1、Designation: C 208 08Standard Specification forCellulosic Fiber Insulating Board1This standard is issued under the fixed designation C 208; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in pare
2、ntheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the principal cellulosic fiberinsulating b
3、oard types, grades, and sizes. Requirements arespecified for composition, construction, physical properties,tolerances, sampling procedures, and test methods.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI uni
4、ts that are provided for information onlyand are not considered standard.1.3 When the installation or use of thermal insulationmaterials, accessories, and systems may pose safety or healthproblems, the manufacturer shall provide the user appropriatecurrent information regarding any known problems as
5、sociatedwith the recommended use of the companys products and shallalso recommend protective measures to be employed in theirsafe utilization. The user shall establish appropriate safety andhealth practices and determine the applicability of regulatoryrequirements prior to use.2. Referenced Document
6、s2.1 ASTM Standards:2C 168 Terminology Relating to Thermal InsulationC 209 Test Methods for Cellulosic Fiber Insulating BoardC 390 Practice for Sampling and Acceptance of ThermalInsulation LotsC 846 Practice for Application of Cellulosic Fiber Insulat-ing Board for Wall SheathingD 1037 Test Methods
7、for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD 1554 Terminology Relating to Wood-Base Fiber andParticle Panel MaterialsD 2164 Methods of Testing Structural Insulating RoofDeck3E72 Test Methods of Conducting Strength Tests of Panelsfor Building Construction2.2 Federal Stan
8、dard:4900.1 Rev-1 U.S. Dept. of Housing and Urban Develop-ment Minimum Property Standards, One and Two FamilyDwellings43. Terminology3.1 For definitions of terms used in this specification, seeTerminology C 168 and Definitions D 1554.3.2 Definitions of Terms Specific to This Standard:3.2.1 cellulosi
9、c fiber insulating boarda fibrous-felted,homogeneous panel made from ligno-cellulosic fibers (usuallywood or cane) and having a density of less than 31 lb/ft3(497kg/m3) but more than 10 lb/ft3(160 kg/m3).3.2.1.1 DiscussionCellulosic fiber insulating board ischaracterized by an integral bond which is
10、 produced byinterfelting of the fibers, but which has not been consolidatedunder heat and pressure as a separate stage in manufacture.Other materials may be added during manufacture to improvecertain properties.4. Classification4.1 Insulating board covered by this specification consists ofsix types:
11、4.1.1 Type ISound deadening board, for use in wallassemblies to control sound transmissions.4.1.2 Type IIRoof insulation board, for use in variousroofing systems.4.1.2.1 Grade 1Primarily for use under built up roofsystems.4.1.2.2 Grade 2Primarily for use under single-ply roofingsystems.4.1.3 Type II
12、ICeiling tiles and panels.4.1.3.1 Grade 1Nonacoustical, for use as decorative walland ceiling coverings.4.1.3.2 Grade 2Acoustical, for use as decorative, soundabsorbing wall and ceiling coverings.4.1.4 Type IVWall Sheathing.1This specification is under the jurisdiction of ASTM Committee C16 onTherma
13、l Insulation and is the direct responsibility of Subcommittee C16.22 onOrganic and Nonhomogeneous Inorganic Thermal Insulations.Current edition approved Aug. 1, 2008. Published August 2008. Originallyapproved in 1946 . Last previous edition approved in 2001 as C 208 95 (2001).2For referenced ASTM st
14、andards, 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 website.3Withdrawn.4Available from the U.S. Department of Housing and Urban Development,Cons
15、truction Standards Division, HUD Building, Washington, DC 20410.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.4.1 Grade 1Regular, for use as wall sheathing inframe construction.4.1.4.2 Grade 2Structural, for use as wall sheathi
16、ng inframe construction. When installed in accordance with PracticeC 846, structural wall sheathing provides adequate rackingresistance for use as exterior wall bracing.4.1.5 Type VBacker board, for use behind exterior finishin wall assemblies where there are no structural requirements.4.1.6 Type VI
17、Roof deck, for use as roof decking for flat,pitched, or shed-type, open-beamed, ceiling-roof construction.4.2 On occasion these products are used for other applica-tions. The manufacturer and the purchaser shall agree upon anyspecial requirements for such end uses.5. Materials and Manufacture5.1 Cel
