ASTM C209-07a - 1.5.2007
 
1. Scope

1.1 These test methods cover those insulation products in specified Specification C 208 that are not singularly specified elsewhere as insulating formboard (see Specification C 532) and nail-base sheathing (see Specification D 2277). The requirements for the products' physical properties are specified in Specification C 208. The methods for the general insulation products' physical properties are given as follows:
Section
Thickness7
Size of Finished Board8
Thermal Conductivity9
Transverse Strength10
Deflection at Specified Minimum Load 11
Tensile Strength Parallel to Surface 12
Tensile Strength Perpendicular to Surface 13
Water Absorption14
Linear Expansion 15
Water Vapor Transmission16
Flame Spread Index17
Moisture Content and Density18

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

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 and health practices and determine the applicability of regulatory limitations prior to use.

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.

 
2. Referenced Documents

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E96/E96M-24a

Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials (Includes all amendments and changes 11/20/2024).

E84-26a

Standard Test Method for Surface Burning Characteristics of Building Materials (Includes all amendments and changes 4/15/2026).

D1037-12(2020)

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

C1114-06(2019)

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

C518-21

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

E177-26a

Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods (Includes all amendments and changes 5/14/2026).

C177-19(2026)

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

C168-25

Standard Terminology Relating to Thermal Insulation

D1554-10(2023)

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

C1045-19(2026)

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

C165-23

Standard Test Method for Measuring Compressive Properties of Thermal Insulations

C870-24

Standard Practice for Conditioning of Thermal Insulating Materials

C208-22

Standard Specification for Cellulosic Fiber Insulating Board