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Find a roof cleaning professional near Lake Oswego, OR

Find a roof cleaning professional near Lake Oswego, OR

12 near you

Find a roof cleaning professional near Lake Oswego, OR

12 near you

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Top 10 Roof Cleaning Professionals near Lake Oswego, OR

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Q & A

Answers to commonly asked questions from the experts on Thumbtack.

How often should you clean your roof?

Some roof cleaning companies recommend that you clean your roof every couple of years, but you might need to do maintenance every year depending on the type of roof you have, the climate and the weather. Roofs in harsher climates tend to require more frequent cleaning.

Can a roof be cleaned?

Yes roofs can be cleaned, and yes, it’s a real thing. Roof cleaning may actually be a wise investment to prolong the life of your roof. Overgrowth of moss, grime, lichen or algae can all shorten the life of your roof. If you have black streaks growing on your roof, they are likely caused by gloeocapsa magma algae spores that have landed on your roof and taken up residence. Once the algae has grown into streaks, the organism has usually been growing for several months and it’s high time to have it removed. If you live in a rainy part of the country, such as the Pacific Northwest, there’s a good chance you’ll find moss growing on your roof at some point. The northern part of your roof, as well as any parts that remain shaded all day, will provide a wet, cool haven for moss to flourish. Unfortunately this water-absorbing moss can damage your shingle roof, leading to rot if not removed. Beyond roof health and function, a clean roof can boost your curb appeal and potentially boost your home’s resale value. The national average for roof cleaning costs ranges between $270 and $350, although prices can be higher depending on how large your roof is, how steep your roof is, and what type of cleaning is necessary. Typically pros use either a pressure wash or chemical wash (made with a concentrated bleach solution) to remove algae, lichen, moss and dirt.

Why do I need to clean my roof?

Over time, algae, moss, lichen, dirt and even salt (if you’re near the ocean) can build up on your roof. These buildups can affect the look and function of your roof unless removed. The buildup of organic materials such as moss on a shingle roof can prevent water from sloughing off as it normally would. Trapped water can rot the roof or cause early deterioration of your shingles. Even if you don’t have a shingle roof, moss and lichen absorb water, and that wet material adds weight and stress to your roof — as well as providing a home for insects and other pests, and collecting dirt. For reflective, cool roofs that redirect heat away from the home, algae and moss growths can hamper their ability to deflect the sun, which can affect utility bills. Visually, moss, dirt and algae growths on a roof can have a negative effect on perceived home value and curb appeal. For example, black algae streaks on your roof may cause a potential homebuyer to assume that the roof might need repair or replacement, when it only needs to be cleaned.

Is it worth it to hire a roofer?

There are several reasons why it’s worth it to hire a professional roofer instead of attempting it yourself. The first is safety. Roofing is inherently dangerous, as a fall from a roof could seriously injure or kill you. Roofers have specialized equipment and training to help prevent accidents.  

Next is experience. Roofers know how to spot problems (leaks, missing shingles, moss or mold growth, etc.)  in your roof that could potentially save you from costly repairs down the road. 

And finally, roofers save you time by getting the job done quickly and with a high degree of quality.

What chemicals are used to clean roofs?

Roof cleaning is done to remove moss, lichen, algae, and buildup of other grime and dirt. There are several methods for roof cleaning, which can include a chemical soft wash, pressure washing, low-pressure washing and hand washing. When a chemical soft wash is used, a bleach mixture is sprayed onto the roof. The bleach-based solution is absorbed by the algae or moss, which dies from exposure to the chemical. The roof is then sprayed with a low-pressure rinse of water, which loosens the now-dead material, allowing it to slide off the roof.

For homeowners, the Asphalt Roofing Manufacturers Association recommends a mixture of 50 percent laundry-strength liquid chlorine bleach and 50 percent water. Professional roof cleaning companies will use an industrial mixture that is still safe but may be more effective in eliminating algae and moss growths. Asphalt shingle roofs are the most common type of roof, but each roofing material will have its own cleaning needs, so it’s best to consult with your roofing pro before diving in. Don’t do it yourself unless you can safely navigate your roof, the chemicals and a sprayer system. When in doubt, leave it to the pros.

