Softwashing a cedar roof involves using a low-pressure method to clean and treat the roof with a specialized cleaning solution. Here are some pros and cons associated with softwashing a cedar roof:


  1. Gentle Cleaning: Softwashing is a low-pressure method that is gentler on cedar roofs compared to high-pressure methods. It helps prevent damage to the wood, preserving its integrity.
  2. Effective Cleaning: Softwashing can effectively remove moss, algae, mildew, and other organic growth without causing harm to the cedar shingles. It provides a thorough cleaning without the risk of physical damage.
  3. Long-lasting Results: Softwashing not only cleans the cedar roof but also includes the application of a treatment solution. This treatment helps to prevent the regrowth of algae and other organic matter, providing longer-lasting results compared to just cleaning alone.
  4. Preservation of Appearance: Softwashing helps maintain the natural beauty and appearance of cedar roofing by cleaning it without causing discoloration or damage.
  5. Eco-Friendly Options: Some softwash solutions are formulated to be environmentally friendly, reducing the impact on surrounding plants, soil, and water sources.


  1. Cost: Softwashing cedar roofs may be more expensive than other cleaning methods. The specialized cleaning solutions and equipment can contribute to higher costs compared to DIY or traditional cleaning methods.
  2. Professional Expertise: Softwashing requires knowledge and expertise in the proper application of cleaning solutions and treatments. Hiring a professional is often recommended to ensure the process is done correctly and safely.
  3. Potential Water Intrusion: While softwashing uses low pressure, there is still a risk of water intrusion if not done properly. It’s essential to seal any vulnerable areas and ensure that water does not penetrate the roof’s structure.
  4. Temporary Discoloration: Some cleaning solutions used in softwashing may cause temporary discoloration to the cedar roof. However, this typically fades over time, leaving the roof looking revitalized.
  5. Ongoing Maintenance: Softwashing doesn’t offer a permanent solution. Regular maintenance may be required to keep the cedar roof clean and free from organic growth.

Before deciding on softwashing or any other method for cedar roof maintenance, it’s advisable to consult with professionals, consider the specific needs of your roof, and weigh the pros and cons based on your priorities and budget.