How to Clean a Roof: Flat, Shingles, Frequency & More

Jun 5, 2019


Welcome to Bio-One Atlanta's comprehensive guide on how to clean a roof. As experts in the business and consumer services industry, specializing in cleaning, we understand the importance of maintaining a clean and well-maintained roof. In this guide, we will discuss various aspects of roof cleaning, including cleaning techniques for flat and shingle roofs, recommended cleaning frequencies, safety precautions, and more. Let's dive right in!

Cleaning Flat Roofs

Cleaning a flat roof requires a different approach compared to shingle roofs. With a flat roof, the main concern is removing debris, moss, and algae that can accumulate over time. Here are some steps to effectively clean a flat roof:

  1. Step 1: Safety First
  2. Prioritize safety by wearing appropriate protective gear, such as gloves and non-slip shoes. Also, ensure the roof is stable and secure before starting the cleaning process.

  3. Step 2: Remove Debris
  4. Begin by removing any leaves, branches, or other debris from the roof. This can be done with a broom or a leaf blower.

  5. Step 3: Moss and Algae Removal
  6. To remove moss and algae from a flat roof, you can use a gentle scrub brush or a low-pressure power washer. Be careful not to damage the roofing material while cleaning.

  7. Step 4: Cleaning Solution
  8. Prepare a cleaning solution by mixing water and mild detergent. Apply the solution to the roof surface and scrub gently to remove any remaining dirt or stains.

  9. Step 5: Rinse and Inspect
  10. Thoroughly rinse the roof with water to remove any traces of the cleaning solution. Take this opportunity to inspect the roof for any signs of damage or leaks.

Cleaning Shingle Roofs

Shingle roofs require a slightly different approach when it comes to cleaning. Here are some steps to effectively clean a shingle roof:

  1. Step 1: Safety Precautions
  2. Ensure your safety by using safety harnesses, sturdy ladders, and slip-resistant shoes. Your well-being is essential throughout the cleaning process.

  3. Step 2: Remove Debris
  4. Begin by manually removing any loose debris, such as leaves, twigs, or branches from the roof. Use caution to avoid damaging the shingles.

  5. Step 3: Moss and Algae Treatment
  6. If your shingle roof is affected by moss or algae, treat it with a specialized solution designed for roof cleaning. Follow the product instructions carefully for optimal results.

  7. Step 4: Pressure Washing
  8. Consider using a low-pressure power washer for deep cleaning. Start from the top and work your way down, ensuring even coverage without applying excessive pressure.

  9. Step 5: Inspection and Repairs
  10. Complete the cleaning process by thoroughly inspecting the shingles for any signs of damage or wear. Make necessary repairs to maintain the integrity of your roof.

Cleaning Frequency and Maintenance

The frequency of roof cleaning largely depends on various factors, including the local climate, surrounding foliage, and the type of roof material used. In general, it is recommended to clean your roof at least once or twice a year. Regular cleaning and maintenance help prevent the buildup of dirt, moss, and debris, prolonging the lifespan of your roof.

However, if you notice specific issues such as heavy algae or mold growth, it may be necessary to clean your roof more frequently. Keep an eye out for any signs of damage, leaks, or discoloration that may require professional attention.

Safety Precautions

When cleaning your roof, always prioritize safety. Here are some essential safety precautions to keep in mind:

  • Use proper safety equipment: Wear protective gear, including gloves, safety goggles, and non-slip shoes to prevent accidents.
  • Work with a partner: Having someone assist you during the cleaning process can enhance safety and provide an extra set of eyes.
  • Be aware of your surroundings: Ensure you are mindful of power lines, nearby structures, and other potential hazards.
  • Follow manufacturer instructions: If you use specialty cleaning products, strictly adhere to the instructions provided by the manufacturer.


Congratulations, you now have the knowledge to effectively clean your flat or shingle roof. Regular roof maintenance is essential to protect your investment and maintain the overall aesthetic appeal of your property. Remember to prioritize safety and consult professionals when needed. If you require expert assistance with your roof cleaning needs, don't hesitate to contact Bio-One Atlanta, your trusted partner in the business and consumer services industry. We are here to help you keep your roof clean and well-maintained.