Roof cleaning cost in 2026 runs $300 to $1,200 for most homes, with an average around $500–$650. Soft washing (a low-pressure chemical treatment) is priced at roughly $0.20–$0.60 per square foot in the US, while moss removal on a heavily overgrown roof can reach $0.75 per square foot. In Canada, most jobs land between CAD $400 and $1,500. Late summer is the ideal time to book: moss and algae are easiest to kill when the roof is dry, and you get ahead of the fall rain that feeds them.
What affects roof cleaning cost
Roof size and pitch
Pros price by square footage, so a 1,500 sq ft roof costs roughly half of a 3,000 sq ft one. Pitch matters almost as much: anything steeper than 8/12 needs harnesses, roof jacks, and more time, adding 15–30% to the quote.
How dirty it is
Light black streaking (the algae Gloeocapsa magma) cleans off with one soft-wash pass. Thick, established moss that has lifted shingle edges needs hand removal first, then treatment — expect an extra $50–$150 and sometimes a return visit.
Roof material
Asphalt shingle is the standard price. Tile, slate, and cedar shake cost more because they are fragile and need specialized handling. Metal roofs are usually cheaper to clean because the surface is smooth.
Method
- Soft wash: low pressure, biocide solution. The safest and most common choice for shingles.
- Pressure washing: only appropriate for metal or some tile roofs. On asphalt shingles it strips protective granules and can void the manufacturer warranty.
- Moss prevention treatment: zinc or copper-based solution applied after cleaning, $150–$250. Slows regrowth for 1–3 years.
Roof cleaning prices in 2026: US and Canada
| Service | US (USD) | Canada (CAD) |
|---|---|---|
| Soft wash, typical 1,500–2,500 sq ft home | $300–$800 | $400–$1,000 |
| Moss removal (moderate to heavy) | $400–$1,200 | $500–$1,500 |
| Per-square-foot rate | $0.20–$0.60 | $0.28–$0.75 |
| Steep-pitch surcharge | +15–30% | +15–30% |
| Moss prevention treatment (add-on) | $150–$250 | $150–$300 |
| Gutter cleaning bundled with roof | +$100–$250 | +$120–$300 |
Regional pricing skews high where moss is worst. Homeowners in Seattle and Portland routinely pay $600–$1,200 because moss removal is the default job, not the exception. In Vancouver and the Fraser Valley, CAD $500–$1,500 is normal, and Lower Mainland quotes sit above the rest of BC because of insurance, fuel, and labour costs. In drier markets like Denver or Calgary, a basic soft wash often comes in under $400.
DIY vs hiring a pro
A DIY soft wash costs $50–$150 in supplies: a pump sprayer, a bleach or sodium percarbonate solution, and a stiff brush for moss. The catch is the roof itself. Falls from residential roofs are one of the most common serious home-maintenance injuries, wet shingles are slick, and rental pressure washers tempt people into damaging their own roof.
Hire a pro when:
- The pitch is steeper than 6/12 or the roof is two storeys up.
- Moss is thick enough to lift shingle edges (you may also need a roof repair afterward).
- The shingles are more than 15 years old and brittle.
- You want a warranty on the work or a prevention treatment applied properly.
DIY is reasonable for a single-storey, low-pitch roof with light streaking, as long as you use a harness and never walk on wet shingles.
How to hire a roof cleaning company
- Ask for the method in writing. If the answer for an asphalt roof is “pressure washing,” move on.
- Confirm liability and workers’ comp insurance. Roof work is high-risk; an uninsured worker’s fall becomes your claim.
- Get three quotes measured on your actual roof, not a phone estimate. Reputable companies quote from satellite measurements or a site visit.
- Ask about runoff. Bleach solutions kill plants; a good crew wets down and rinses landscaping and covers gutters’ downspout outlets.
- Bundle smart. Many crews discount pressure washing of driveways, siding, or windows when they are already on site.
On Masters’ Guild you post the job with your budget and receive offers from identity-verified pros; payment is held until the work is done. Browse roof cleaning services or find a roof cleaner near you.
Frequently Asked Questions
How often should a roof be cleaned?
Every 2–3 years in most climates. In wet, shaded areas like the Pacific Northwest and coastal BC, an annual moss check and cleaning every 1–2 years is typical.
Does roof cleaning damage shingles?
Soft washing does not. Pressure washing asphalt shingles strips the protective granules and can void your warranty, so insist on low-pressure methods.
Is roof cleaning worth the cost?
Yes. A $300–$800 cleaning every few years can add years to a roof that costs $10,000–$20,000 or more to replace, and it removes the moss that lifts shingles and causes leaks.
Does homeowner insurance cover roof cleaning?
No. Cleaning is routine maintenance and is not covered, though some insurers will require it if an inspection flags moss or algae.
