Most homeowners pay $250 to $600 to clean a roof, with a national average of $440. Here is the price by method, what gets added on, and why shingles should never be pressure washed.
The method should follow the roof material. Shingles get soft washed; pressure is for hard surfaces like metal.
Method
Per square foot
Used for
Soft washing
$0.15 to $0.60
Asphalt shingle and tile roofs
Pressure washing
$0.20 to $0.70
Metal roofs
Moss removal
$0.20 to $0.75
Moss growth on any roof
Source: HomeGuide’s roof cleaning cost guide. HomeGuide adds $0.10 to $0.20 per sq ft for an extra story and $0.15 to $0.20 for a steep roof on soft washing.
High pressure strips the granules that protect the asphalt. Soft washing uses low pressure and a cleaning solution that kills the algae and mold instead.
We get on the roof, photograph what is actually there, and hand you a written report with a price. No charge, and no obligation to book the work with us. If the roof has years left in it, that is what the report will say.
