PIMA announced that four accredited testing labs have been approved for use by participating polyiso insulation manufacturers in its QualityMark program, the only third-party program for…
Browsing: LTTR
The North American Insulation Manufacturers Association (NAIMA) celebrates its 80th anniversary this week. Since 1933, NAIMA and its predecessor associations have had as their foundation a…
Johns Manville (JM), a supplier of commercial roofing products, advises customers of revised LTTR (Long-Term Thermal Resistance) values for its polyisocyanurate insulation product line. To help…
The ASTM C1289 Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board (ASTM C1289-11) has been updated and features important improvements regarding the prediction of…