18、lulosic fiber insulating board shall be manufacturedfrom refined or partially refined ligno-cellulosic (wood or cane)fibers, by a felting or molding process, into homogeneouspanels. Other ingredients may be added to provide or improvecertain properties such as strength and water resistance, inadditi
19、on to surface finishes for decorative products and specialcoatings which impart resistance to flame spread. The materialis subjected to such drying temperatures as to effect completedestruction of rot producing fungi.5.2 The finished board may be either single or multiple ply.When multiple-ply board
20、s are supplied, a suitable moisture-resistant adhesive shall be used to join the plies.6. Physical Properties6.1 The insulating board shall conform to the physicalproperties in Table 1.6.2 Roof products with a thickness of 112 in., 212 in., orgreater, are post-laminated using thinner board stock who
21、seproperties are covered in Table 1.7. Dimensions, Mass, and Permissible Variations7.1 The materials covered by this specification are availablein the sizes shown in Table 2.7.2 Length and Width TolerancesUnless otherwise speci-fied, the tolerance for length and width of any size panel shallby+0,116
22、 in. per ft ( + 0, 5.2 mm/m), but the totaltolerance in any dimension shall not exceed + 0, 38 in. ( + 0mm, 10 mm).7.3 Thickness ToleranceThe thickness tolerances areshown in Table 3.8. Workmanship, Finish, and Appearance8.1 DefectsThe insulating board shall have no defects thatwill adversely affect
23、 its service qualities. The surface shall befree of cracks, lumps, excessive departure from planeness, orother defects that affect performance or appearance.8.2 Surface FinishThe surface finishes of the board shallbe as specified in Table 2.8.3 Edge DetailsThe edge details of the board shall be assp
24、ecified in Table 2.TABLE 1 Physical Property Requirements for Cellulosic Fiber Insulating BoardPhysicalRequirementsSound DeadeningBoard12 in.(13 mm)thickRoof Insulation BoardGrade 1 Grade 2716 in.(11 mm)thick12 in.(13 mm)thick1in.(25 mm)thick2in.(51 mm)thick12 in.(13 mm)thick1in.(25 mm)thick2in.(51
25、mm)thickThermal conductivity (k), max, 0.38 0.38 0.38 0.38 0.38 0.40 0.40 0.40Btu in./h ft2F (W/mK) at meantemperature of 756 5F (24 6 3C)(0.055) (0.055) (0.055) (0.055) (0.055) (0.058) (0.058) (0.058)Transverse strength either direction,min, lbf (N)12(53.4)7(31.1)7(31.1)14(62.3)28(124.6)12(53.4)24(
26、107)36(160)Tensile strength parallel to surface, min,lbf/in.2(kPa)A150(1034)50(345)50(345)50(345). 150(1034)150(1034).Tensile strength perpendicular tosurface, min, lbf/ft2(kPa)600(28.7)500(23.9)500(23.9)500(23.9)500(23.9)600(28.7)600(28.7)600(28.7)Water absorption by volume, max,% 7 10 10 10 10 7 7
27、 7Linear expansion, 5090 % RH, max,% 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5Flame Spread Index, finish surface,max. . . . . . . .Vapor permeance, grains/hft2in. Hgpressure differential, (mg/sm2kPa) min5(0.287). . . . . . .Modulus of rupture, min, lbf/in.2(kPa) 240(1655)140(965)140(965)80(552)40(276)275(1896
28、)140(965)70(483)Deflection at specified min load, max,in. (mm)0.85(22)1.25(32)1.25(32)0.62(16)0.31(8)0.75(19)0.42(11)0.21(5)Modulus of Elasticity, min, lbf/in.23 103(mPa)B. . . . . . . .Deflection Span Ratio, maxB. . . . . . . .Moisture content by weight, max,% 10 10 10 10 10 10 10 10Racking LoadC,
29、min plf (N/m) . . . . . . . .ATensile strength requirements shall be applicable only on thicknesses up to and including 1 in. (25 mm).BUsing Methods D 2164.CThe specified racking results are as tested in accordance with Test Methods E72when the product is applied vertically and fastened 6 in. (152 m
30、m) apart tointermediate framing and 3 in. (76 mm) apart around the edges of the sheets using Number 11 gage galvanized roofing nails with716 in. head diameters 114 in. long for12 in. and 112 in. for2532 in The panels shall be tightly butted. Nails shall be38 in. from the edges along the center stud
31、and shall be moved to the centerline of otherframing. Alternative installation methods as specified by the manufacturer shall be permitted provided the alternative methods achieve a minimum of 650 plf (9500 N/m).C2080829. Sampling9.1 Unless otherwise specified in the purchase order orcontract, the m
32、aterial shall be sampled in accordance withPractice C 390.10. Test Methods10.1 Unless otherwise specified in Table 1, determine theproperties enumerated in this specification in accordance withTest Methods C 209.11. Inspection and Resubmittal11.1 The following requirements are generally employed for
