Owens-Corning Fiberglass

I have a roof that is 2 1/2 years old. It has a 25 year warranty. I have shingles that are blistering. Most shingles are installed over the flashing. Owens Corning has a process that they require for any complaints/claims. The process is so restrictive it is like they do not want you to file a claim. I did everything that was required. Their response was that the contractor put too much adhesive on the bottom of the shingle. I can't believe that is the problem. If it is the cause, Owens Corning has not done enough testing of the reaction of the adhesive on the shingle. Personally I want as much adhesive so I don't have any issue with the wind blowing shingles off the roof. Owens Corning does not stand by their warranty on their product.
Do not buy Owens Corning products.