PRO CLEAN REMOVES Those Streaks On Your Roof With
State Of The Art Commercial Equipment & Chemicals


Many homeowners have spent thousands of dollars replacing shingle roofs that could have
been restored to a like new appearance with simple low pressure cleaning. Those black
streaks on your roof are not signs of wear, but algae that can be pressure washed away
Remember that not every roof cleaning or pressure washing job is the same and the results
can vary depending on the condition of the existing roof shingles that are going to be
cleaned. No pressure cleaning and low pressure cleaning are very effective techniques for
cleaning roofs and can be done without causing damage to shingles.








For the most accurate assessment of achievable results, please submit your information at
our Request Free Estimate page and a representative will contact you to schedule an
appointment.

What Are The Black Streaks On My Roof?
Unsightly black stains or streaks on asphalt shingles are caused by a hardy type of algae
called Gloeocapsa Magma. The algae feeds on the crushed limestone that is used in asphalt
shingles. Rain spreads the algae down the roof causing the black streaks. These streaks are
not only unsightly but cause the shingles to fail prematurely by not allowing the shingles to
reflect heat properly.

50% Of Roofs Are Replaced Due To The Way They Look.

This is not because of their functionality. Half of the roofs ever replaced in the Midwest didn't
need replaced, only cleaned. Just as mold and mildew can grow on your vinyl siding, wind
blown algae can land and grow on your roof. Replacing your roof because of  this algae, is
like replacing your siding instead of having it cleaned; it just doesn't make sense.

Some roofing contractors don't know what these black streaks are, saying it's the asphalt
showing through the shingles or that it's water stains. Some contractors may know it's algae
but tell you it can't be cleaned without damaging the shingles. In either case, they may tell
you that the roof needs replaced. This is not true if your shingles are still in good shape. The
algae can be killed and removed properly without damaging the shingles using a low
pressure chemical application (recommended by shingle manufacturers).

Never use a pressure washer on an asphalt shingle roof, doing so will blow granules off the
shingles and lessen the longevity of your roof.

Roof Cleaning Is Recommended By Shingle Manufacturers.
Companies like Owens Corning and GAF, and also the Asphalt Roofing Manufacturers
Association recommend a low pressure chemical application using certain cleaners to
restore shingles suffering from roof algae, followed by a low pressure rinse. We use the
cleaners and methods recommended by these companies, for a safe and damage free roof
cleaning. If your shingles are still in good shape but have roof algae on them, having your
roof cleansed will allow you to get the full life out of your shingles, saving you thousands of
dollars.

Signs Of Aged Shingles Needing Replaced.
We do not recommend cleaning shingles that are in need of being replaced. If you're not sure
if your roof needs replaced or cleaned, here are some signs of an aged roof:

1) brittle or crumbling shingles
2) excessive amount of shingle granules in your gutters
3) bottom corners of shingles curled up
4) wavy, warped, or heaved shingles
5) very thin or loose shingles
If you are still unsure about the status of your roof, we will be glad to evaluate it for you. We
will not clean shingles that need replaced, because cleaning the roof won't solve the problem
if the shingles are aged. On the other hand, if you call a roofing contractor, you may not get
the whole truth and may be persuaded into replacing a roof that only needs cleaned.