1、Designation:C1373/C1373M11(Reapproved 2017)Standard Practice forDetermination of Thermal Resistance of Attic InsulationSystems Under Simulated Winter Conditions1This standard is issued under the fixed designation C1373/C1373M;the number immediately following the designation indicates theyear of orig
2、inal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice presents a laboratory procedure to deter-mine the therma
3、l resistance of attic insulation systems undersimulated steady-state winter conditions.The practice appliesonly to attic insulation systems that face an open attic air space.1.2 The thermal resistance of the insulation is inferred fromcalculations based on measurements on a ceiling systemconsisting
4、of components consistent with the system beingstudied.For example,such a system might consist of a gypsumboard or plywood ceiling,wood ceiling joists,and atticinsulation with its top exposed to an open air space.Thetemperature applied to the gypsum board or plywood shall bein the range of 18 to 24C
5、64 to 75F.The air temperatureabove the insulation shall correspond to winter conditions andranges from 46C to 10C 51 to 50F.The gypsum boardor plywood ceiling shall be sealed to prevent direct airflowbetween the warm and cold sides of the system.1.3 This practice applies to a wide variety of loose-f
6、ill orblanket thermal insulation products including fibrous glass,rock/slag wool,or cellulosic fiber materials;granular typesincluding vermiculite and perlite;pelletized products;and anyother insulation material that is installed pneumatically orpoured in place.The practice considers the effects on
7、heattransfer of structures,specifically the ceiling joists,substrate,for example,gypsum board,air films,and possible facings,films,or other materials that are used in conjunction with theinsulation.1.4 This practice measures the thermal resistance of theattic/ceiling system in which the insulation m
8、aterial has beenpreconditioned according to the material Specifications C549,C665,C739,and C764.1.5 The specimen preparation techniques outlined in thisstandard do not cover the characterization of loose-fill materi-als intended for enclosed applications.1.6 This practice is be used to characterize
9、material behav-ior under controlled steady-state laboratory conditions intendedto simulate actual temperature conditions of use.The practicedoes not simulate forced air flow conditions.1.7 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values st
10、ated 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.1.7.1 All values shall be reported in both SI and inch-poundunits unless specified otherwise by the client
11、.1.8 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 regulatory limitations prior to use.1.9 This internat
12、ional standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committ
13、ee.2.Referenced Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate
14、ApparatusC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC520 Test Methods for Density of Granular Loose FillInsulationsC549 Specification for Perlite Loose Fill Insulation1This practice is under the jurisdiction of ASTM Committee C16 on Ther
15、malInsulation and is the direct responsibility of Subcommittee C16.30 on ThermalMeasurement.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1998.Last previous edition approved in 2011 as C1373/C1373M 11.DOI:10.1520/C1373_C1373M-11R17.2For referenced ASTM standards,visit
16、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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International