How to Clean Spanish Tile Roofs

Clean Spanish tile roofs to remove dirt, grime, mold and algae.

Many areas of the U.S. with warm climates favor the Spanish or Mediterranean style of construction for its functional floor plans, ability to capture natural light, and attractive appearance in natural settings. These homes often have clay tile roofs that add to the European flavor and are durable and easy to maintain. Tile roofs withstand rough weather conditions and are inexpensive to repair. Tile roofs require only occasional cleaning.

Things You'll Need

• Ladder
• Helper
• Pressure washer
• Long-handled brush
• Water
• Bleach

Instructions

1. Connect the water supply to the pressure cleaning equipment.

2. Choose a pressure level for cleaning. Use the highest pressure for extremely dirty or moldy deposits.

3. Secure the ladder on a level surface. Have a friend or family member help steady the ladder as you ascend or descend.

4. Assemble your nozzle and other equipment on the roof surface in a safe manner.

5. Assess the condition of the tiles. The color of the tiles may darken when wet, so it's a good idea to make note of dirty areas while the roof is still dry.

6. Spray water on the far corners of the roof first. Use the most powerful setting to lift algae or mold from the tile surfaces.

7. Scrub areas of heavy mold or algae deposits with a long-handled brush.

8. Spray with bleach solution to remove stubborn dirt and stains.

9. Rinse thoroughly.

Tips & Warnings

• A solution of 1 part chlorine bleach to 4 parts of water can be added to the pressure washer tank for heavy mold cover, according to ConsumerBuild.org.nz.

• Holding the pressure washer wand about 6 inches from the tile surface will allow the pressure to remove mold, algae and lichens, according to website AskTheBuilder.com.

• The bleach solution should be left on tiles for 5 to 15 minutes to kill mold and algae before rinsing.

• Hold the pressure washer nozzle straight down on the tile surface. Do not allow the water to shoot upward, as this can work under tiles and cause water damage.

• Wet tile can be extremely slippery. Try to remain on dry areas as you work your way across the roof surface. Avoid walking on wet areas whenever possible.

• Algae and lichens that have been loosened from the tile can make the surface of the roof even more slippery. Use caution.

• Never pressure spray while you stand on the ladder. The force of the pressure can disrupt your balance and cause you to fall.

• Cover plants and bushes near the roof area to prevent damage from bleach solution.

References

• Consumer Build: Tile Roofs
• Ask the Builder: Roof Cleaning