A minor roof repair might be as simple as swapping a few cracked shingles or sealing a small leak around a vent pipe, often a manageable DIY project costing under a few hundred dollars. A major roof repair involves structural issues, widespread water damage, or replacing large sections of the roof deck—usually requiring professional contractors, permits, and thousands of dollars. Knowing the difference can save you from overpaying or ignoring a problem until it becomes an emergency. minor vs major roof repair 13