How to Clean Asphalt Shingles Safely: A Windermere & Central Florida Guide
Updated: Sep 28
Black streaks on asphalt shingles are usually caused by algae and can make a home look older and less maintained than it really is. Moss and other organic growth can also become a concern when they are allowed to remain on the roof for extended periods.
If you live in Central Florida whether in Windermere, Lake Nona, Dr. Phillips, or another Orlando area community. Florida's humidity, rainfall, shade, and surrounding vegetation can create conditions where roof algae and organic growth return over time.
The good news is that asphalt shingles can be cleaned without aggressive pressure. The key is using an appropriate cleaning solution, controlled low-pressure application, and careful protection of the surrounding property.
Table of Contents
Step 1: Inspect the Roof and Plan the Cleaning
Step 2: Gather the Right Soft-Washing Supplies
Step 3: Apply the Cleaning Solution at Low Pressure
Step 4: Rinse Carefully and Protect the Property
Step 5: Inspect the Results and Plan Future Maintenance
FAQ: Cleaning Asphalt Shingles Safely
Conclusion
Step 1: Inspect the Roof and Plan the Cleaning
Start by inspecting the roof from the ground and walking the perimeter of the home. Look for black streaks, algae discoloration, moss, lichen, loose shingles, damaged flashing, and areas where vegetation or debris may be collecting.
Pay particular attention to shaded sections of the roof. Homes surrounded by mature landscaping or located near lakes and ponds can have areas that stay damp longer, which can contribute to recurring organic growth.
Before cleaning, check the gutters and downspouts for visible debris or blockages. Also inspect the surrounding property and identify plants, outdoor furniture, pool areas, windows, and other surfaces that may need protection during the cleaning process.
Weather matters, too. Choose a period without rain and avoid applying cleaning solutions during strong winds that could carry the solution toward people, animals, neighboring property, or landscaping.
Write down the approximate roof size, pitch, number of stories, and roofing material. These details help determine the appropriate equipment, cleaning solution, and amount of preparation required.
For additional information about roof maintenance, see our guide on How to Clean Roof Shingles Safely .
Key Takeaway: A careful inspection helps identify potential roof problems before cleaning begins and allows you to plan the job around the roof material, weather, landscaping, and property layout.
Step 2: Gather the Right Soft-Washing Supplies
The cleaning method should always be appropriate for the roofing material and consistent with the shingle manufacturer's recommendations and the cleaning-product label.
For asphalt shingles, avoid using high-pressure washing equipment. High pressure can remove protective granules, damage shingles, and force water beneath roofing materials.
You will also need appropriate application equipment, protective equipment, and supplies for protecting nearby landscaping and exterior surfaces.
Never mix chlorine bleach with vinegar, acids, ammonia, or other incompatible cleaning products. Dangerous gases can be produced when bleach is mixed with certain household chemicals. Always read and follow the product label before use.
If roof access is required, consider hiring a qualified professional. A wet roof can become extremely slippery, and working at height introduces significant fall risks.
Before applying any cleaning solution, pre-wet nearby plants and landscaping with clean water and protect sensitive areas as appropriate.
Pro Tip: Keep cleaning products in clearly labeled, compatible containers and follow the manufacturer's mixing and handling instructions. Don't improvise chemical combinations.
Step 3: Apply the Cleaning Solution at Low Pressure
Do not use high-pressure washing on asphalt shingles.
Instead, use a controlled low-pressure application method and a cleaning solution appropriate for the roofing material and product instructions.
Apply the solution evenly to the affected areas while avoiding unnecessary overspray. Keep the spray directed away from people, pets, neighboring property, and sensitive surfaces.
Allow the cleaning solution to dwell for approximately 15–20 minutes when appropriate, following the product label and roofing manufacturer's recommendations. Do not allow the solution to dry completely on the roof.
During the dwell period, monitor the roof and surrounding property. If weather conditions change or wind begins carrying the solution where it shouldn't go, stop the application and reassess the conditions.
As the solution works, dark algae staining and other organic discoloration should begin to loosen. Heavier areas may require additional treatment rather than increased pressure.
Key Takeaway: The goal is to let the cleaning solution do the work—not to blast the shingles with water pressure.
Step 4: Rinse Carefully and Protect the Property
When the treatment is complete, rinse according to the cleaning-product and roofing-material recommendations.
Use controlled pressure and avoid directing water upward underneath shingle edges. The objective is to remove the cleaning solution and loosened material without stressing the roofing system.
