In many cases, it is possible to patch a roof rather than replace the entire roofing system. However, when the damage is severe or the roof past its life expectancy, it’s better to replace the roof rather than patch a small area.
Roof patching should be reserved for minor damage, such as when the roof is punctured or missing a shingle. In this case, patching the roof will save you money, alleviate the problem, and prevent further damage from occurring.