R-value (insulation) contain no trapped CFCs or HFCs (e.g., half-pound low density foams). On certain brands, twenty-year tests have shown no shrinkage or reduction in insulating value. This has led to controversy as how to rate the insulation of these products. Many manufacturers will rate the R-value at the time of manufacture; critics argue that a more fair assessment would be its settled value. The foam industry adopted the LTTR (Long-Term Thermal Resistance) method, which rates the R-value based on a 15-year weighted average. However, the LTTR effectively provides only an eight-year aged R-value, short in the scale of a building that
The Measure of a Man: A Spiritual Autobiography The Measure of a Man: A Spiritual Autobiography The Measure of a Man: A Spiritual Autobiography is an autobiographical work by Sidney Poitier. On January 26, 2007, Oprah Winfrey chose it for her book club. In this memoir, Poitier, looks back on his celebrated life and career. He explores elements of character and personal values to take his own measure as a man, as a husband and a father, and as an actor. Poitier credits his parents and his childhood on tiny Cat Island in the Bahamas for equipping him with the unflinching sense of right and wrong and of