If you have ever shopped for asphalt shingles for your roof, you will have noticed that there are many brands and varieties available. What makes some shingles more expensive than others? Why do some shingles come with a much longer warranty than others? Some asphalt shingles available on the market are higher quality than others. The length of the manufacturer’s warranty is not necessarily the best indication of the best quality shingles. One reason for this is that cert