The answer to 'architectural shingles water stains' is that water stains on architectural shingles are often caused by improper installation, roof damage, or poor ventilation. Symptoms include visible discoloration, streaking, or dark spots on the shingles. Solutions may include replacing damaged shingles, improving roof ventilation, or addressing any underlying issues like leaks or poor drainage.
In many cases, minor water stains can be addressed through DIY cleaning and maintenance. However, if the issue is more extensive or the cause is unclear, it's best to call a professional roofing contractor to properly diagnose and resolve the problem.