Find a roof cleaning professional near Bellevue, WA

Find a roof cleaning professional near Bellevue, WA

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Find a roof cleaning professional near Bellevue, WA

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Top 10 Roof Cleaning Professionals near Bellevue, 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.

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.

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.

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 Bellevue roof cleaning professionals
Jennifer G.
When the only evidence that your roof was cleaned is a clean roof, you have to hire the company. Grace did a fantastic job on our roof with minimal need for my engagement. Highly recommend.
Grace Roof CleaningGrace Roof Cleaning
Ryan Z.
Did a good job cleaning the roof
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
Flat roof cleaning. Turned out excellent.
HighLand Fences LLC,HighLand Fences LLC,
Thumbtack Customer
Brian cleaned the moss on our roof and made minor repairs on our roof. He was prompt in making appointments and arrived when scheduled. Since we cannot go on the roof ourselves, he took pictures of the repairs needed on the roof, before and after. We would recommend him to anyone for moss cleaning and repairs.
B&M ConstructionB&M Construction
Thumbtack Customer
Jorge did a really good job cleaning our roof. He was on time, worked very hard & cleaned up afterwards. The roof looks like new shakes were put on! I would recommend him highly.
Proman ServicesProman Services
Thumbtack Customer
Jorge did an excellent job cleaning our roof. He was on time, worked very hard & cleaned up afterwards. Highly recommend. We'll hire him again.
Proman ServicesProman Services
Shuang Z.
Andrew was very easy to communicate with, he also helped me buy a chimney cap as it’s missing from my roof and installed it besides the roof cleaning. His price is decent, and his attitude is the difference maker. I would recommend.
Oneanddone LLCOneanddone LLC
Thumbtack Customer
Jorge did a good job in cleaning the roof, and the debris. He came early, got the job done quickly with no fuss. Highly recommended!
Proman ServicesProman Services
George D.
We have had other roof power washings over the years and found them to be just another job and did not leave things as clean and tidy as I would have expected. Leo Roof on the other hand was very professional, was on time, took great care to make sure everything was done properly and his work is excellent. He made sure everything around the house was cleaned up and did an even more than I expected. I would not hesitate to recommend him to any of my friends. I will certainly use him in the future when I need the roof cleaned again.
Diamond Pro RoofingDiamond Pro Roofing
Ben S.
Leo cleaned my roof well and did everything quoted. it was a thorough job and i would recommend! (just make sure you remove items to avoid them being soaked:-))
Diamond Pro RoofingDiamond Pro Roofing
Victor C.
Hi! Leo just cleaned my roof, very happy with his job, highly recommend Leo!! Well done Leo, see you next time. Thank you,Victor.
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
Russell responded to my bid request shortly after I posted it and he drove out to our home to provide an estimate that day. He scheduled and performed the work (roof and gutter cleaning) promptly and did a great job.
Northern ServicesNorthern Services
Eileen H.
I like to support quality, one-man enterprises like Leo's, and was happy with how marvelously clean my roof was when he was finished. There's a reason why Leo has so many 5 star ratings!
Diamond Pro RoofingDiamond Pro Roofing
Leena G.
We used their service for roof cleaning. They did an excellent job. Also their office person Renae is fantastic with following up and provinding details on the work and sending pictures of the products that would be used. Overall we had a good experience with their service.
The ProClean TeamThe ProClean Team
Girish B.
Leo did an exceptional job in cleaning my roof. He left it as though it was brand-new again. I will be using his services for years to come. Unmatched quality, fair pricing and professionalism—that’s what you get when you hire Leo!
Diamond Pro RoofingDiamond Pro Roofing
Lynn A.
Leo responded very quickly to my request! Within a couple of minutes I received quote and set a date. He high-pressure washed it roof of all the leaves and debris and cleaned up afterwards. Very happy with his service and quality of work. Will definitely use him again!
Diamond Pro RoofingDiamond Pro Roofing
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