Factory certified roofers are your best insurance to having a good roof in residential re roofing. GAF has an entry level into their program known  as GAF Certified where extended warranties against shingle defects are available.  The highest level of certification for GAF is the Master Elite Contractor program of which less than 10% of roofing contractors qualify for.  CertainTeed has their own programs similar to GAF known as the Shingle Master and the Select Shingle Master program.  Out of over 200 roofing companies in central North Carolina, Consolidated Roofing Systems is 1 of only 5 roofing contractors that have the highest level of certifications held in the roofing industry serving the Raleigh, Durham and surrounding Triangle area markets.  Not only does CRS offer factory backed non pro-rated material warranties but also offers a 25 year factory backed workmanship warranty as well.  Call Consolidated Roofing Systems today for a free estimate and to learn more about their industry leading warranties.