How Do You Find a Quality Roof Cleaning Company?
A quality roof cleaning company soft washes asphalt shingles and never pressure washes them, carries insurance that specifically covers roof work, and protects your landscaping from runoff. Ask what pressure they use and whether they run a downstream chemical injector or a 12-volt soft-wash system, because with roof cleaning the wrong technique causes permanent shingle damage.
They Use Soft Washing Only on Asphalt Shingles
This is non-negotiable. Any company that proposes high-pressure washing of asphalt shingles should not be hired it removes the granule coating that protects the asphalt from UV degradation, voids the shingle manufacturer’s warranty, and shortens the roof’s remaining life. The ARMA-recommended method is soft washing: low-pressure application of sodium hypochlorite solution, dwell time, and low-pressure rinse. When interviewing companies, ask specifically: what pressure do you use, and do you use a downstream chemical injector or a 12-volt soft-wash system? A company that knows soft-wash cleaning discusses their system a company that doesn’t may not be using it. (For more on this, see Questions to Ask Before Hiring a Roof Cleaning Company.)
They Carry Appropriate Insurance for Roof Work
Roof cleaning involves working at height on sloped surfaces. Fall risk is significant. The cleaning company must carry general liability insurance (covering property damage) and workers’ compensation (covering worker injuries on your property). Some general liability policies exclude work above a certain height ask specifically whether the policy covers roof work. A certificate of insurance that excludes roof work does not protect you. (For more on this, see Does Roof Cleaning Void Your Warranty?.)
They Protect Your Landscaping
Ask specifically: how do you protect my landscaping from chemical runoff? A quality company describes pre-watering plants, using directed spray angles away from plantings, and rinsing the landscape area after cleaning. A company that says ‘it’s diluted enough’ without describing a specific protection protocol is not adequately managing the landscaping risk.
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project.
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
How to Use This Guide
Finding the right contractor is the most important decision in any home services project. The criteria in this article reflect what distinguishes contractors who deliver excellent work from those who do not, based on the specific quality factors that matter for this type of work.
Use the criteria here as a screening framework, not a checklist to be completed mechanically. A contractor who scores well on the criteria that matter most for your specific project, home, and concerns is a better match than one who technically checks every box but does not communicate clearly or does not have local experience with your type of home.
The right contractor is one who provides a clear, written proposal with specific materials and scope, is licensed and insured, has verifiable local references from similar work, and backs their installation with a meaningful warranty. When you are ready to compare your options, use the button below to connect with qualified local professionals in your area.
Roof Cleaning Cost at a Glance
Roof size: Larger roofs cost more due to more area to clean.
Roof pitch: Steeper roofs cost more for special equipment and safety measures.
Growth severity: Heavy moss, algae, or lichen means more work and higher cost.
Overall range: $400 to $1,200, averaging $700.
Cost figures on this page were checked against published pricing on August 30, 2026. How we source cost data.