How much does it cost to clean a roof?

The national average for roof cleaning costs ranges between $270 and $350. Factors that can affect the cost to clean your roof are the height of your house, the size and pitch (steepness) of your roof, and the complexity of your roof’s design and accessibility. Geographic location also plays a role in roof cleaning costs as regional labor rates and area costs to do business will vary. There are several ways to clean a roof. The most common is pressure washing. Industrial pressure washers can spray over 3,000 pounds per square inch (psi) of water — which is much too powerful for roof cleaning, and may tear off shingles and damage your roof. Confirm that the roof-cleaning pro you choose will only use a low-pressure sprayer to protect your roof investment. For large algae or moss growths, pros often recommend a combination of low-pressure washing with a bleach-based chemical solution. This is referred to soft washing and should handily remove any growths taking over your roof.

Reviews for Lake Oswego roof cleaning professionals
Annika L.
Excellent! They cleaned our roof, skylights, and installed gutter shields. Will definitely be using again.
Jennifer B.
Terrific! Thanks for helping my parents with their roof cleaning. Would highly recommend your services!
MJB Exterior CleaningMJB Exterior Cleaning
Chris S.
Dmitriy did a great job cleaning our roof and gutters and worked his tail off. Everything looks newer and updated thanks to his cleaning. Highly recommended!
Precision Clean Pressure WashingPrecision Clean Pressure Washing
Thumbtack Customer
Dennis did a great job. We hired him to clean the roof and gutters. After looking at the house he suggested two different options considering the condition of the roof which definitely fit the bill. We are very pleased and highly recommend his services. We actually will hire him again to clean our carpets.
AAA Action Fast Services Inc.  Cleaning Roof's ...AAA Action Fast Services Inc. Cleaning Roof's ...
Barbara B.
Dennis is a real professional. He took photos and worked up a plan before making a bid. He worked like a youngster, even after dark up on our third level roof! I would heartily recommend his work to anyone needing roof or gutter cleaning. He has a process whereby he actually scrubs the roof rather than using a power washer. He cleaned up every bit of debris. We will 100% use him again.
AAA Action Fast Services Inc.  Cleaning Roof's ...AAA Action Fast Services Inc. Cleaning Roof's ...
Thumbtack Customer
Roof cleaned of moss and other debre. Excellent work; dilegent and through. Would use again and recommend to anyone. Don Bulow Lake Oswego
AAA Action Fast Services Inc.  Cleaning Roof's ...AAA Action Fast Services Inc. Cleaning Roof's ...
Rama B.
Ian is extremely professional and has a great work ethic. He is punctual, responsive, and provides great value for money. I have worked with Ian on multiple occasions and have no hesitation recommending Ian for your roof cleaning project.
Tobias Exterior CareTobias Exterior Care
Sharlee O.
Jorge did a wonderful and meticulous job cleaning our roof and gutters. He is courteous and kind. Showed up on time and made the entire process simple and easy. We will be utilizing his services again and recommending him to others. Thank you Jorge!
JP Home Maintenance Pressure washingJP Home Maintenance Pressure washing
Thumbtack Customer
This was my first time using Thumbtack. Dennis provided a quick and detailed response to my inquiry along with links to his website that included photos and videos of the work he performs. He stopped by my house the same day to provide me with literature of the method he uses and to get on the roof of my 3-story home to assess the moss and take photos. The following day i had a detailed photo .pdf of what work needed to be done along with a quote. I decided to hire him and the next day he stopped by with the contract and to unplug my downspouts that i doubt had ever been cleaned. Two days later (today) he performed the remainder of the job using his environmentally- and asphalt shingle-friendly method and all of the moss on my roof magically disappeared. He was here all day long and cleaned up after himself. Dennis is passionate about his work and i can tell he really cares about his performance and reputation based on the fantastic communication, fast service, and caring attitude. I will hire him to maintain my roof and would recommend him to anyone. Reasonably priced, excellent service, professional!
AAA Action Fast Services Inc.  Cleaning Roof's ...AAA Action Fast Services Inc. Cleaning Roof's ...
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