1、Designation: C 208 08aStandard 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 par
2、entheses 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
3、board 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 un
4、its 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 a
5、ssociatedwith 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 Documen
6、ts2.1 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 Sta
8、ndard: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 cellulos
9、ic 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 i
10、s 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, andmodified bitumen roof systems.4.1.2.2 Grade 2Primarily for use under single-ply, buil
12、t-up, and modified bitumen roofing systems.4.1.3 Type IIICeiling 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
13、is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C16.22 onOrganic and Nonhomogeneous Inorganic Thermal Insulations.Current edition approved Dec. 1, 2008. Published December 2008. Originallyapproved in 1946 . Last previous edition a
14、pproved in 2008 as C 208 081.2For 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 website.3Withdrawn. The last approved ve
15、rsion of this historical standard is referencedon www.astm.org.4Available from the U.S. Department of Housing and Urban Development,Construction Standards Division, HUD Building, Washington, DC 20410.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
16、 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 sheathing inframe construction. When installed in accordance with PracticeC 846, structural wall sheathing provides adequate rackingresistance for use as exterior wall bra
17、cing.4.1.5 Type VBacker board, for use behind exterior finishin wall assemblies where there are no structural requirements.4.1.6 Type VIRoof 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-
18、tions. The manufacturer and the purchaser shall agree upon anyspecial requirements for such end uses.5. Materials and Manufacture5.1 Cellulosic fiber insulating board shall be manufacturedfrom refined or partially refined ligno-cellulosic (wood or cane)fibers, by a felting or molding process, into h
19、omogeneouspanels. Other ingredients may be added to provide or improvecertain properties such as strength and water resistance, inaddition to surface finishes for decorative products and specialcoatings which impart resistance to flame spread. The materialis subjected to such drying temperatures as
20、to effect completedestruction of rot producing fungi.5.2 The finished board may be either single or multiple ply.When multiple-ply boards 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 physicalp
21、roperties in Table 1.6.2 Roof products with a thickness of 112 in., 212 in., orgreater, are post-laminated using thinner board stock whoseproperties are covered in Table 1.7. Dimensions, Mass, and Permissible Variations7.1 The materials covered by this specification are availablein the sizes shown i
22、n Table 2.7.2 Length and Width TolerancesUnless otherwise speci-fied, the tolerance for length and width of any size panel shallby+0,116 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 a
23、reshown in Table 3.8. Workmanship, Finish, and Appearance8.1 DefectsThe insulating board shall have no defects thatwill adversely affect its service qualities. The surface shall befree of cracks, lumps, excessive departure from planeness, orother defects that affect performance or appearance.8.2 Sur
24、face FinishThe surface finishes of the board shallbe as specified in Table 2.8.3 Edge DetailsThe edge details of the board shall be asspecified in Table 2.9. Sampling9.1 Unless otherwise specified in the purchase order orcontract, the material shall be sampled in accordance withPractice C 390.TABLE
25、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 mm)thickThermal conductiv
26、ity (k), max, 0.38 0.38 0.38 0.38 0.38 0.50 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) (0.072) (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(107)36(160)Tensile streng
27、th parallel to surface, min,lbf/in.2(kPa)B150(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 7Linear expansion, 5090
28、% 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)140(965)70(483)Deflectio
29、n 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)F. . . . . . . .Deflection Span Ratio, maxF. . . . . . . .Moisture content by weight, max,% 10 10 10 10 10 10 10 10Racking LoadG, min plf (N/m) . . . . . .
30、 . .C 208 08a210. 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 forpurposes of acceptance sampling of lots or s
31、hipments 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 the point of shipment or point of delivery.11
32、.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, each panel or unit shall be labeledwith th
33、e 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 board; decorative insulating board; fiberboa
34、rd; 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 in.(14 mm)58 in.(16 mm)Wall SheathingBacker
35、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 meantemperature of 756 5F (24 6 3C)(0.055) (0.058) (0.0
36、63) (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 tosurface, min, lbf/ft2(kPa)600(28.7)600(28.7)800(38
37、.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)5(0.287)5(0.287)5(0.287)DModulus of rupture
38、, 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 content by weight, max,% 10 10 10 10 10 10Rackin
39、g 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 thicknesses up to and including 1 in. (25 mm).
40、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 209.DFor roof deck products with a vapor retar
41、der, 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 accelerated aging. Minimum MOR for unaged samplessha
42、ll 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 fastened 6 in. (152 mm) apart tointermediat
43、e 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 and shall be moved to
44、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).C 208 08a3ASTM International takes no position respecting the validity of any patent rights asserted in connec
45、tion 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 to revision at any time by the responsib
46、le 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 Headquarters. Your comments will receive careful con
47、sideration 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
48、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 contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM web
49、site(www.astm.org).TABLE 2 Nominal Dimensions of Cellulosic Fiber Insulating BoardNominal DimensionsSurface Finish Edge DetailsWidthin. (mm)Lengthin. (mm)Thicknessin. (mm)Sound Deadening Board 48 (1219)48 (1219)96 (2438)108 (2743)12 (13)12 (13)naturalAsquareRoof Insulation 23 (584) 47 (1194)12 (13), 1 (25), 112 (38)2 (51), 212 (64), 3 (76)naturalAor factory surfaceBsquare, offset, or shiplappedGrade 1 and Grade 2 24 (610) 48 (1219)12 (13), 1 (25), 112 (38)2 (51), 212 (64), 3 (76)48 (1219) 48 (1
