Tile Roof Cleaning in Florida: Caring for Clay and Concrete Tiles the Right Way
Tile is Florida's dominant roofing material — and the most frequently cleaned incorrectly. Pressure washing tile roofs causes real damage. Here's what actually works.
Clay and concrete tile roofs dominate the Florida residential landscape — they're well-suited to the climate, reasonably durable, and aesthetically characteristic of the state's Mediterranean revival and Spanish colonial architectural traditions. But tile roofs in Florida's humid climate become covered in algae, lichen, and biological growth faster than virtually any other surface. The correct cleaning approach — and avoiding the most common mistake — is critical to maintaining both appearance and integrity of these roofs.
The Biggest Mistake: Pressure Washing Tile Roofs
High-pressure water does two serious things to tile: it erodes the surface coating that protects the underlying material from moisture absorption; and it forces water under tile overlaps, saturating the underlayment and flashings that are designed only for the slow, gravity-fed drainage of natural rain. Tile roofs are not waterproof from above — they're water-shedding systems that rely on gravity and the underlayment for final weather protection.
The Asphalt Roofing Manufacturers Association (ARMA) specifically prohibits high-pressure washing for roofing materials. Florida tile industry standards are equally clear about avoiding high-pressure cleaning.
Soft Washing: The Recommended Method
Professional roof cleaning for tile uses the soft wash method: a carefully formulated cleaning solution — typically a sodium hypochlorite-based formula adjusted for tile surfaces — applied at low pressure (under 100 PSI). The solution penetrates and kills algae, lichen, mold, and other biological organisms at the root level. The dead biological material then breaks down and rinses away naturally over subsequent rainfalls, or is gently rinsed at low pressure.
Lichen: Florida's Most Problematic Roof Organism
Lichen — the crusty, flat organism that looks like dried paint on tile — is the most problematic biological growth on Florida tile roofs. Its root-like hyphae penetrate tile surface coatings, creating a physical grip that persists even after the organism is killed. Severe lichen infestations may require multiple treatments over a season before full release occurs.
Frequency for Florida Tile Roofs
Most Florida tile roofs need professional cleaning every 2–4 years depending on tree canopy, coastal proximity, and the specific roof's orientation. Sarasota and Longboat Key properties near the Gulf may need more frequent attention.
Professional soft-wash tile roof cleaning throughout Tampa Bay. Contact Caldwell Clean for a free quote — call (937) 776-5094.