Most roof contractors do not want you to know that your dirty roof shingles are dirty and need to be cleaned, not replaced. If you see black streaks on your roof, mold, mildew, lichens or moss, call Westchester Power Washing at 914-490-8138 first. More than likely, your dirty roof needs to be soft washed. Soft washing your roof will remove black streaks, mold, mildew, lichens, moss and of course, dirt.

dirty roof, roof cleaning, house cleaning, roof soft wash, roof clean, dirty roof, before and afterOften times homeowners think a dirty roof needs to be replaced. If you call a roof contractor first, more than likely they will tell you to replace your roof. Why? Roof contractors are in the business of replacing roofs, not cleaning roofs. Furthermore, roof replacement can cost as much as ten times the price of having your roof cleaned. If your roof is not more than 25 years old, then you may just need to have your roof professionally cleaned.

Black streaks are caused by  roof algae. The technical term for roof algae that cause the black streaks on your roof is Gloeocapsa Magma. Algae feeds on the crushed limestone used in asphalt shingles. As rain washes down your roof, it spreads algae down your roof causing the black streaks you see. Black streaks cause shingles to fail prematurely by not preventing the shingles from reflecting heat properly.

Research has shown 50% of dirty roofs are replaced because of black streaks not because they are damaged.

Unfortunately, when homeowners see a dirty roof, they think it is time to replace their roof. This is usually not true. Research has shown more than half the roof replaced in Westchester County, NY were replaced because of how they look and not because of their condition. Simply put, more than 50% of roofs need to be professionally washed, not replaced. In fact, this means, that people who replace their roof have simply wasted their money.

Roofs in Westchester, Putnam and Dutchess County, New York experience a lot of humidity, rain and snow. This moisture promotes algae to growth on the roof. The algae creates the black streaks and the roof looks dirty, old and damaged. As stated before, this is just a dirty roof not a roof in need of replacement.

We have cleaned roofs in Scarsdale, Armonk, Katonah, Bronxville, Tarrytown, Chappaqua, Briarcliff Manor and Croton on The Hudson since 1990. During this time, we have restored many roofs by soft washing them with our eco-friendly cleaning solution, PRior to our coming out to wash the roof, these homeowners were told they needed to replace the roof. By having Westchester Power Washing wash and clean their roofs, these homeowners saved thousands of dollars over the cost of roof replacement.

How do you know when a dirty roof need to be washed or replaced?

dirty roof, roof cleaning, black streaks, mold, mildew, fungus, westchester, armonk, chappaquaJust as mold and mildew grows on your vinyl siding, wind blown algae lands and grows on your roof. Replacing your roof because of this algae is like replacing your siding or wood deck because it is dirty instead of having us pressure wash it clean. Remember, your home’s exterior just like the interior needs to be washed and cleaned. When your house exterior, patio, deck, roof, siding, fence, outdoor furniture get dirty, a home exterior pressure washing company, like Westchester Power Washing can save you lots of money being cleaning not replacing.

Most roof contractors do not know the difference between a dirty roof with algae and black streaks versus a roof in need of repair or replacement. Roof contractors are in the business of selling roofs, not cleaning roofs. Also, some roof contracting companies simply do not know that the roof is just dirty because they are not educated in the proper maintenance of roofs which includes roof washing.

If you are thinking about replacing your roof because it is dirty, your see black streaks or your roof looks faded, call Westchester Power Washing first at 914-490-8138. We will take a look at your roof and give you a FREE roof cleaning and washing estimate. While there we can also see if your siding, deck, patio, fence, walls, or pavers needs pressure washing. If so we will provide you with a FREE complete exterior house washing quote.

What are the signs of a dirty roof that need to be replaced?

To being with, never use a pressure washer on an asphalt shingle roof. A pressure washer will damage the granules on your shingles and lessen your roof’s life and longevity.

Roof shingle manufacturers like Owens Corning and GAF as well as the Asphalt Roofing Manufacturers Association recommend a soft wash method to restore shingles with roof algae,. Westchester Power Washing uses the cleaners and methods recommended by these companies, to provide you with a safe and damage free roof washing and cleaning.

