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    ASTM C209 - 20

    Standard Test Methods for Cellulosic Fiber Insulating Board

    Active Standard ASTM C209 | Developed by Subcommittee: C16.32

    Book of Standards Volume: 04.06

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    Significance and Use

    4.1 The test methods contained in this document are intended for cellulosic fiber insulating board as described in Specification C208. These test methods examine mechanical, physical and thermal properties, properties related to water absorption and water vapor exposure, and flammability related properties.

    4.2 The results of these tests are suitable to describe the performance of insulating board and are also suitable for use in material specifications.

    Note 1: Committee C-16 is in the process of splitting this document into discrete test methods categorized by the nature of the test methods.

    1. Scope

    1.1 These test methods cover those insulation products in specified Specification C208. The requirements for the products’ physical properties are specified in Specification C208. The methods for the general insulation products’ physical properties are given as follows:





    Size of Finished Board


    Thermal Conductivity


    Transverse Strength


    Deflection at Specified Minimum Load


    Tensile Strength Parallel to Surface


    Tensile Strength Perpendicular to Surface


    Water Absorption


    Linear Expansion


    Water Vapor Transmission


    Flame Spread Index


    Moisture Content and Density


    Compressive Strength


    1.2 Reference is provided to an established source for nomenclature and definitions.

    1.3 Several of the test methods contained in this document are referenced by material specifications other than cellulosic fiber insulating board. These include mineral fiber, perlite, polyisocyanurate, polystyrene and phenolic materials.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C165 Test Method for Measuring Compressive Properties of Thermal Insulations

    C168 Terminology Relating to Thermal Insulation

    C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus

    C208 Specification for Cellulosic Fiber Insulating Board

    C303 Test Method for Dimensions and Density of Preformed Block and BoardType Thermal Insulation

    C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

    C870 Practice for Conditioning of Thermal Insulating Materials

    C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions

    C1114 Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus

    C1616 Test Method for Determining the Moisture Content of Organic and Inorganic Insulation Materials by Weight

    C1763 Test Method for Water Absorption by Immersion of Thermal Insulation Materials

    D1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials

    D1554 Terminology Relating to Wood-Base Fiber and Particle Panel Materials

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E96/E96M Test Methods for Water Vapor Transmission of Materials

    ICS Code

    ICS Number Code 27.220 (Heat recovery. Thermal insulation)

    UNSPSC Code

    UNSPSC Code 30141500(Thermal insulation)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C0209-20

    Citation Format

    ASTM C209-20, Standard Test Methods for Cellulosic Fiber Insulating Board, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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