Have you filed a claim with your shingle manufacturer. Currently, I have a claim with my shingle manufacturer. My home was only 3 years old when I had hole shingles blown off my roof in areas as large as l5 ft x l5 ft. I filed the claim with them only to have them turn my claim down due to the fact that they said installation was the problem and also they were not guaranteed to withstand hurricane force winds. The shingles blew off in January, by the way, which is not usually considered hurricane season. Which is pure baloney!!! I have had 8 roofers look at the roof and each one says the shingles are not sealed. I can even lean out my upstairs window and lift them with my fingers easily. This is the third claim I know of against Owens Corning shingles. My boss filed a lawsuit and they quickly settled his out of court. Hope my is too. Just wondered what type shingles you had.