If your roof shingles do need to be replaced, we can recommend a reputable roof contractor if you need one. We do not recommend cleaning shingles that are in need of being replaced. As our customers in Westchester, Putnam and Dutchess County, NY can attest, we believe true customer service starts with being honest first.

dirty roof cleaned, westchester pressure washing, before and after, blogThis way, when a homeowner recommends Westchester Power Washing for roof washing, house and siding washing or our deck, patio or fence pressure washing services, they know they are recommending a professional, caring company to their neighbors, friends and family.

If not sure if your roof shingles need replacement or need cleaning, below are some signs of an aged roof in need of replacement.

1) dry rotted, brittle or crumbling shingles
2) excessive amounts of shingle granules in your gutters, sidewalk or landscape
3) notice the bottom corners of shingles are curled up, twisted or lifting up
4) warped, wavy or heaved shingles
5) shingles are thinning out or are loose or falling off


If you see your roof exhibiting these conditions, you roof is in need of repair and maybe full replacement.

If you are cannot see your roof or are not sure about what we just described, and you are thinking about whether you should wash or replace your roof, give Westchester Power Washing a call.

We will come out to your home and see if you washing your roof will be the best option. Westchester Power Washing never washed a roof that needs to be repaired or replaced. We will give you our professional opinion if we think cleaning your roof is not safe nor worth your investment.

Westchester Power Washing is a licensed and insured house exterior cleaning company. We wash and clean roofs, houses, siding, decks, patios, fences and outdoor furniture. We have been pressure washing homes for almost 30 years. Westchester Power Washing is a 5 Star Google Rated, Yelp and consumer review home pressure washing company.

Our services include pressuring wash homes, dirty roofs and siding throughout Westchester, Putnam and Dutchess County, NY..

We pressure wash homes, roofs, decks, patio and fences in the following towns and zip codes. If you live in on near these towns, then call Westchester Power Washing for a FREE estimate or to book us today at 914-490-8138. Our main website is and .

algae, growth, dirty roof, westchester, putnam and dutchess county ny, westchester power washingAmawalk,NY 10501, Ardsley,NY 10502, Armonk,NY 10504, Bedford,NY 10506, As well as, Bedford Hills,NY 10507, Bronxville,NY 10708, Buchanan,NY 10511, Carmel(Kent),NY 10512, Cortlandt mnr,NY 10567. Croton on Hudson,NY 10520, Cross River,NY 10518, Dobbs Ferry,NY 10522, Eastchester,NY 10709, East Fishkill,NY .

In addition to, Elmsford,NY 10523, Garrison,NY 10524, Goldens Bridge,NY 10526, Granite Springs,NY 10527, Harrison,NY 10528, West Harrison,NY 10604, Hastings on Hudson,NY 10706, Hartsdale,NY 10530, Hawthorne,NY 10532, Holmes,NY 12531, Hopewell Jct,NY 12533. As well as,  Irvington,NY 10533, Katonah,NY 10536, Lagrangeville,NY 12540, Larchmont,NY 10538, Mahopac,NY 10541, Mamaroneck,NY 10543, Millwood,NY 10546, Mohegan Lk,NY 10547.

Also, Montrose,NY 10548, Mt. Kisco,NY 10549, New Rochelle,NY 10804, N Salem,NY 10560, S. Salem,NY 10590, Ossining,NY 10562. As well as, Patterson,NY 12562, Pawling,NY 12564, Pleasantville,NY 10570, Poughquag,NY 12570, Pound Ridge,NY 10576, Purchase,NY 10577, Putnam Valley,NY 10579.

Furthermore, Rye,NY 10580, Rye Brook,NY 10573, Scarsdale,NY 10583, Shrub Oak,NY 10588, Sleepy Hollow,NY 10591, Stormville,NY 12582. And,  Tarrytown,NY 10591, Thornwood,NY 10594, Tuckahoe,NY 10707, Valhalla,NY 10595, Waccabuc,NY 10597, Wappinger Falls,NY 12590, White Plains,NY, 10601,10602,10603,10604,10605,10606,10607, Yorktown Heights 10598.

To contact Westchester Power Washing online, please go to our contact us page located here.

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If you are searching for pressure cleaning near me or searching for roof or house washing near me and you are in Westchester, Putnam or Dutchess County NY- Westchester Power Washing is always near you for roof, house, patio, deck, siding, fence and outdoor furniture cleaning.