33、purposes of acceptance sampling of lots or shipments ofqualified material:11.1.1 Surface finish,11.1.2 Edge detail,11.1.3 Dimensional tolerances, and11.1.4 Workmanship.11.2 When agreed upon between the purchaser and themanufacturer or supplier, the inspection of the material shall bemade at either t
34、he point of shipment or point of delivery.11.3 In case of rejection, the manufacturer or supplier shallhave the right to reinspect the rejected shipment and resubmitthe lot after removal of the portion of the shipment notconforming to the specified requirements.12. Product Marking12.1 When specified
35、, each panel or unit shall be labeledwith the manufacturers name or trademark, the designation ofthis specification, and type and grade. The label may alsoinclude the mark of a third party certification organization.13. Keywords13.1 backer board; ceiling tiles and panels; cellulosic fiberinsulating
36、board; decorative insulating board; fiberboard; roofdeck; roof insulation board; sound deadening board; thermalinsulation; wall sheathingTABLE 1 Physical Property Requirements for Cellulosic Fiber Insulating Board (continued)PhysicalRequirementsCeiling Tiles and Panels (BothGrades)A12 in.(13 mm)916
37、in.(14 mm)58 in.(16 mm)Wall SheathingBacker Board716 in.(11 mm)38 in.(9 mm)thickRoof Deck112 in.(38 mm)2in.(51 mm)3in.(76 mm)thickRegular Structural12 in.(13 mm)thick12 in.(13 mm)thick2532 in.(20 mm)thickThermal conductivity (k), max, 0.38 0.40 0.44 0.40 0.40 0.40Btu in./h ft2F (W/mK) at meantempera
38、ture of 756 5F (24 6 3C)(0.055) (0.058) (0.063) (0.058) (0.058) (0.058)Transverse strength either direction,min, lbf (N)10(44.5)14(62.3)20(89.0)25(111.2)6(27).Tensile strength parallel to surface,min, lbf/in.2(kPa)B150(1034)150(1034)200(1379)150(1034)150(1034).Tensile strength perpendicular tosurfac
39、e, min, lbf/ft2(kPa)600(28.7)600(28.7)800(38.3)600(28.7)600(28.7)600(28.7)Water absorption by volume, max,% . 7C7710Linear expansion, 5090 % RH,max,%0.5 0.5 0.6 0.50.50.5Flame Spread Index, finish surface,max200 . . .200Vapor permeance, grains/hft2in. Hgpressure differential, (mg/sm2kPa)min. 5(0.287
40、)5(0.287)5(0.287)5(0.287)DModulus of rupture, min, lbf/in.2(kPa). 275(1896)400(2758)200(1379)200(1379)EDeflection at specified min load,max, in. (mm). 0.75(19)0.75(19)0.56(14)1.18(30).Modulus of Elasticity, min, lbf/in.23 103(mPa)F. . . .40(276)Deflection Span Ratio, maxF. . . . . 1/240Moisture cont
41、ent by weight, max,% 10 10 10 10 10 10Racking LoadG, min plf (N/m) . . 650(500)650(500).APhysical properties listed in this column, except flame spread index, apply to the base material before punching, drilling, perforating, or embossing.BTensile strength requirements shall be applicable only on th
42、icknesses up to and including 1 in. (25 mm).CWater absorption for12 in. structural wall sheathing is determined by the 24-h test in accordance with Test Methods D 1037 using 15 % as the maximum. Waterabsorption for all other products is determined by the 2-h test in accordance with Test Methods C 20
43、9.DFor roof deck products with a vapor retarder, the maximum should be 0.5 (0.029). For roof deck products manufactured without a vapor retarder, there is no requirementfor permeance.EFor roof decking, MOR is determined using Methods D 2164. Matched samples are to be tested before and after accelera
44、ted aging. Minimum MOR for unaged samplesshall be 225 lbf/in.2(155 kPa). For aged samples, the minimum shall be no less than 50 % of the unaged test result.FUsing Methods D 2164.GThe specified racking results are as tested in accordance with Test Methods E72when the product is applied vertically and
45、 fastened 6 in. (152 mm) apart tointermediate framing and 3 in. (76 mm) apart around the edges of the sheets using Number 11 gage galvanized roofing nails with716 in. head diameters 114 in. long for12 in. and 112 in. for2532 in The panels shall be tightly butted. Nails shall be38 in. from the edges
46、along the center stud and shall be moved to the centerline of otherframing. Alternative installation methods as specified by the manufacturer shall be permitted provided the alternative methods achieve a minimum of 650 plf (9500 N/m).C208083ASTM International takes no position respecting the validit
47、y 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 responsibility.This standard is subject
48、 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 to ASTM International Headquarter
49、s. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by
