In November 2018, Brandon Rakestraw of Coryell Roofing provided me with an estimate to replace a 12,000 sq ft commercial roof. The Duro-Last White Membrane 50 mil roof was installed right over the existing roof. He walked me through the whole process, insurance adjuster, engineers, and anything else that was required. The new roof was installed the week between Christmas and New Years in December 2018 with the installers working in the bitter cold. The installing crew was very good. Coryell and the crew left the premises clean and tidy. From start to finish everything was done in a professional manner. I would highly recommend Coryell Roofing. The new roof is great!