Your roof endures harsh weather, collects debris, and over time develops unsightly stains, moss, and algae growth. While pressure washing might seem like a quick solution, it can actually damage your shingles and void your warranty. Soft wash roof cleaning offers a gentler, more effective approach that protects your investment while delivering superior results.
We’ll cover the essential equipment, safety considerations, proper cleaning solutions, and techniques that professional roof cleaners use to restore your roof’s appearance without causing damage. Plus, we’ll explain why soft wash roof cleaning is becoming the preferred method for homeowners who want long-lasting results. Here’s what we’ll cover:
- What is soft wash roof cleaning
- Equipment needed
- Step-by-step process
- When to call the pros
🤔 What Is Soft Wash Roof Cleaning?

Soft wash roof cleaning uses low-pressure water combined with specialized cleaning solutions to safely remove dirt, algae, moss, and stains from your roof. Unlike pressure washing, which relies on high-pressure water that can damage shingles, soft washing uses gentle pressure—typically around 100 PSI or less—along with biodegradable chemicals that do the heavy lifting.
The cleaning solutions used in soft washing are specifically formulated to kill algae, moss, and bacteria at the root level. This approach not only cleans your roof more thoroughly but also provides longer-lasting results since it eliminates the organisms that cause staining rather than just washing them away temporarily.
Professional soft wash systems typically include sodium hypochlorite (a form of bleach), surfactants to help the solution cling to surfaces, and water to dilute the mixture to safe levels. These solutions are applied to the roof, allowed to dwell for a specific time, then rinsed away with low-pressure water.
Benefits of Soft Wash Roof Cleaning
- Protects Your Roof: Soft washing uses low-pressure application, preventing damage to shingles and preserving manufacturer warranties.
- Long-Lasting Results: The cleaning solutions kill algae, moss, and bacteria at the source, keeping your roof cleaner for longer compared to pressure washing.
- Environmentally Friendly: Biodegradable solutions, minimal water usage, and reduced runoff make soft washing a greener option.
- Cost-Effective: By extending the time between cleanings and preventing damage, soft washing saves on maintenance, repairs, and can prolong your roof’s lifespan.
🧰 Equipment and Materials Needed
Before beginning any soft wash roof cleaning project, you’ll need specific equipment and materials.
- A professional soft wash system includes a mixing tank, low-pressure pump, chemical-rated hoses, and specialized spray nozzles.
- Essential safety gear includes non-slip shoes, safety harnesses, eye protection, chemical-resistant gloves, and long-sleeved clothing.
- The cleaning solution typically combines sodium hypochlorite, a surfactant for adhesion, and water, with tarps or plastic sheeting protecting landscaping and furniture.
- Additional tools include a garden sprayer for small jobs, soft-bristled brushes for tough spots, and plenty of water for rinsing—avoid metal tools to prevent damage.
✅ 6 Step-by-Step Soft Wash Roof Cleaning Process

A proper soft wash roof cleaning process prevents damage to roofing materials while effectively removing dirt, algae, and stains. Following a step-by-step method ensures a thorough, safe, and long-lasting clean.
1. Safety Preparation and Assessment
Begin by thoroughly inspecting your roof for damage, loose shingles, or structural issues that could make cleaning dangerous. Check weather conditions—avoid windy days or when rain is expected within 24 hours. Set up proper safety equipment including harnesses, ropes, and ensure you have a stable ladder with someone to spot you.
2. Protect Surrounding Areas
Cover all plants, outdoor furniture, and vehicles with plastic sheeting or tarps. Pre-wet all vegetation around the house with plain water—this dilutes any overspray that might reach plants. Close all windows and doors, and ensure pets and people stay away from the work area.
3. Mix Your Cleaning Solution
Create your cleaning solution following manufacturer guidelines, typically mixing one part sodium hypochlorite with three parts water, plus surfactant as directed. Always add chemicals to water, never the reverse, to prevent dangerous reactions. Mix only what you can use in one session, as the solution loses effectiveness over time.
4. Apply the Cleaning Solution
Start at the bottom of the roof and work your way up to prevent streaking. Apply the solution evenly using low pressure, ensuring complete coverage of stained areas. Pay special attention to north-facing slopes and shaded areas where algae and moss typically thrive. Allow the solution to dwell for 10-15 minutes, but don’t let it dry completely on the surface.
5. Rinse Thoroughly
Using clean water at low pressure, rinse the roof starting from the top and working down. This prevents dirty water from running over clean areas. Ensure all cleaning solution is completely removed, paying special attention to gutters and downspouts. Continue rinsing until the water runs clear.
6. Final Inspection and Cleanup
Inspect your work for missed spots or areas needing additional attention. Remove all protective coverings from plants and furniture, then thoroughly rinse all vegetation with clean water to remove any residual chemicals. Properly dispose of any leftover cleaning solution according to local regulations.
📞 When to Call Professional Roof Cleaners

While some homeowners can successfully perform soft wash roof cleaning themselves, many situations require professional expertise.
Steep Roofs and Safety Risks
Steep roofs, roofs over two stories, or those with complex angles and multiple levels pose significant safety risks. These are best handled by trained professionals with the right equipment.
Expertise and Equipment
Professional roof cleaning companies, like AllPhase Roofing & Restoration, bring specialized equipment and extensive experience to every job. They know the correct chemical mixtures for various roofing materials and can spot potential problems during the cleaning process.
Handling Safety Concerns
Professionals manage all safety aspects, including proper ladder placement and fall protection systems. They also carry liability insurance, protecting both themselves and your property, especially when working with cleaning chemicals and water near your home’s foundation and landscaping.
Year-Round Maintenance
Many professional companies also provide maintenance programs to keep your roof clean and in good shape throughout the year. This can help any homeowner have more peace of mind after a finished project.
🤝 Trust AllPhase for Your Roof Cleaning Needs
When it comes to maintaining your roof’s appearance and integrity, choosing the right team makes all the difference. AllPhase Roofing & Restoration has served Ohio homeowners for years, providing comprehensive roofing services that protect your investment and enhance your home’s curb appeal.
Ready to restore your roof’s appearance with safe, effective soft wash cleaning? Contact AllPhase Roofing & Restoration today to schedule your free roof inspection online. Let our experienced team show you why Ohio homeowners trust us for all their roofing needs.