Shingle roofs have a life expectancy of about 20 years, depending on weather and other conditions. Your roof might need to be replaced or repaired if you see some of the following conditions: if you find excessive shingle granules in your rain gutter; if you notice that some of your shingles are missing (especially after high winds); if you see curling, torn, or cracked shingles; if there are water stains on ceilings or walls; or if you see blistering paint.
In fact, most homes in North America that aren’t flat have asphalt shingles on them. This is because asphalt shingles are the least expensive, they are comparatively lightweight, and they have pretty good durability, considering their cost. They also come in a number of different colors, and several different weights (20-25 year lifespan, depending on the weight).
Since they don’t weigh much (compared to other roofing materials, such as mission tile or natural slate), the average roof can easily support them. So you shouldn’t have to be concerned about your house’s ability to support them. They do provide good weatherproofing for the most part, however, they are not as strong as tile or slate under the effects of large hailstones, and they do tend to rip out more easily in heavy winds.
Another downside of asphalt shingles is that they catch fire readily when sparks or burning debris from nearby fires land on them. And clay tile roofs last about 3 times as long as asphalt shingle roofs, and natural slate tile roofs last about 6 times as long as asphalt shingle roofs. In addition, the clay tile and stone tile roofs are the most beautiful roofing option. However, asphalt shingles remain the most practical choice for most homeowners’ needs in North America.