The answer to 'why is my architectural shingles damaged' is that there are several common causes, including severe weather, improper installation, and normal wear and tear over time. Symptoms may include cracked, curled, or missing shingles, as well as leaks in your roof.
If the damage is minor, such as a few cracked or missing shingles, you may be able to handle the repairs yourself. However, for more extensive damage or if you're unsure of the cause, it's best to call in a professional roofing contractor to inspect the issue and provide a solution.