A core component of the value proposition delivered by a reputable metal roof contractor is a robust and comprehensive warranty package that includes two separate, yet intertwined, guarantees: the manufacturer's warranty covering material defects (often 30-50 years, or even limited lifetime) and the contractor's workmanship warranty covering installation errors (typically 5 to 15 year... https://kkroofspecialist.com.sg/metal-roof-contractor/