Thanks for the response / input. The problem is that A) I don't have the bag that the shingles came in (since they were installed in '93, I bought the home in '03, & original owner did not leave bag / extra shingles behind), & B) GP's denial of my claim included a copy of the "Limited Warranty," & ALL it says on the subject is, "Warranty Limitations...include...inadequate attic ventilation..."
As I mentioned in my previous post -- Feb 1, 2010 -- GP's denial of my claim states, "...it is [GP's] opinion that your ventilation is not properly balanced and additional upper ventilation may be necessary..."
Is that all that's required of them to deny my claim? Opinion? Where is proper balancing defined? MAY be necessary?
No, It sounds like their test showed excessive heat damage, venting codes vary State to State. You can further demonstrate by asking to meet with a GP rep. Have your attic confirmed by an HVAC co. before you meet.