A Houston Roofing Contractor says, the environment is one major factor which determines the lifespan of composition roofing. Environmental conditions throughout the United States vary and so as the lifespan of composition roofing and even other roofing. Shingles exposed to cooler climates such as that in the Northern United States tend to last longer than those located in the south where they get a lot of the southern sun.
The hotness of a weather causes these shingles to undergo a process called thermal shock. Thermal shock takes place because of abrupt increase or decrease in temperature. The roofing materials aren't immediately able to cope with these changes and as result cracks or splits the materials. Once your roofing materials begin to crack and split the damage to your underlying roof decking will begin.
As soon as the damage is done to these materials water comes along and worsens the condition. Water permits the growth of algae and fungus in the damaged roof and is very difficult to stop. That is why shedding of water in the roof is very important, it avoid problems related to accumulation of water in the future.
Another factor that directly affects the durability of roofing is the ventilation. The roofing contractors should pay close attention to this factor to avoid unexpected damages. Ventilation directly affects the shingles as it gives it good spacing for it properly expand in times of extreme climate changes.
To answer the question, I'll say that it only depends. Typically composition roofing lasts for more than 15 years but less than thirty years and it will totally depend on where you are located and how much sun you are receiving. Even though they may be problems about composition roofing, it is still affordable and it is quite easy to maintain. It's is a very practical roofing style and is the most common.