PIMA announces LTTR value to be measured and reported starting 2014

Since its founding, the Polyiso Insulation Manufacturers Association (PIMA) has been very active in the harmonization of relevant standards, including ASTM and CAN/ULC, in an effort to provide greater continuity in the reporting of polyiso roof insulation thermal values throughout North America. In fact, the association implemented the industry-wide QualityMarkCM certified R-value program for rigid polyiso roof insulation in 2004, to insure accurate and reliable reporting of insulation thermal properties.

Earlier this year, the primary product standard for polyiso insulation (ASTM C-1289-11) was revised to include the most recent versions of both ASTM (ASTM C-1303-11) and CAN/ULC (CAN/ULC-S770-09), test methods to measure Long-Term Thermal Resistance (LTTR). Prior to the development of the latest version of ASTM product standard for polyiso, LTTR testing and reporting was based on a single test method (CAN/ULC-S770-03) identified in the previous version of the ASTM product standard (ASTM C-1289-08).