Accumulation of algae, moss, lichen, and general grime on tile roofs, leading to aesthetic degradation and potential material damage, including dark streaks, discoloration, and organic growth. Troubleshooting & Fixes

Quick Answer

The most common fix for a dirty tile roof is a low-pressure chemical wash, or 'soft wash.' This method safely kills algae, moss, and lichen using specialized cleaners without risking damage to the tiles from high pressure. A DIY approach using a pump sprayer and a cleaner like Wet & Forget can cost $50-$200. Hiring a professional roofing service for a thorough soft wash typically costs between $500 and $1,500, depending on your roof's size and the severity of the growth. This professional approach ensures safety and a long-lasting result.