The majority of residential roofs are protected by asphalt shingles, and their warranty lengths are represented in their descriptions. The most typical types of asphalt shingles are 25 year (3-tab shingles), and 30 year architectural shingles. There are also 40 year and lifetime shingles available. It is easy to assume that a 30 year roof has a 30 year warranty, but with most standard warranties that is misleading. Your standard shingle warranty protects against manufacturer defects to the shingles only. This does not include labor to replace the defective product, or any other accessories that must be reinstalled, such as flashing.