It can be frustrating when your roof starts to leak, especially if it appears to not be damaged in any way. There are a number of causes of roof leaks that you should be aware of so that you can quickly remedy the situation and prevent any water damage in your home.
Aside from the obvious answer that age causes anything to deteriorate or malfunction, problems with your flashing can cause roof leaks. Flashing is used to describe (when it comes to home improvement) as metal sealants applied to the underside of shingles where large amounts of water travel. These thin pieces of metal create a water-resistant barrier so that rainwater does not leak beyond the rooftop and into the attic of your home. When flashing becomes loose or damaged, it can cause leaks.
Fixing broken flashing is generally simple: remove the roof shingles and remove the cracked and leaking flashing. Using roofing nail, apply and secure a new flashing of a similar shape and size as the previous corroded one before protecting the piece with a fresh coat of roof sealant. If all of this sounds vaguely impossible for you, a local roof professional can get the job done within an hour or two.
A Single Broken Shingle
Shingles can break too! Through aging and strong determined heavy storms with high winds and overall disastrous weather, the roof of your house can take quite a beating. If you ever notice a missing shingle or two (or sometimes thirty -- just lying there on your front yard), you'll probably expect a leaky roof soon. One missing shingle could be enough to cause damage due to running water over the exposed rooftop. When you identify missing shingles, be sure to replace them (go to sites like this one for more info) as soon as possible.
Gathering of Debris
Natural debris such as twigs, branches, leaves, nuts, and pine needles can practically cause a dam buildup on the roof. These materials can clog up and trap water long enough until gravity takes its toll and you'll see water seeping through your attic. Always be sure to keep the roof clear and ensure nothing is entrapped so that the next stormy weather won't provide one inside your house as well.
Debris is never a good sign. While the gutter's main job is to ensure a safe passageway for running water to exit your rooftop, it can also cause backup if you are not doing your job of cleaning the gutter! Clogged gutters causes redirection of running water that may pool up on a random dip on your roof causing the water to sit and eventually soaking into the interiors of your home.