Roof Cleaning in Seacoast, NH
Those black streaks are living algae eating your shingles. We soft wash them off without blasting a single granule loose.
Those black streaks are living algae eating your shingles. We soft wash them off without blasting a single granule loose.
Those dark streaks running down your roof are not dirt. They are a hardy algae that feeds on the limestone filler in asphalt shingles. Left alone it spreads, traps heat, and shortens the life of the roof. Black Diamond removes it with a soft wash method the shingle manufacturers actually recommend.
Asphalt shingles cannot take pressure. A pressure washer strips the protective granules and ages the roof faster than the algae would. The industry-approved fix is a low-pressure soft wash: we apply a treatment that kills the algae and moss, then let it rinse clean. No blasting granules into the gutters, no unnecessary damage.
Killing the algae stops it from eating the shingle and spreading to neighboring roofs. It also brings back the clean, uniform look that black streaks quietly ruin, which matters if you are selling or just tired of looking at it.
Roof work is where cutting corners gets expensive. Connor and Gabe handle it directly, fully insured, with the right equipment to treat the roof from the safest position possible. Quotes are free and usually booked the same week.
No, and you should not. Pressure strips the granules that protect asphalt shingles. We use a low-pressure soft wash that cleans safely.
Living algae that feeds on shingle filler. Our treatment kills it so it stops spreading and darkening the roof.
Most Seacoast roofs benefit from a soft wash every two to four years, sooner if you have heavy shade or moss.