R-Value Declaration for Insulation Materials with Kingspan AS/NZS 4859.1:2018 Material R-Value Declaration Procedure The new National Construction Code (NCC) introduced an updated version of the Australian insulation standard 4859.1. The updated AS/NZS 4859.1:2018 requires a statistical assessment of at least 10 test results for each material assessed under the standard. This statistical assessment determines the R-value and thermal conductivity for the products tested from the statistically adjusted mean values representing a 50% fractile with 90% confidence for a one-sided tolerance interval. To be sure the insulation product you are specifying or using is NCC 2019 compliant, remember to ask the manufacturers about their material R-value declaration procedure. We have prepared a handy guide that outlines what questions you need to be asking, how the products are aged and tested, and what goes into a Thermal Value Summary Report. 
Click here to download the AS/NZS 4859.1:2018 Material R-Value Declaration Procedure Guide.
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