b'90 out of 100 roofingprofessionals chose the very best . With nearly 1 contractors, specifiers, consultants and other roofing professionals welding and evaluating four TPO membranes in blind challenges, ,000 JM TPO was chosen as the best overall membrane 70% of the time. Among those professionals who are knowledgeable and experienced enough to correctly identify the manufacturers represented, 90 out of 100 of these experts chose JM TPO as the best.'