I had a brand new Timber Line roof put on 14 months ago, they are 30 year shingles and suppose to be 80 mph shingles. I had about six blow off two months ago and now they are tore up again. Shouldn't those singles be sealed down good by now after going the entire summer. Could i have some bad shingles, any body ever had that happen? I bought the best you can get and hoped i would not have any problems for a while![]()