The following list summarises the main standards documents relating to the measurement of thermal conductivity of construction materials, refractories and plastics. Standards may of course be changed or updated over time so for the latest information visit the BSI or ASTM web sites:

British Standards Institute (BSI)
ISO 8302- Thermal Insulation. Determination of Steady-State Thermal Resistance and Related Properties. Guarded Hot Plate Apparatus.

ISO 8301 - Thermal Insulation. Determination of Steady-State Thermal Resistance and Related Properties. Heat Flow Meter Method

BS EN 12664* - Thermal Performance of Building Materials and Products. Determination of Thermal Resistance by means of Guarded Hot Plate and Heat Flow Meter Methods. Dry and Moist Products of Medium and Low Thermal Resistance.

BS EN 12667* - Thermal Performance of Building Materials and Products. Determination of Thermal Resistance by means of Guarded Hot Plate and Heat Flow Meter Methods. Products of High and Medium Thermal Resistance.

BS EN 12939* - Thermal Performance of Building Materials and Products. Determination of Thermal Resistance by means of Guarded Hot Plate and Heat Flow Meter Methods. Thick Products of High and Medium Thermal Resistance.

ISO 8894 - Refractory Materials - Determination of Thermal Conductivity - Hot-Wire Method.

BS EN 993-14 - Methods of Test for Dense Shaped Refractory Products. Determination of Thermal Conductivity by the Hot-Wire (Cross-Array) Method.

BS EN 993-15 - Methods of Test for Dense Shaped Refractory Products. Determination of Thermal Conductivity by the Hot-Wire (Parallel) Method.

For further detail or to purchase these standard documents contact British Standards Institute at: http://www.bsi-global.com/.

Note: Users may also come across the following two old British standards. These have been withdrawn and replaced by the three standards above identified with an asterisk*.

BS 874-2.1 - Methods for Determining Thermal Insulating Properties. Tests for Thermal Conductivity and Related Properties. Guarded Hot-Plate Method.

BS 874-2.2 - Methods for Determining Thermal Insulating Properties. Tests for Thermal Conductivity and Related Properties. Unguarded Hot-Plate Method.

American Society for Testing and Materials (ASTM)

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

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

E1530 - Standard Test Method for Evaluating the Resistance to Thermal Transmission of Materials by the Guarded Heat Flow Meter Technique.

E1225 - Standard Test Method for Thermal Conductivity of Solids By Means of the Guarded-Comparative-Longitudinal Heat Flow Technique.

D5930 - Standard Test Method for Thermal Conductivity of Plastics by means of a Transient Line-Source Technique.

C1113 - Standard Test Method for Thermal Conductivity of Refractories by Hot Wire (Platinum Resistance Thermometer Technique).

C201 - Standard Test Method for Thermal Conductivity of Refractories.

For further details or to purchase these standard documents, please contact ASTM International.

Details of Thermal Measurement Services can be found at Thermal Performance.