I am in the process of getting estimates to re-roof our 14 year old
home. We live in the Southeastern US and have asphalt shingles, but
they are severely worn out and starting to crack. My question is
regarding ridge vents. None of the homes in our sub have them. I
imagine that is one reason why the roof has failed prematurely. Can
ridge vents be added when re-roofing, or must the whole thing be torn
off first? Thanks for any advice you can give.