Roof Cleaning Chester County PA

What are those black stains on my roof?
It is a type of algae that feeds on your limestone filler in your shingles.

How come I've never seen that black stuff on my roof until the past few years?
The particular type of algae that feeds on your shingles migrated from the Gulf states 6-7 years ago, which is why most North sides of roofs have those blacks stains in our area.

Do you use a pressure washer to remove those stains?
NO. We don't use low pressure or surface cleaner either. We use a roof pump specifically designed to gently remove the algae from your shingles without removing those little granules on them.


Premier Power Wash & Roof Cleaning specializes in soft washing and non pressure roof cleaning. We  are fully insured and proudly serve all of Chester County and Delaware County PA.

Call 610-220-3590 for a FREE estimate.

 Roof Cleaning Wayne PA

Roof Cleaning West Chester, PA

Roof Cleaning Malvern PA 19355

Premier Power Wash & Roof Cleaning safely removed the black streaks from this beautiful home in Malvern, PA using non pressure roof cleaning. We also cleaned the algae from the stucco chimney by soft washing, the safest and most effective way to clean many surfaces.

We specialize in residential and commercial roof cleaning and power washing and proudly serve Chester County & Delaware County, PA  for all your exterior cleaning needs.

Call (610) 220-3590 for a FREE estimate.

"Our goal is to provide exceptional service at a reasonable price." Mike Trafficante (owner)

roof cleaning malvern pa 19355

Roof Cleaning Chadds Ford, PA 19317

Premier Power Wash & Roof Cleaning removed the black stains from this home using non pressure roof cleaning, the industry standard (RCIA) and recommendation of ARMA.

The homeowners were thrilled to see the black streaks disappear at a cost that was only fractions of replacing their roof. These pictures were taken one week apart, and this is the safest way to ensure the longevity of your shingles as we never use a surface cleaner or pressure washer. Doing so will remove those little granules that are on your shingles and will shorten the lifespan of your roof. Typically, a roof like this one will go 4-5 years without seeing the algae reappear.

Call (610) 220-3590 for a free estimate on all your exterior cleaning needs this Spring.

What are those black stains on my roof?

The roof stains or black streaks that you see on your roof is simply an algae that's using the limestone filler in your shingles as a food source. I live in West Chester, PA and bought my first home in 2002. Never do I remember any black stains on my roof or any of my neigbors homes. Being in the exterior cleaning business, I quickly began to notice these stains starting to appear on the northern side of many homes in Chester & Delaware County PA. After researching the issue, I learned that this was always a problem in the Gulf states, but with the moisture and humidity in recent years, this type of algae has unfortunately found a home here.

My first instinct was to simply take a pressure washer to it, but that would obviousely remove those little granules that are on the shingles and would actually shorten the lifespan of the roof. I then found out through ARMA, which is the Asphalt Roofing Manufacturers Association, the proper way to remove the algae from the shingles.

There are several ways to clean a roof, but it quickly became apparent that for immediate results, it's best to use the suggested method of cleaning that the shingle manufacturers (GAF, Ownes Corning, etc.) recommend. In addition, the Roof Cleaning Institute of America certifies its members under the condition that they only use this roof cleaning system. It produces immediate results, which typically lasts 3-5 years, and until we hear of an alternative method that produces the same results, we'll continue to follow the ARMA and RCIA guidelines.

Mike Trafficante - owner of Premier Power Wash & Roof Cleaning