 309A, Needham, MA 02194.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.protection, and condens
15、ation control, while being maintain-able. Live loading of the roof system may also occur.4. Significance and Use4.1 Aroof assembly must work as a system.Any componentof the roof assembly demonstrating an inherent weakness orinability to perform will diminish the roof system performanceand service li
16、fe expected. This guide lists minimum perfor-mance attributes required of low slope roof assemblies. Prod-ucts not previously used as roof membrane materials requireadditional tests beyond the scope of this document. This guideis not intended for use on in-service roofing materials. Roofmembranes an
17、d other components should conform to ASTMproduct standards, if available.5. Roof Design Classifications5.1 Type of Construction:Class ConstructionI New NewII Replace Remove existing roof membrane (and existing insulation, ifnecessary) and replaceIII Re-cover Re-cover existing roof membrane5.2 Method
18、s of Attachment:Roof Membrane Configuration Method of AttachmentMethod A Adhered Uses a variety of adhesives includinghot and cold applied.Method B Loose laid ballasted Uses aggregate ballast or pavers.Structure needs capacity to carry bal-last dead load.Method LD Loose laid air pressureequalization
19、 valvesUses air pressure equalization valvewith loose laid membrane tightly sealedat edge. Needs airtight deck.Method M Partially attached/mechanically fastenedUses a variety of fasteners and attach-ment schemes that anchor membraneto roof deck for uplift resistance.Method P Protected membrane Uses
20、aggregate ballast, pavers, orother dead load devices for wind upliftresistance of extruded polystyrene.6. Roof Material Attributes6.1 The roof membrane and insulated roof system shall betested according to the procedures in Table 1. In addition, theroof membrane shall meet specific test requirements
21、 whereidentified.7. Design of Roofing Assembly7.1 The roofing system may consist of the following func-tional layers from the bottom to the top:7.1.1 Structural deck;7.1.2 Air retarder;7.1.3 Vapor retarder;7.1.4 Thermal insulation; and7.1.5 Roofing membrane7.2 The following paragraphs list the minim
22、um designrequirements for each functional layer of the roof assembly.These may exceed the requirements of the local building code.7.2.1 Structural DeckThe structural deck shall have thecapacity to support the full design load, including dead load,live loads, and environmental loads anticipated or ma
23、ndated bycode. The dead load of the roof system shall be included as partof the design load. Deck deflection should be limited to L/240under full design load. Ponding due to deck deflection shouldnot occur. Provide overflow drains or scuppers when interiordrains are used. The live load capacity shal
24、l not be less than 98Kg/m2(20 psf) and should have adequate capacity to resistconstruction loads.7.2.2 Air RetarderAir retarders are used to retard the flowof air from the interior into the roof system. When air retardersare used properly, they reduce the effects from wind on someroofing systems. Wi
25、th care, the vapor retarder and air retarderfunctions may be provided by the same materials.7.2.3 Vapor RetarderThe vapor retarder retards the trans-fer of the moist-warm interior vapor into the roofing system. Avapor retarder should be used on the warm side of the systemover moist occupancies, and
26、at locations where the quantity ofmoisture accumulated in the winter exceeds the moisturecapacity of the materials in the system.7.2.4 Thermal InsulationThermal insulation must be usedwherever a building is heated or cooled except industrialfacilities where excess process heat needs to be dissipated
27、.Where used, it should be installed in two or more layers withoffset joints. Tapered insulation can be used where necessary toprovide a positive slope to the drains. Provide sump areas at allroof drains to assist drainage. The insulation selected must becompatible with the membrane system selected a
28、nd have theheat, moisture stability and compressive resistance needed forthe application selected.7.2.5 Roofing MembraneThe roofing membrane may besingle ply or multi-ply, depending on the materials involved.Where applicable, the properties of the roof membrane shallmeet or exceed the minimum values
29、 shown in Table 1 beforeand after artificial weathering, heat conditioning, water immer-sion, and fatigue cycling.7.3 Roof System Design:7.3.1 The membrane material selected for use shall pass thetests outlined in Section 6, modified to reflect the weatherextremes anticipated for the locality of use
30、, including wind.7.3.2 All classes of roof construction should have a positiveslope to drain (2 % minimum for new construction, other thancoal tar roof assemblies and l % minimum for new constructionfor coal tar roof assemblies).7.3.3 Consideration for use of a vapor retarder should begiven for all
31、new roof construction and roof replacementconstructions. Roof re-cover constructions shall be evaluatedas a roof system with the existing roof serving as a vaporretarder, unless the existing roof membrane is cut open beforere-cover.7.3.4 Roof re-cover constructions should have no entrappedmoisture g
32、reater than the equilibrium moisture content (forinsulation material) at 21C (70F) and 90 % relative humidity,or make provisions to handle entrapped moisture in a timelyfashion without degradation to the roofing assembly.D66300827.3.5 Mechanical fasteners that hold the membrane down,either directly
