ASTMC1859-17isastandardpracticedevelopedbyASTMInternationalthatprovidesguidelinesfordeterminingthethermalresistance(R-value)ofloose-fillbuildinginsulationmaterialswheninstalledinsidewallapplications.Thisstandardoutlinestheproceduresforpreparingtestspecimens,conductingmeasurements,andcalculatingthethermalresistanceunderspecificconditions.Itisintendedforusebymanufacturers,testinglaboratories,andregulatorybodiestoensureconsistentandaccurateevaluationofinsulationperformance.Thestandardhelpsinassessingtheeffectivenessofloose-fillinsulationinreducingheattransferthroughbuildingwalls,contributingtoenergyefficiencyandcompliancewithbuildingcodes.ASTMC1859-17ispartofaseriesofstandardsaimedatimprovingthethermalperformanceofbuildingmaterials.
