I have been roofing for more than 20 yrs now, these singles were bought at Lowes building supply, the type were owens corning, well the shingles didn't stick, I contacted the company they said send me a sample of the singles, and pictures, well they send after a month and a half of waiting for some response we get a copy of the letter they sent to the customer my company roofed for him, telling him that it's my fault, with their fancy letter saying about how they should be nailed and so forth, I have never had a complaint from my other customers, anyway now I had to buy some more shingles and nails out of my pocket to make sure I redo his roof to please the customer, I believe if they would have stand behind their product I would not have to redo and pay out of my pocket for new shingles, and I didn't use that company I went with another, I will never buy shingles from that company again, they will use fancy letters to shut you up and they will get out of it. It's a big corporation there could have been a portion not done right, and for some reason we got the short end of the stick, this customer now don't believe that my work is not good, my reputation of a small business like mine can't afford to loose a little bit or a lot because of shingles that don't stick, they will try to blame you and not take responsibilities of their product... well I hope you can do business with them I know I won't.