33、or indirectly, shall be considered active fasten-ers. All other fasteners shall be considered passive. All fasten-ers shall be evaluated for corrosive resistance per Section 4.1of the SPRI Guide.6Report amount of surface corrosionobserved.7.3.6 Method M roofs using mechanical fasteners shouldhave a
34、factor of safety of 2.0 against fastener pullout.7.3.7 Wind uplift forces should be determined according toASCE-7. Roof system wind uplift resistance shall have aminimum 2.0 factor of safety. For ballasted single ply roofs useANSI/SPRI RP-4 for determining their wind uplift resistance.7.3.8 Deck and
35、 wall movements should be accounted for inthe design, including differential movements of discrete ele-ments.7.3.9 Design elevation of adjoining deck elements shall notdiffer by more than 6 mm (0.25 in.) in elevation change.NOTE 1Interior drains are recommended in climates where ice forms;they shoul
36、d be installed in the heated areas of buildings, where possible;reduce or omit insulation around drains. Gutters are only recommended inwarmer climates, or where interior drains are not practical. Scuppers aregenerally used as emergency overflow for roofs with parapets; sizescuppers large enough to
37、allow for prompt drainage based on local rainintensity records. No part of the roofing system should be permitted toblock the prompt drainage of water.NOTE 2Mechanical ProtectionThe mechanical protection layerhelps resist impact, external fire, and in some assemblies, also protects themembrane from
38、destructive solar radiation. Metallic skins, aggregate,stone ballast, granules, and concrete pavers are frequently used.6Flexible Membrane Roofing: A Professionals Guide to Specifications, pub-lished by Single Ply Roofing Institute, Needham, MA.TABLE 1 Roof Material AttributesProperty CriteriaA. Sta
39、tic indentation resistanceUse Test Method D 5602.Tested at 18C, 23C, 70C (0F, 73F, 158F).Test membrane with specified insulation system over rigid concrete support.Concrete to have 50 mm (2 in.) minimum thickness with minimum compressive strength of17.2 MPa (2 500 psi). If no insulation is used, rep
40、ort none.Report static puncture resistance per Section 11 of TestMethod D 5602 for each test temperature.B. Dynamic indentation resistanceUse Test Method D 5635.Tested at 18C, 23C, 70C (0F, 73F, 158F).Test membrane with specified insulation system over rigid concrete support.Concrete to have compres
41、sive strength of 17.2 MPa (2 500 psi). If no insulation isused, report none.Report dynamic puncture resistance per Section 12 of TestMethod D 5635 for each test temperature.C. Cyclical fatiguemembrane onlyUse Test Condition 3 of Test Method D 5849 at 0C (32F).Run 500 cycles. Report results per Secti
42、on 11 of TestMethod D 5849. If less than 500 cycles, report cyclesachieved and failure mode.D. Heat conditioningUse this sequence of tests on new roof membranes intended for exposure (smooth or granulesurfaced, plain or reinforced).Membrane materials without existing ASTM material standards should f
43、ollow the test conditionscited below based on color. Membrane materials with existing ASTM material standards shoulduse the heat conditioning test called for.1. For black membrane materials28 days at 80C (176F) Report change in tensile strength and elongation.Report changes in sample dimension and t
44、hickness.2. For gray membrane materials28 days at 70C (158F) Report change in tensile strength and elongation.Report changes in sample dimension and thickness.3. For white membrane materials28 days at 60C (140F) Report change in tensile strength and elongation.Report changes in sample dimension and
45、thickness.E. UV radiationmembrane onlyA1. For unsurfaced membranes, use Practices D 4798 or D 4799 for a minimumof 4000 h. Report test cycle employed and number of test cycles completed, along with thelevel of irradiation used for D 4798; report test cycle employed andnumber of cycles completed alon
46、g with fluorescent lamps used for D 4799.1. 5.5C (10F) change in low temperature flex.2. Report change in tensile strength and elongation.3. No cracks.4. Report visual appearance and note color change, if any.2. The two different types of exposures may produce different test results. Therefore,they
47、cannot be used interchangeably without supporting data that demonstrates equivalencyof the procedures for the materials tested.3. The duration of the UV radiation shall be sufficiently long enough to differentiate amaterial that weathers poorly from one that has acceptable weathering performance.F.
48、Water exposuremembrane only1. Run 45 cycles of immersion in water at 23C and 50C (62C) (73F and 122F 64F) for 24 hfollowed by dark oven heat aging at 70C (158F) for 24 h. Determine moisture content accordingto Test Method D95for membrane at start of test and after 45th cycle.1. 1 % change in weight.
49、2. Report visual appearance and note color change, if any.G. Moisture permeancemembrane only1. Determine according to Test Methods E 96.Use Procedure B or BW at 23C (73F)1. 0.10 perms.2. Report conditioning, procedure and test temperature usedand results.H. Tear resistancemembrane only1. Conduct tear resistance test at 18C, 23C and 70C (62C) (0F, 73F and 158F 64F) perTest Method D 5601.1. Report tear resistance per Section 7 of Test MethodD 5601 for each temperature tested.I. Tensile strength, elongation, strain energyM
