The roof is basic protection from the vagaries of weather for your house. There are some common varieties of roofs, and there are pros and cons to each of the kinds. The Asphalt roofs are the most widely known and popular kind of roofing system. Their main advantage lies in the fact that they are durable and more affordable than all other varieties. You also get a wide variety of the colors and styles.
They are really easy to set up as compared to other kinds of roofing material. They can withstand a wide range of temperatures too. You can set up a stable system of waterproofing on these roofs which is why this is preferred by the homebuilders and homeowners. They generally last up to 50 years, and this lifespan only reduces if you are the resident of an area that suffers from intense sunlight or such extremes.
However, their lifespan is much shorter than the tiled roofs. They tend to be prone to breaking if walked on. The darker varieties are susceptible to fading, and you might notice some variations in color. These are caused by the action of algae on the material. These algae generally die on their own if exposed to too much of sunlight. There are several varieties of asphalt shingles available that come with algae resistant formulation.
Alternatively, you can go for rinsing it with water after the application of the solution of sodium hypochlorite bleach. This will effectively remove the discoloration on the material.