Roof Cleaning FAQ — Columbus, Ohio

Answers to the most common questions about roof cleaning, treatmenting, pricing, and our process. Can't find your answer? Call us at (888) 516-0008.

Those black streaks are a living organism called Gloeocapsa Magma — a hardy form of algae that feeds on the limestone filler in asphalt shingles. It thrives in Ohio's humid summers and spreads from roof to roof via wind and birds. Rain won't wash it away. It will only spread and accelerate roof deterioration until it's professionally treated with a biocide solution. The good news: Forza Roof Cleaning can completely eradicate it.
Most residential roof cleanings in Columbus range from $500–$1,500. What we've found is that no matter what your roof is made of, a cleaning usually comes in at around 5–10% of the cost to replace it. Of course, it all depends on the size, pitch, roof material, and severity of the bio-growth. Cedar, slate, and tile roofs typically cost more due to the specialized care and solution required. Commercial properties are quoted separately. We provide free, no-obligation estimates after a drone assessment — no inflated “discount” pricing like a used car salesman from the 80's, just honest quotes so you can make an informed decision on what's best for you. We'd rather lose your business with the truth than gain it with lies. Life is much simpler that way.
Our cleaning process is completely safe for all roof types. We do NOT use a pressure washer on roofs — high pressure voids every manufacturer warranty on the planet and physically damages shingles by removing the protective granule layer. Our method is the gentlest cleaning process on the planet. We gently apply our biodegradable algaecide solution at low pressure from a secure ladder just above the gutter line. This allows us to systematically cover every inch of your roof without ever walking on it. Non-invasive from beginning to end.
Our roof cleanings come with a 3-year bio-free guarantee. If any bio-growth returns within 3 years, we come back and treat it for free — no questions asked, no excuses. The guarantee is fully transferable if you sell your home. Most roofs stay clean for 5–7+ years after treatment. We have some of the first roofs we ever cleaned still looking good and going strong over a decade later. It just all depends on tree coverage, shade, and local humidity levels. A low-sloped ranch roof sitting in direct sunlight will take a lot longer for bio to form than a steep-sloped roof sitting below a big tree canopy in constant shade.
Yes! If we can get FAA clearance. It's usually not an issue unless you live close to CMH or OSU airports. Even then, we can usually get clearance within a few minutes. Sometimes, it may take longer based on the air traffic going on that day. Regardless, we fly a drone before every job to photograph and assess the roof. This lets us see exactly what's going on — including areas not visible from the ground — develop the right treatment plan and give you an accurate estimate. The drone assessment is included free with every quote. We also do a post-cleaning drone inspection to confirm complete coverage.
No, you don't need to be home. In fact, most people take the day to go do something fun while we work since we can't have people, children, or pets running around while we're working. All we will need is for the driveway to be clear so we can move ladders and hoses around safely and access to a working water spigot. We'll take care of the rest. If you like, we can also send you a link to your before-and-after drone photos via email when the job is complete, so you can see exactly what was done.
Yes, in the manner we use it. It's not something you want to pour directly onto a thirsty plant but the way we gently apply it to your roof surface, above your gutter line, it's perfectly safe. Unlike humans, plants only consume what they need. Having a person on the ground watering all the plants before, during, and after we clean the roof ensures everything stays safe on the ground while the algae, moss, and lichen are being eradicated on the roof. After cleaning over 1,500 roofs, we have the process down to a science. Your roof and landscapes are safe with Forza.
Most residential roofs are completed in 2–4 hours. Larger homes, steep pitches, or heavily soiled roofs may take 4–8 hours. Cedar and slate roofs require more careful application and may take 4–10 hours. Regardless of how long it takes, you'll know that it's being done with the utmost care and respect for your roof and property.
We serve Columbus and 60+ surrounding communities including Dublin, Westerville, Hilliard, Upper Arlington, Grove City, Gahanna, Pickerington, Powell, New Albany, Reynoldsburg, Worthington, Delaware, Marysville, Lancaster, and many more. We also clean roofs in Cleveland, Dayton, and Cincinnati and every town in between. On occasion, we'll even clean a roof out of state if it makes sense for us to do so. No matter where your roof is located, let's discuss it. Call us at (888) 516-0008 to explore the possibilities.
No, if Forza is cleaning your roof. Our extremely gentle cleaning system does ZERO damage to the roof. Our cleaning method preserves your manufacturer warranty. Pressure washing VOIDS shingle warranties by removing granules and damaging the mat. Our process cleans very effectively without any warranty risk. We've cleaned over 1,500 roofs with ZERO damage. Your roof is safe with us!
Yes — cedar shake roofs are one of our specialties. Cedar requires a different approach than asphalt because it's a natural, porous wood that can be damaged by pressure and bleach. We use a cedar-safe formulation applied at very low pressure that kills bio-growth without harming the wood fibers. See our Cedar Roof Cleaning page for more details.
Yes. We clean commercial roofs of all types — EPDM, TPO, metal, tile, and asphalt — for apartment complexes, office buildings, churches, warehouses, and retail properties throughout Central Ohio. Commercial jobs are quoted individually based on size and access requirements.
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