I’ve seen other freeze-thaw results that were published by XPS manufacturers with substantially different results. Are these incorrect?
You’re likely talking about a foam-insulation comparison that was done using ASTM C 666 Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing. As the title indicates, the test method was designed for concrete and not foam insulations. Furthermore, as stated within the actual test method, it was not intended to “provide a quantitative measure of the length of service that may be expected from a specific type of concrete,” let alone foam insulations, but is intended for “determining the effects of variations in the properties of concrete on the resistance of the concrete to the freezing-and-thawing cycles specified in the particular procedure.” To use ASTM C 666 for foam insulation is not only incorrect but also misleading. ASTM C1512 Standard Test Method for Characterizing the Effect of Exposure Environmental Cycling on Thermal Performance of Insulation Products was developed specifically for foam thermal insulations and attempts to replicate a real-world environ
