Greenwood · Ninety Six · Saluda · Abbeville
Soft wash roof cleaning in Greenwood, SC
Those black streaks running down your shingles are algae — and in the humid Upstate summer they spread fast. Soft washing removes them at low pressure, without tearing the granules off a roof that still has years of life in it.
Why Upstate roofs get black streaks
The dark stains on asphalt shingles are a blue-green algae called Gloeocapsa magma. It feeds on the limestone filler in modern shingles and thrives in exactly the conditions we have around Greenwood County: long humid summers, afternoon thunderstorms, and heavy tree cover on north-facing slopes that stay shaded most of the day.
Left alone, the algae mat holds moisture against the shingle surface. That extra heat and damp accelerates granule loss, and on shaded slopes it opens the door to moss and lichen, which root into the shingle mat and lift the edges. It is not just cosmetic — it shortens the life of the roof and it is one of the first things an appraiser or home inspector notices.
The good news: a streaked roof is usually a clean-and-keep situation, not a replacement. We will tell you straight which one you are looking at.
Soft wash vs. pressure washing your roof
We never pressure wash an asphalt shingle roof. Here is the difference, and why it matters to your warranty.
Pressure
Soft wash: about 100 PSI — similar to a garden hose
Pressure washing: 1,500–4,000 PSI
Granules
Soft wash: shingle granules stay bonded
Pressure washing: strips granules and shortens roof life
Results last
Soft wash: kills algae at the root, stays clean longer
Pressure washing: surface only, streaks return quickly
Warranty
Soft wash: the method shingle manufacturers accept
Pressure washing: can void material and workmanship coverage
This matters on our own work too: high-pressure washing an asphalt roof can void both the CertainTeed material warranty and our 10-year craftsmanship warranty. Soft washing keeps both intact.
How our roof cleaning works
Inspect first
Before anything gets wet we walk the roof and check shingle condition, flashing, and vent boots. If the roof needs repair instead of a wash, we tell you.
Protect the property
Landscaping, foundation plantings, and gutters get pre-wet and rinsed so the cleaning solution never sits on your shrubs.
Apply low pressure
A soft wash solution is applied at roughly garden-hose pressure and left to dwell, killing the algae at the root rather than blasting it off.
Rinse and check
We rinse, clear the gutters of loosened debris, and re-walk the roof so you can see the difference from the driveway.
Common questions
How often should a roof be soft washed in South Carolina?
Most Greenwood-area homes go about three to five years between washes. Roofs under heavy oak or pine cover, or on a shaded north slope, tend to streak again on the shorter end of that range.
Will it hurt my landscaping?
No. We pre-wet and rinse plantings around the house before and after the wash so nothing sits on your shrubs or grass.
Can you clean a metal roof?
Yes. Standing seam and metal panel roofs clean up well with the same low-pressure approach, using a solution matched to the finish so the coating is not dulled.
What if the roof turns out to be worn out?
Then we say so. We inspect before we wash, and if the shingles are brittle, curling, or losing granules by the handful, cleaning is throwing money at a roof that needs replacing. You will get an honest answer and a written estimate either way.
Which towns do you clean roofs in?
Greenwood, Ninety Six, Saluda, Abbeville, Clinton, Simpsonville, and the surrounding Upstate communities.
Get those streaks off your roof
Free estimate, no pressure — from a Greenwood roofer who will tell you if a wash is the wrong call.
Request Your Free Estimate