The answer to 'asphalt shingles damaged' is that there are several common causes, including severe weather, age, improper installation, and lack of maintenance. Symptoms can include curling, cracking, blistering, or missing shingles. The best solution depends on the extent of the damage, but minor issues may be DIY-friendly while more significant problems often require a professional roofing contractor.
If the damage is limited to a few shingles, you may be able to replace them yourself. However, if the damage is widespread or the roof is older, it's generally best to have a professional inspect the roof and provide a recommendation. They can properly assess the condition, identify the root cause, and determine the best course of action, whether that's a roof repair or a full roof replacement.