Obviously, repairing is going to be more affordable to a homeowner than replacing. Most homeowners would rather just patch up leaks, and move on with their lives, but if your roof is already showing signs of wear, the problem is only likely to get worse. You also need to take into account whether or not you'll be keeping your home for much longer. If you choose to replace just a few shingles due to targeted weather damage, then it's likely that the roof will be two different colors, and may make it more difficult to sell — it's a tell-tale sign to prospective buyers that the house may need some work. Roofing repair prices vary from contractor to contractor, but it may not even be all that much cheaper to repair than replace. For example, to repair one side may be close to several thousand dollars, where you would get a price discount if you did the full replacement. If one part of your roof needs repairing, it's a good sign that it may be time to just get the whole thing replaced. No roof is meant to last a lifetime, and your home roof can only be expected to last for so many years.