http://hometeamaz.net/1/iRoofing/if%20old%20roof%20leaks%20were%20not%20properly%20repaired%20the%20first%20time,%20the%20same%20issue%20can%20return%20with%20more%20severity%20-%20all%20damaged%20layers%20need%20to%20be%20replaced.jpg