b'Table 2 Measured Results Calibration check17-Jun-19, SR 18 BRANZ referenceD6218 Sample weightgram475 grams per sq. metreg/m 2 1319.4 Test date17-Jun Test thicknessmm98.6 Densitykg/m 3 13.4 Temperature differenceK26.0 Mean temperatureC23.0 Heat-fluxW/m 2 10.52 Thermal resistancem 2 K/W2.47 Thermal conductivityW/mK0.0399 Difference between heat flux transducers%0.2 Some foam insulation materials such as phenolic, polyurethane, polyisocyanate and extruded polystyrene can exhibit the characteristic of aging of the material, the thermal conductivity increasingwithtime.Sincetheprevioushistoryofthetestmaterialisunknownandno accelerated aging has been performed, these results should without further information be considered as representative of the performance of new material only and actual longer-term in-service thermal conductivity may be higher. The best expanded uncertainty of measurement (3%) is only achieved with heterogeneous material with R-value greater than 0.1 m 2 K/W when the percentage difference between the heatflux transducers readings is less than 5%. If the difference is greater than 5% then the uncertainty in the measurements of thermal resistance and conductivity will be greater than 3%. 7.REFERENCES ASTM C518Standard Test Method for Steady-State Heat Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.American Society for Testing and Materials, Philadelphia, PA, 2017 REPORT NUMBER:ISSUE DATE:PAGE:DI11689-001-0118 June 20195 of 5 branz.nz | 1222 Moonshine Rd, RD1, Porirua 5381, Private Bag 50 908, Porirua 5240, New ZealandPhone +64 4237 1170branz@branz.co.nz'