The age of your roof is normally the most important consideration in deciding whether it can be replaced. When correctly built, most roofs survive for several years and can mostly be fixed rather than replaced. A traditional residential roof has a life expectancy of 15 to 20 years. Water damage to a home's interior or overhangs is often caused by leakage from a single weathered section of the roof, or by improperly mounted flashing around chimneys and skylights.
The easiest way to protect the roof, regardless of its material (composition shingle, wood shake, mortar, or metal), is to keep off of it. Cleaning leaves and dirt from the valleys and gutters of the roof is part of homeowner upkeep. Debris in the roof valleys will make the water to wick under the shingles and impact the roof's interior. Water will flow back under the shingles on the eaves and deteriorate materials if rain gutters get clogged.
Making sound choices is the secret to minimizing both short- and long-term risks associated with any home renovation project. This is particularly true for big, complicated projects such as reroofing. Any of the most critical choices should be taken before hiring a contractor or selecting a shingle maker in this situation. Replacing shingles due to wind erosion or a falling limb is a simple and low-cost job. Torn or broken shingles may be stripped and replaced with new ones. The disadvantage is that your patch job could not fit the original roof unless your roof is relatively new and you happen to have saved any extra shingles from the job.