I have a client in Minneapolis that has huge problems with his insurance company. He had roof raked my roof during several bad winter months (fearing ice damming) and his shingles curled. The insurance company will cover the problem, but the adjusters are saying that they are bad shingles. The only spot they are curling is where he roof raked, all others are laying flat (how can that happen??). His claim is for curling shingles, but the adjuster is saying they were produced by certainteed and would not cover the problem. Any advise!!!!!