How Much Does Roof Cleaning Cost? (2026 Guide)
What roof cleaning actually costs
Most homeowners across Northeast Connecticut, Worcester County, and Rhode Island pay between $400 and $750 to have an average single-family roof professionally cleaned. Smaller ranch roofs can come in around $300, while large, steep, or heavily stained roofs can run $900 to $1,500.
The biggest factors are roof size (measured in squares), pitch, how much black streaking or moss is present, and how accessible the roof is from the ground. At Applewood, we quote a flat price up front after seeing a few photos, so there are no surprises when the crew shows up.
Those black streaks aren't just dirt
The dark streaks running down most asphalt roofs are a blue-green algae called Gloeocapsa magma. It feeds on the limestone filler in your shingles, and left alone it slowly eats away the protective granules that keep your roof watertight. Moss is worse, it holds moisture against the shingle, lifts the edges, and creates ice dams in winter.
Cleaning isn't only cosmetic. Clearing the algae stops it from eating away at your shingles, and many shingle warranties actually require periodic cleaning to stay valid.
Soft wash, never pressure wash
This is the part that protects your investment: a roof should never be cleaned with high pressure. The Asphalt Roofing Manufacturers Association recommends a low-pressure soft wash using a detergent solution that kills algae and moss at the root. High-pressure washing blasts the granules right off your shingles and can void your warranty.
What affects your price
- Roof size and number of stories
- Pitch and walkability
- Amount of algae, moss, or lichen
- Tree cover and how quickly the roof will re-soil
- Add-ons like gutter cleaning at the same visit
How often should you clean your roof?
In our shaded, humid New England climate, most homes benefit from a roof cleaning every 2 to 4 years. North-facing roofs and homes under heavy tree cover sit on the shorter end of that range.
Get a flat quote
Applewood Exterior Cleaning soft washes roofs across Northeast Connecticut, Worcester County, MA, and Rhode Island. Text a few photos of your roof to (860) 553-9326 and we'll send a flat quote, usually within the hour.