7. The thermal resistance of an insulating material of a building assembly shall be determined in accordance with ASTM C518-85, Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus or with ASTM C177-85, Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded Hot Plate Apparatus. Tests on non-homogenous panels shall comply with ASTM C236-87, Standard Test Method for Steady-State Thermal Performance of Building Assemblies by Means of a Guarded Hot Box. Tests musts be carried out at an average temperature of 24 ºC (±3 ºC) and under a temperature difference of 22 ºC (±2 ºC). Materials must also be tested after conditioning procedure in accordance with CGSB, CSA or ASTM quality standards, depending on the materials.
O.C. 89-83, s. 7; O.C. 1721-85, s. 3; O.C. 1211-92, s. 1.