Cleaning roof tiles effectively requires a blend of soft washing and pressure washing to remove stubborn grime, algae, and moss without harming the tiles. Soft washing is used first to gently treat and kill organic growth with a specialized cleaning solution, ensuring it lifts without damaging the tile surface.
For tougher spots, a low- to medium-pressure wash can be applied afterward to rinse away loosened debris and leave the roof looking refreshed. Together, these methods provide a thorough yet safe cleaning approach, preserving the roof’s longevity and appearance.
Keep reading to learn more about cleaning your roof tiles.
How To Clean Roof Tiles Without A Pressure Washer
To clean roof tiles without a pressure washer, follow these steps to safely remove dirt, algae, and moss:
- Gather Supplies: You’ll need a low-pressure sprayer or garden sprayer, a roof cleaning solution (often a mix of water, bleach, and surfactant), a garden hose, and safety gear like gloves, goggles, and non-slip shoes.
- Prepare the Roof and Area: Inspect the roof for any damaged tiles, and cover plants and landscaping with plastic sheeting to protect them from any runoff.
- Apply the Cleaning Solution: Mix the solution according to product instructions, usually in a 3:1 ratio of water to bleach with a surfactant to help it stick. Use the sprayer to apply the solution evenly across the roof, starting from the top and working downward.
- Let the Solution Sit: Allow the cleaning solution to sit on the tiles for 10–20 minutes to break down grime, algae, and mold. Be careful not to let the solution dry fully.
- Rinse with a Garden Hose: Use a garden hose to rinse the tiles thoroughly from top to bottom, washing away the solution and loosened debris without using high pressure.
- Inspect for Missed Areas: After rinsing, check the roof for any areas that need additional cleaning. Reapply the solution and rinse as needed.
This method effectively cleans roof tiles without risking damage from high-pressure washing, making it safer for delicate or older tiles.
Should You Pressure Wash Roof Tiles?
Unlike asphalt shingles, tile roofs (such as concrete or clay tiles) are durable enough to withstand power washing. Roof cleaners often use a combination of soft washing and power washing to effectively clean tile roofs without causing damage.
Soft washing is typically applied first with a gentle cleaning solution to kill algae, mold, and moss, loosening grime and organic growth at its root. Once the solution has done its job, a low- to medium-pressure wash is used to rinse away the debris, providing a deeper clean without harming the tiles.
This combined approach allows for a thorough cleaning while preserving the tile’s structure and protective coatings, giving the roof a refreshed look and extended lifespan.
How Often Should You Clean Roof Tiles?
Roof tiles should generally be cleaned every 2 to 3 years, depending on the environment and climate around your home. In humid or shaded areas, where algae, moss, and mold grow quickly, more frequent cleaning (annually or every two years) may be necessary.
In sunnier or drier climates, tiles often stay cleaner longer, allowing for a 3-year interval between cleanings. Regular cleaning not only keeps the roof looking good but also prevents the buildup of organic growth that can degrade tiles over time, helping to preserve the roof’s integrity and lifespan.
What Chemicals Are Used To Clean Roof Tiles?
The primary chemicals used to clean roof tiles are sodium hypochlorite and a surfactant. Here’s how they work:
- Sodium Hypochlorite: This is a professional-grade bleach (usually at 10–12.5% concentration) that effectively kills and removes algae, mold, mildew, and moss from roof tiles. It sanitizes the surface, killing organisms at the root to prevent regrowth.
- Surfactant: Added to the sodium hypochlorite mixture, a surfactant acts like a soap, helping the solution adhere to the tile surface. This allows it to stay on longer and work more effectively, especially on vertical surfaces or steeply pitched roofs.
- Water: Typically, sodium hypochlorite is diluted with water in a 3:1 or 4:1 water-to-bleach ratio to ensure it’s strong enough to clean but safe for roof materials.
Some cleaners also add mild algaecides or other inhibitors to reduce future growth. This cleaning mixture is usually applied via a low-pressure sprayer to prevent damage to the tiles and allow the solution to work gradually.
Is Cleaning Your Tile Roof Worth It?
Yes, cleaning your tile roof is definitely worth it. Regular cleaning removes harmful algae, mold, moss, and dirt that can degrade tiles over time, helping to preserve the roof’s structure and extend its lifespan. A clean roof also improves curb appeal, enhancing your home’s overall appearance and potentially increasing its value.
Additionally, removing organic growth and debris prevents tiles from becoming slippery and reduces the risk of cracks or other damage, which can lead to costly repairs down the line. In humid or shaded areas, regular cleaning is especially beneficial to prevent quick regrowth of moss and algae.
Takeaway
Cleaning roof tiles is an essential maintenance step that helps protect and extend the life of your roof. Over time, tiles can accumulate dirt, algae, moss, and mold, especially in humid or shaded areas. This organic growth not only makes the roof look unsightly but can also trap moisture, leading to potential tile damage, cracking, and weakened structural integrity. By regularly cleaning your roof tiles, you prevent these organisms from breaking down the tile material, reducing the risk of leaks or costly repairs
