The worst of the mistakes that most residential owners keep doing is that they wait for problems to become huge ones so that they can be assured that things are not fine so that they get the job done. It is not advisable to wait for an issue to grow too much to seek for the repair services including your roof. Asking for roof replacement or repair is important and needs to be done before things fall apart completely. The more repairs you have for your roof, the more expensive the charges seem to be. You could be wishing that an inspection a repairer says that everything is fine which is what everyone wants but the bad news will always show up without your expectation.
You are supposed to hire a contractor who will do thorough research for the possible problems that have to be repaired. If there is an issue, then an expert is going to notice it for you. You are the one who could end up in the wrong way of missing things when you do not know that some issues exist, but an expert will be able to identify them. In a year, you need to have an inspection contractor providing the service on your behalf. Experts will always know where to look.
The shingles which have been destroyed will entail that there is an issue too. It si important that you always look at the type of shingles you have their conditions. Some issues you have to look for are as follows; curling edges or corners, missing or cracked. Look out for sins of impending repairs like they have been mentioned for you above. With so many problems on your roof, you just might need to forget about repairs because that is beyond what repair can solve, but replacement can do the math. As long as the repairs are not enough, then you can have the same issues repeating themselves.
If you can see anything like a sagging roof deck, then this is the way out and how you need to do it. You should see your roof looking somehow straight even if it is supposed to look a little bit bent. There must be a problem with the roofing when you see that some parts of it are sagging or warping. Either, the roof was poorly installed, or there is too much water not flowing down as it should. The most important thing when you realize any of the issues mentioned above is have the matter repaired or replaced when it is still early.