Does the R-value of Thermocore panels degrade over time?
A. Independent tests have confirmed time and time again that Thermocore panel R-values remain constant. In fact, Thermocore sends aged panels out to be tested on an annual basis. All of our panels are tested in accordance with ASTM C518 and are done in a laboratory setting. Our most recent test on a panel in excess of three years old confirmed no loss of R-value. Studies at Oak Ridge National Laboratories on various panels made with polyurethane foam cores confirmed no measurable loss of R-value. Polyurethane foam continues to be the product of choice for refrigerators, freezers, water heaters, coolers and many other common household products. If polyurethane lost most of it’s R value why would companies like GE continue to use it?
