This is a question or something I hear too often. The number of times we come across a scenario where a new home owner moves into their new home only to find out the previous owners did not hire a professional roofer (Milton Roofing Pros), but did it themselves. It's actually heart breaking for us to have to relay this to the home owner that such an expensive and integral part of a home has failed and must be redone. Out of the hundreds of homes we look at annually, this happens at least a dozen or more times throughout the year. This is a buyer beware that I am giving you right now. One thing to recommend to save yourself from running into this issue, would be to have a professional roofing contractor come inspect the home you are looking to purchase before you finalize anything.
Another thing I see/hear a lot of times are home owners doing their own roofing repairs instead of calling Milton Roofing Pros to address any issues. I hear it more then often of a severe or fatal incident of a local resident who he/she was doing a roofing repair or service that they have fallen off a roof. Roofing should be done by professionals because it is their environment.
I'm not saying there is no home owner out there that is capable of doing their own roof, but its not for everyone. Roofing is labour intensive job that comes with lots of risks. Play it safe and let the experienced roofing specialist at Milton Roofing Pros do the risk taking for you.