Roof Washing (Soft Wash) in Magnolia, TX

Dark streaks on a roof are usually algae (Gloeocapsa magma), not just dirt — common on shingle roofs in Texas's humid 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 algae and moss 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 algae and moss, and then rinsed at low pressure. Because it kills algae at the root rather than just knocking visible growth off the surface, a soft wash also slows how fast the staining comes back compared to a plain water rinse.

Besides algae streaking, soft washing addresses moss growth (common on shaded, north-facing roof sections) and 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 staining all factor into pricing.