Research Report RR:C16-1035
Research Report C16-1035 presents the results of the Interlaboratory Study used to establish the bias for the LTTR test procedure CAN/ULC-S770 Standard Test Method for Determination of Long-Term Thermal Resistance of Closed-Cell Thermal Insulating Foams included in ASTM C1289 Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board. Ten laboratories participated in the study. The bias is defined as the difference between the predicted and measured thermal resistance values of a product. Two manufacturers supplied 1.0, 2.0 and 3.0 inch products. The thermal resistance of these products were measured after 1, 2, 3 and 5 years and compared to the predicted values. It was estimated that the precision of the measurements and the calculation of LTTR values, and hence the bias, were reasonably good. In general, the test procedure over predicts the actual thermal resistance of the products used in this round robin.
C1289-18a Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board
Committee C16 on Thermal Insulation
Subcommittee C16.22 on Organic and Nonhomogeneous Inorganic Thermal Insulations