Johns Manville’s DuraBase®, an underlayment product for residential roofing, is now available in the West from the company’s manufacturing facility in Oklahoma. DuraBase combines the proven technology of asphalt with new non-woven polyester mat. It comes in a four square, 36-inch wide roll that weighs approximately 40 pounds. DuraBase offers easy installation and maximum performance, slip resistance, lighter weight and excellent durability. Additional information can be found at