Roof Cleaning

Find a roof cleaning professional near Sammamish, WA

Find a roof cleaning professional near Sammamish, WA

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Top 10 Roof Cleaning Professionals near Sammamish, 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 Sammamish roof cleaning professionals
Tristan S.
I hired MS Cleaning to clean my roof and solar panels and they did a great job. It is often hard to find pros that will work on my roof for a good price since it is a standing seam metal roof, but MS Cleaning bid a very fair price (not the lowest but almost the lowest) and I was comfortable hiring them since they already had experience cleaning metal roofs and solar panels based on their project photos.
Brave BuildersBrave Builders
Keerthi D.
What an amazing job Ken has done to clean our roof! They have worked non stop for several hours and got it cleaned in a day. I would call them every time I need roof cleaning.
Ken cleaning services LLCKen cleaning services LLC
Jisi K.
Rodrigo did a very good job on my roof cleaning and my drive way cleaning. He did it in a very neat and clean way. I am so happy on his work and I recommend to hire Rodrigo for Roof/drive way cleaning
RNG PaintingRNG Painting
Eng C.
Bruno responded really fast. And he sent someone to get my roof cleaning the immediate next day that is not raining. His price is good too. Only thing is that they didn’t clean up the surrounding of my house very well after the roof cleaning.
🏠Excelencia  Services🏠🏠Excelencia Services🏠
Thumbtack Customer
Did a great job cleaning the roof! clean up of mess was also done well. Wish they could have taken the mess with them!
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Jim M.
MV Construction and Cleaning Services did an awesome job cleaning my roof. I highly recommend them and look forward to working with them on a regular basis to maintain both my roof and gutters. Very professional and got the job done throughly. Very satisfied.
MV construction and cleaning services LLCMV construction and cleaning services LLC
James C.
I had specific questions on my request for proposals and Leo was the only contractor that answered the question. They took their time cleaning the roof and it was important to us that the place not be left a mess, specifically that our neighbors were not impacted by the mess. They cleaned up the area beofre leaving and did a great job cleaning the roof and my request to replace a missing ridge cap.
Diamond Pro RoofingDiamond Pro Roofing
Kathryn D.
Leo was on time and did an EXCELLENT job cleaning my home’s roof and gutters. We will definitely hire him again!
Diamond Pro RoofingDiamond Pro Roofing
Pawan T.
Bruno was prompt to reply, and on time for appointment. He also cleaned all the wall and windows after roof to get rid of dirts.
Bazere King cleaningBazere King cleaning
Ken X.
They have done very great job. We moved in the current house in Feb 2020 and have never cleaned our roofs and gutters since then. There were a lot of pine needles, leaves and dirt. They arrived a bit earlier than the appointment time and finished the job right around the estimated time. And the roofs and the gutters are as clean as brand new. Thanks!
Brave BuildersBrave Builders
Mohammad N.
I have used this company for roof moss removal and treatment service. I cannot express in word how happy I am with their service. They did an excellent job. 2 people spent about 7 hours, to gently pressure (low) wash the roof and remove all the moss, apply moss treatment, clean the gutters and clean everything that fell from the roof. The cost was very reasonable compared to the quality of the work. I highly recommend their work. I will use them from now on and definitely will refer to my friends. Thanks MV construction and cleaning llc !
MV construction and cleaning services LLCMV construction and cleaning services LLC
Kevin H.
Pedro was professional, polite, and on time. He cleaned our roof thoroughly and made it look like new. Will certainly work with him again!
MV construction and cleaning services LLCMV construction and cleaning services LLC
Hailun W.
What a wonderful job MV did on my roof! It’s so clean and shiny now. He works fast and left no mess behind!
MV construction and cleaning services LLCMV construction and cleaning services LLC
Riyaz P.
Would recommend Marcos, he did an excellent job of cleaning the roof and installing leaf guards. He was punctual and committed to doing a thorough job.
MV construction and cleaning services LLCMV construction and cleaning services LLC
Casey E.
Leo did an excellent and very thorough job cleaning our cedar shake roof and gutters. Looks like new again. Great job cleaning up afterward too. I would hire him again.
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
Pedro responded very quickly and did a good job cleaning the roof for a reasonable price. I am satisfied with the service and recommonded him to neighbors in next door.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Thumbtack Customer
Pedro and his brother have done excellent work to clean the roof and gutters. In addition they found a loose gutter and fixed it. Very responsive and reliable company. Strongly recommend to the east side neighbors.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Pankaj T.
Jose was very professional during negotiations and during the job. He explained the roof cleaning and treatment options very well and shred before and after pictures. The value is the best I found in my search by a good margin.
Goodbye mossGoodbye moss
Prasad G.
Bruno is a professional - showed up on time and worked diligently pressure washing our cedar shake roof. Minor issues were quickly and politely resolved prior to leaving. Cleaned up nicely after the job - highly recommend!!
Bazere King cleaningBazere King cleaning
Kamlesh N.
Ismail was very responsive, provided quick quote for roof and patio wash/cleaning, and got the work scheduled. Not only did he start quickly on the job, he was also proactive on pointing out what is missing and he send me pictures during the job and I was able to address additional needs. He treated the job like an owner and called out on a roof that I was not considering to clean, gave a very reasonable quote and immediately got it done as part his job. When I pointed out that a portion was left, to my surprise he showed up and got it done so quickly.
Supreme Cleaning & PaintingSupreme Cleaning & Painting
Thumbtack Customer
The work crew arrived as scheduled, did a great job cleaning a complicated roof and gutters with many gables. The pressure washing of the cement deck and attached sidewalks came out looking like new. They had all of the equipment and expertise needed for this job and their performance was outstanding.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Fang F.
100% recommended! I filled the contact form and they contacted me and made a on site free estimation at the same day with a very reasonable quote. They had opening in the same week and did a fantastic job cleaning cleaning 5 year moss off out of my roof and gutters and concretes , bricks , path, drive way around the house . Very friendly and professional. Will definitely use their services again.
Brave BuildersBrave Builders
Sybil B.
A+ on all counts. From posting my inquiry to completed job, it was 3 days. Thorough on site assessment before giving a bid, flexible in negotiating price and scope of work, timely arrival for job, worked a full 7 hour day to blow off roof and clean gutters. No surprises and a great job well done! Will definitely use them again.
Diamond Pro RoofingDiamond Pro Roofing
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