If it helps you to have a better perspective on things, then just remember that once the roof is on, the new one, then it's more or less too late to undo any mistakes. It's almost like you cannot learn too much and the reason is compelling. There are some unusual situations in which you can seriously be compromised in many ways. This may involve finances and other legal issues if there are any problems or worker injuries.
It's not always best to buy the least expensive shingles because you really do get what you pay for. Unless you have money, you must establish proper planning with regard to what you can afford. All potential contractors for doing the job need to be interviewed and have them bid on the job. Just choosing a different type of shingle can actually double the cost, so that should alert you about why you need to know something.
All US states have regulations in place that are designed to help you and protect you with choosing a contractor. Naturally you want someone who knows what he's doing and has a positive reputation in your community and in the local industry. Find out all the relevant state offices that have information you can use to confirm and/or verify your contractor is doing things right, etc. There really is an office for contractor oversight, and so just think what you can learn from calling or visiting them - this is the effort you would be wise to take.
If your house is old, then the one thing that could happen is the roof will sag. The best thing to do is not let this go because it will only get worse and cause more issues. You can even go into your attic and take a look at the wooden beams, and you'll be able to see those that are bending. So you have been around long enough to know that ignoring a roof problem such as sagging and bending is not something you want to let go on indefinitely. While it's great to think you can trust any roofing contractor for your new roof, that's not the case at all. Just go online and do some reading about this, and you'll come across some pretty bad stories.
Roof Restorations Melbourne
37 Como Street
Alphington VIC 3078
(03) 8657 0141