Continue protecting nearby landscaping throughout the process. Keep plants and sensitive surfaces wet with clean water as appropriate, and thoroughly rinse areas that may have come into contact with runoff.
Pay particular attention to gutters, downspouts, windows, walls, pool areas, patios, and outdoor furniture.
If you notice a damaged or loose shingle during the process, stop and address the roofing issue rather than attempting to compensate with additional pressure.
Do not walk on wet asphalt shingles. Inspect the results from a safe location whenever possible.
Pro Tip: Roof cleaning is not a race. A controlled application, appropriate dwell time, and careful property protection are more important than trying to finish as quickly as possible.
Step 5: Inspect the Results and Plan Future Maintenance
Once the roof has been cleaned and the surface has dried, inspect the results from the ground or another safe location.
Look for remaining dark streaks, areas of organic growth, damaged shingles, loose granules, or other conditions that may require attention.
Document the date of cleaning and any observations that could help with future maintenance.
In Central Florida, algae and organic growth can return depending on humidity, rainfall, shade, tree coverage, roof orientation, and surrounding vegetation. Rather than relying on a fixed schedule for every property, monitor the roof and have it evaluated when new staining begins to appear.
Homes in communities such as Windermere, Lake Nona, and Dr. Phillips can have very different roof materials, landscaping, shade conditions, and property layouts. A maintenance plan should therefore be based on the actual condition of the roof rather than a one-size-fits-all schedule.
When professional help is needed, see our Orlando roof cleaning service for more information about our low-pressure soft-washing approach and property-protection practices.
Key Takeaway: Regular visual inspections and proper cleaning methods can help keep asphalt shingles looking better while reducing the risk of damage caused by aggressive cleaning techniques.
FAQ: Cleaning Asphalt Shingles Safely
Can I use a pressure washer on asphalt shingles?
High-pressure washing is not recommended for asphalt shingles because it can remove protective granules, damage the roofing surface, and force water beneath the shingles.
A low-pressure soft-washing approach allows the cleaning solution to do the work without relying on aggressive water pressure.
For more information, see Does Roof Cleaning Damage Shingles? Safe Methods for Asphalt Roofs.
What concentration of bleach is safe for asphalt shingles?
Roof-cleaning solutions should always be used according to the roofing manufacturer's recommendations and the cleaning-product label.
ARMA's published roof-cleaning guidance describes a 50:50 mixture of laundry-strength liquid chlorine bleach and water for treating algae and moss on asphalt roofing. However, homeowners should not assume that one mixture is appropriate for every roof or product.
Never mix bleach with vinegar, acids, ammonia, or other incompatible cleaners.
Do I need to protect my plants during roof cleaning?
Yes.
Cleaning solutions and runoff can affect landscaping. Plants should be thoroughly pre-wet with clean water, protected as appropriate, and rinsed with fresh water during and after the cleaning process.
This is especially important for properties with extensive landscaping, pool areas, flower beds, and plants located directly beneath roof edges.
How often should I schedule a soft-wash?
There is no single schedule that works for every Florida home.
Roof orientation, shade, humidity, tree coverage, rainfall, and surrounding vegetation all affect how quickly algae and organic growth return.
Instead of automatically cleaning every roof at the same interval, inspect the roof periodically and consider professional cleaning when significant staining or organic growth returns.
Is professional soft-washing worth the cost?
Professional roof cleaning can reduce the risks associated with working at height, chemical handling, and improper pressure.
A professional can also evaluate the roof before cleaning, select an appropriate cleaning approach, protect surrounding landscaping, and recognize conditions that may require a roofing contractor rather than a cleaning service.
For homeowners in Windermere, Lake Nona, Dr. Phillips, and surrounding Central Florida communities, choosing a contractor familiar with local roof types and property conditions can be especially helpful.
Conclusion
Cleaning asphalt shingles safely is less about using more pressure and more about using the right method.
Inspect the roof first, use an appropriate cleaning solution, apply it at low pressure, allow adequate dwell time, protect the surrounding property, and rinse carefully. Most importantly, avoid aggressive pressure that can damage asphalt shingles.
If you would rather leave the roof cleaning to a professional, contact Performance Pressure Wash for a roof soft-washing estimate in Orlando and surrounding Central Florida communities, including Windermere, Lake Nona, Dr. Phillips, Hunters Creek, and Kissimmee.
We are licensed and insured and focus on protecting your roof and property while delivering a clean, professional result.
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