Drone roof soft washing removes the single most dangerous part of the job: nobody ever walks the roof. Every year, falls remain the leading cause of death in construction and exterior work, and roofs are where most of them happen. The wet, algae-slick roof that needs cleaning is precisely the roof least safe to walk. For decades the industry’s answer was harnesses, anchors, and hope. Ours is simpler: nobody goes up.
Why roofs stain (and why it matters beyond looks)
Those black streaks running down shingles are Gloeocapsa magma, airborne algae that feeds on limestone filler in shingles and holds moisture against the roof surface. Left alone it shortens shingle life, degrades membranes, and in shaded areas graduates to moss and lichen that physically lift roofing material. Cleaning isn’t cosmetic; it’s asset preservation.
The old method’s problem list
Walking a roof to soft wash it means: fall protection anchors (often installed into the roof you’re protecting), foot traffic on brittle or granular surfaces (which manufacturers warn against), crews working on chemically slick slopes, and entire categories of roof (steep-slope, tile, tall church rooflines, standing seam in the rain) that crews simply decline or price like hazard pay, because it is.
How the drone does it
Our aircraft carry the soft-wash line to the roof and apply the same industry-standard chemistry a ground crew would use (low pressure, metered mix, proper dwell time), with a few advantages a person on a slope can’t match:
- Uniform coverage. Consistent standoff distance and overlapping passes mean no missed strips above the safe-footing line and no over-applied patches.
- Zero roof contact. No foot traffic on shingles or tile, no anchors drilled, no ladder rails crushing gutters.
- Any pitch, any height. A 12/12 slate roof and a low-slope membrane are the same mission profile from the air.
- Photo documentation. The aircraft’s camera captures before/after imagery of surfaces you’d otherwise never see.
Runoff, landscaping protection, and rinse management work exactly as in any professional soft wash, handled from the ground, where the whole crew stays.
What it costs
Roof soft washing by drone typically prices comparably to a conventional crew on an easy roof, and dramatically better than a conventional crew on a hard one, because “hard” for a climbing crew (steep, tall, fragile) is irrelevant from the air. Results last 2–4 years. See our general cost guide for how access drives price on any soft washing job.
If your roof has streaking, or your last contractor refused to touch it, send us a photo and the address. You’ll have a straight answer within one business day.
Questions this answers
Is it safe to walk a roof to clean it?
No. Falls remain the leading cause of death in construction and exterior work, and roofs are where most of them happen. Drone soft washing removes that risk entirely: nobody goes up.
Why do roofs get black streaks?
Those streaks are Gloeocapsa magma, airborne algae that feeds on limestone filler in shingles and holds moisture against the roof surface, shortening shingle life and degrading membranes if left untreated.
How much does drone roof cleaning cost?
Roof soft washing by drone typically prices comparably to a conventional crew on an easy roof, and dramatically better than a conventional crew on a hard one, since 'hard' (steep, tall, fragile) is irrelevant from the air. Results last 2–4 years.