The warranty provided by a metal-roof-contractor should cover both the materials and the workmanship. Most manufacturers offer 40-year to 50-year warranties on the finish of the metal panels. A reputable metal-roof-contractor will supplement this with a multi-year labor guarantee. This ensures that if any installation errors occur, they will be fixed at no cost to the owner. Reviewing... https://kkroofspecialist.com.sg/metal-roof-contractor/