Residential Service
Roof Soft Washing
Low-pressure roof cleaning that removes black streaks without damaging shingles.
from $0.20/sqft
Stand in the driveway and look up, and the streaks are hard to miss—dark, almost sooty lines running down from the ridge toward the gutters, like something was poured out at the peak of the roof. It isn't soot or dirt. It's gloeocapsa magma, an airborne algae that lands on the shingles, feeds on the limestone filler baked into them, and spreads a little further with every rain. In a climate as humid as Tomball, Cypress, and Spring, almost every roof gets it eventually—the question is just how long you let it sit.
Why We Soft Wash Instead of Blasting Shingles
Where roof cleaning goes wrong is when someone shows up with a pressure washer and treats shingles the same way they'd treat a driveway. Direct high-pressure spray strips away the granules that protect asphalt shingles from UV light, and once those granules are gone, they're gone for good—along with, often, your manufacturer's warranty. As a power washing company that works on roofs every week, we do the opposite: we soft wash. Low-pressure equipment carries a biodegradable cleaning solution onto the shingles, gives it time to actually break down the algae and moss at the surface, and lets the chemistry do the work instead of the force.
Covering AC Units and Clearing Gutters First
Before any of that happens, we cover air conditioning units, confirm the gutters and downspouts are clear, and pre-wet the landscaping along the drip line so nothing below the eaves takes on cleaning solution it doesn't need. The rinse afterward stays low-pressure too, both to protect the granules and to keep runoff from overwhelming a flowerbed that's directly in the path of a two-story roofline.
Will Those Streaks Come Back?
We're not going to tell you the streaks will never come back—algae is part of living here—but a proper soft wash slows the regrowth substantially and keeps your roof looking the way it did the day it was installed for a lot longer than a bare rinse would. If something isn't sitting right once we're packed up, we'll come back and make it right, no argument, because that's what our 100% satisfaction guarantee is actually for.
Our Process
How It WorksStep By Step
- 1
Ground and roof-level inspection
We check the whole roofline for black streaking, moss, and lichen, note any loose or lifted shingles, and flag skylights, vents, and flashing so we know exactly what to work around before we start.
- 2
Cover, tarp, and pre-wet
AC units get tarped, gutters and downspouts get checked for flow, and we pre-wet the shrubs and beds along the drip line so nothing below the eaves absorbs cleaning solution.
- 3
Low-pressure soft wash application
An eco-friendly, biodegradable solution goes on with low-pressure equipment, not a pressure washer wand—it needs a few minutes of dwell time to break down algae and moss at the root, not just on the surface.
- 4
Light rinse and runoff check
We rinse at low pressure to carry the solution and dead algae off the roof and out of the gutters, then check the ground and landscaping on our way out—backed by our 100% satisfaction guarantee.
Where We Work
Roof Soft Washing Near YouNorth Houston & Beyond
Questions
Frequently Asked Questions
Why does my roof have dark streaks running down the shingles?
Those streaks are almost always gloeocapsa magma, an airborne algae that feeds on the limestone filler in asphalt shingles and spreads by wind, rain, and birds. It's extremely common in humid climates like North Houston, and it's a cosmetic and shingle-health issue, not a sign your roof is failing.
Why soft washing instead of pressure washing the shingles?
High-pressure equipment can blast away the protective granules that shield asphalt shingles from UV damage, and once those granules are gone they don't grow back. Soft washing uses low pressure and a cleaning solution to lift algae and moss without touching the granule layer, which is also what most shingle manufacturers require to keep a warranty valid.
Will soft washing shorten my roof's lifespan?
No—done correctly, it extends it. Algae and moss trap moisture against the shingle surface and accelerate wear over time, so removing that buildup with low pressure actually protects the roof rather than stressing it. The risk of damage comes from high-pressure blasting, which we don't use on shingles.
Will the cleaning solution hurt my gutters, plants, or landscaping?
No. We pre-wet the beds and shrubs closest to the roofline, check that gutters and downspouts are clear before we rinse, and use a biodegradable solution formulated to break down safely. If you have a garden bed you're especially protective of, point it out and we'll cover it directly.
How long does roof soft washing take?
Most single-family roofs in Tomball, Cypress, and Spring take two to three hours from setup to final rinse, depending on roof size, pitch, and how much algae or moss has built up. Steep or cut-up rooflines can run longer, and we'll walk you through the timeline when we quote the job.
How often should I have my roof soft washed?
Most North Houston roofs do well on an eighteen-to-24-month cycle. Roofs with heavy tree cover or a north-facing slope that stays shaded hold onto moisture longer and tend to grow streaks back faster, so we'll give you a straight recommendation based on what we actually see up there.
Do you clean roofs in the rain or Texas summer heat?
We hold off on rain for safety and so the solution isn't diluted before it can work, but summer heat doesn't slow us down. We build our schedule around the weather, so an appointment might shift a day rather than get rushed.
