Roof Cleaning

Find a roof cleaning professional near Bothell, WA

Find a roof cleaning professional near Bothell, WA

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Top 10 Roof Cleaning Professionals near Bothell, WA

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.

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.

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.

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.

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.

Reviews for Bothell roof cleaning professionals
Srikar R.
My roof and gutter has not been cleaned for close to 2 years. Diamond pro roofing dropped by in just a couple of days and cleaned roof and the home surroundings as well.
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
cleaned roof and gutters.
Johnston's, Inc., Clear N' Bright WindowsJohnston's, Inc., Clear N' Bright Windows
Murali R.
Cleaned the roof and all the debris.
Diamond Pro RoofingDiamond Pro Roofing
Damir V.
Diamond Pro Roofing did a good job cleaning my roof and gutters. Great job!!!
Diamond Pro RoofingDiamond Pro Roofing
Ravi V.
Leo did a great job at cleaning our roof. He was prompt in responding and getting the work done. Would recommend him for any roof or gutter cleaning.
Diamond Pro RoofingDiamond Pro Roofing
Anouar B.
Respond very fast and did a great job on cleaning my roof. Very professional. Cleaned everything after finishing roof. Great communication and punctual. I recommend.
Brave BuildersBrave Builders
Nirag T.
Did a great job on our house roof cleaning
Brave BuildersBrave Builders
Jill D.
Very good job roof cleaning n moss removal!!
Premium Solutions Exteriors LLC.Premium Solutions Exteriors LLC.
Thumbtack Customer
The workers did a good job. They worked steadily and the roof looks good. They cleaned the roof debris from our yard and deck. Very happy
Proman ServicesProman Services
Narasimhan G.
He did a thorough job with roof cleaning and window cleaning. Professional, punctual and neat job overall.
Bazere King cleaningBazere King cleaning
Yaswant V.
Leo's team did an amazing job in cleaning the roof and rain gutter.
Diamond Pro RoofingDiamond Pro Roofing
Cheryl S.
Diamond Pro roofing did a great communicating prior to the job and later a great job cleaning my roof and gutters, and treating for moss. They cleaned up everything very nicely! Would definitely hire them again!
Diamond Pro RoofingDiamond Pro Roofing
Ajay t.
They did a wonderful job. Their work ethics is great and my roof looks like a new. Without even being asked for they cleaned the debris fallen in the neighbors house too. I will definitely recommend them anyday for the roof cleaning.
Brave BuildersBrave Builders
Udish V.
Leo is very professional and has exceeded my expectations on my roof cleaning. He has not only done an outstanding job cleaning the roof and gutters but also power washed my porch, deck and drive way so that the house looks clean. After the cleaning, my house looks very clean and new. Thanks Leo for the great work.
Diamond Pro RoofingDiamond Pro Roofing
Sriharsha K.
Did an excellent job cleaning roof, gutters and down spouts. Would Highly recommend
Diamond Pro RoofingDiamond Pro Roofing
Louise D.
He did a great job cleaning our roof. Before and after photos attached.
Brave BuildersBrave Builders
Carrie C.
Had them clean our roof. Did a great job. Friendly, professional and punctual.
The ProClean TeamThe ProClean Team
Thumbtack Customer
Hired for roof cleaning/moss removal. Did great job and came in under bid.
Proman ServicesProman Services
Joe H.
They arrived right when they said they would, did a phenomenal job cleaning the roof, and cleaned up all the debris from the ground afterward.
MV construction and cleaning services LLCMV construction and cleaning services LLC
సుబ్బారావు గ.
Leo’s team did a good job with cleaning the roof. They were responsible enough to clean up all the debris after job. Will recommend
Diamond Pro RoofingDiamond Pro Roofing
Robyn O.
Did exactly what was promised. I am very happy with my clean roof and gutters!!
Proman ServicesProman Services
Heidi N.
Great job very happy with my roof anf gutter cleaning very professional and efficient
J&J Do It All ServicesJ&J Do It All Services
Medha S.
Overall excellent work. He was friendly, professional and did amazing job. Good attention to details. He helped us with Roof low pressure wash, Moss removal, Gutters and Downspouts cleaning, Moss treatment and he also Cleaned everything that fell from the roof. Highly recommend.
MV construction and cleaning services LLCMV construction and cleaning services LLC
Thumbtack Customer
Jorge did a great job! He was very helpful fixing the valleys on my tile roof. My 'retired' neighbor watched the whole process and was so impressed he is having Jorge clean his roof!
Proman ServicesProman Services
Thumbtack Customer
Jorge did an amazing job cleaning a very difficult roof. He also identified issues that could have been large problems down the road and had solid solutions. Will be my go to for windows and roof support.
Proman ServicesProman Services
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