Denver, Colorado (6/14/2002) --- Johns Manville Roofing Systems will adopt an advanced, scientifically supported methodology called Long Term Thermal Resistance (LTTR) to accurately predict the long-term R-Value performance of polyisocyanurate insulation. This new standard, which applies to all permeably faced foam insulation with blowing agents other than air, provides a technically supported, more descriptive measure of the Long-Term Thermal Resistance of polyiso insulation--a 15-year time-weighted average.
"We are pleased that the Polyisocyanurate Insulation Manufacturer's Association (PIMA) and industry leaders have joined together to adopt this new standard that provides specifiers with the information they need to accurately predict long term R-value performance of the insulation," said Joe Smith, Market Manager for Insulation at JM.
The method used to determine long-term R-values is based on accelerated aging by conditioning thin slices of foam insulation and is based on consensus standards in both the United States and Canada. On July 1, 2002 JM and other manufacturers will discontinue publishing figures from the PIMA 101 standard in Canada. The date for the elimination of PIMA 101 numbers in the United States is January 1, 2003.
Johns Manville, a Berkshire Hathaway company, is a leading manufacturer and marketer of premium-quality building and specialty products. In business since 1858, the Denver-based company has sales in excess of $2 billion and holds leadership positions in all of the key markets that it serves. Johns Manville employs approximately 9,500 people and operates 52 manufacturing facilities in North America, Europe and China. Additional information can be found at
www.jm.com.
