Hi All, My home is only 9 years old and I have a lot of curling, rotting, and blistering going on. It's a BP Citadel 20 yr shingle. Four roofing companies who looked at my roof call it "pre mature shingle deteriation." First warranty claim was denied of course, now under 2nd claim review after I paid an inspector to write a letter to BP. They will probably deny again. I don't know how pre-mature shingle deteriation is not a manufacturer's defect. Ridiculous! I am seeking help from all parties who are interested in... read full review »