I installed an Owens Corning HP Weatherguard, 40 year roof, with the intent of retiring and be secure from that expense going forward. Now, as I prepare to retire, I find the roof actually lasted 12 years in a non-severe climate. My neighbor has a 25 year old roof and a 30 year shingle, and is laughing at my decision to buy high quality OC product. OC offered to give me a credit on the same shingles worth 22% of the cost of a new roof. So they produce a defective product, it lasts 30% of the expected life, and leave me and my wife (retired with little money) to pay 80% of the cost to replace their poor quality product. I don't understand how a company can have such poor business ethics and leave the home owner subsidizing their business.