The answer to 'why is my shingles leaking' is that there are several common causes, including worn or damaged shingles, improper installation, and roof ventilation issues. Shingles can become cracked, curled, or loose over time, allowing water to seep through. Incorrect installation techniques, such as improper nailing or flashing, can also lead to leaks. Additionally, inadequate roof ventilation can cause shingles to deteriorate prematurely.
If you notice water stains on your ceiling or walls, or if you can see visible damage to your shingles, it's important to address the problem quickly to prevent further damage and costly repairs. In some cases, you may be able to repair the affected shingles yourself, but for more extensive damage or complex issues, it's best to call a professional roofing contractor.