There are two warranty’s to consider when purchasing a roof installation.  A material defect warranty and a labor warranty against leaks.  The manufacturers carry the material defect warranty and they range from a limited 25 years up to a limited 50 years.  The products and processes incorporated into the roofing system will “define limited”.  The workmanship warranty against leaks will range from 1 year up to 25 years.  Our typical roof replacement with a GAF or Owens Corning composition shingle will carry between a 10 year and 25 year workmanship warranty backed by the manufacturer.   All of the warranty coverages are determined by clients choices in product and processes.  The more you incorporate, the longer the warranty.