Hi All, I purchased a house approx 2 years ago as an investment property. There is an area of the roof which is fairly flat pitch roof which causes leaks inside the house. Realestate already repaired the roof once but the leak is back again. Another roof repairer has advised that the leak will continue until this part of the roof is converted to colorbond so the water can escape correctly which makes some sense. So given the roof is old and I don't want to keep getting these $1000 repairs on an old roof, should I replace the entire roof with colorbond or just repair the section which keeps leaking with colorbond? What's the pros/cons of doing this?