Are you experiencing hot and cold spots in your house when it should just be one or the other? Are you over spending on bills when you should be spending a fraction of what they are now? What's happening with the moisture in the attic? You might want to look into spray foam insulation.
Spray foam insulation is far better than fiber glass insulation because it is seamless, gets into every crevice and is water tight. It may be a little bit more expensive but it lasts for an entire lifetime. To have this installed in your roof you will most likely need to have a service come and do it for you.
Spray foam installation services can be made by appointment. They will come and inspect your entire roof, diagnose any problems you might have and after fixing the problems they will spray the entire interior of your roof with spray foam insulation. If there are problems with your roof like rotting or leaking this could cause the entire roof to cave in so that is a separate issue that is going to need attention before you can add spray foam to your situation.
You will not need to worry about spray foam weighing down your roof. It is a very light substance that even when it is sprayed on thick, isn't very heavy at all. It is a foam that dries right onto the roof and keeps all of the leaky problems at bay.
The foam also keeps out all of the sound pollution that you might be experiencing from the neighborhood. The foam dampens the sound on the inside and muffles the sound on the outside for a much quieter calmer way of living. You won't have to deal with annoying yelling neighbors or dogs barking. Everything will just be kept at a much quieter level for your enjoyment.