Roof Washing (Soft Wash) in Johns Creek, GA

Dark streaks on a roof are usually algae (Gloeocapsa magma), not just dirt — common on shingle roofs in Johns Creek's humid Piedmont climate, and it spreads from roof to roof through airborne spores, so one streaked roof in a neighborhood often means others nearby will follow.

A soft-wash method uses low pressure — well below what a standard pressure washer produces — combined with a roof-safe cleaning solution to kill growth at the root, rather than blasting it off the surface. High-pressure washing on a roof can lift and crack shingles, drive water under flashing, and void a shingle manufacturer's warranty, which is why soft washing is the standard method for asphalt shingle roofs.

The cleaning solution is applied, given time to work into the growth, and then rinsed at low pressure. Because it kills growth at the root rather than just knocking visible buildup off the surface, a soft wash also slows how fast staining comes back compared to a plain water rinse.

Besides algae streaking, soft washing addresses general dirt and pollen buildup. Gutters and downspouts are often cleaned as part of the same visit since the runoff from a roof wash tends to carry debris into them.

A soft-washed roof looks better immediately and holds up better over the following year than a roof left untreated. Call for an on-site look and a firm quote — roof size, pitch, and the extent of the growth all factor into pricing.