The answer to 'why is my architectural shingles' is that there are several common causes for issues with architectural shingles, including improper installation, weathering and wear over time, and damage from environmental factors. Symptoms may include curling, cracking, or missing shingles, as well as leaks or water damage. Solutions can range from simple repairs to complete roof replacement, depending on the extent of the problem.
For minor issues, homeowners may be able to perform some DIY repairs, such as replacing individual shingles or resealing edges. However, for more significant problems or if you're unsure of the cause, it's best to call in a professional roofing contractor to inspect the roof and provide the appropriate solution.