Find a roof cleaning professional near Redmond, WA

Find a roof cleaning professional near Redmond, WA

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Find a roof cleaning professional near Redmond, WA

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Top 10 Roof Cleaning Professionals near Redmond, 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 Redmond roof cleaning professionals
Tom R.
Leo did a very thorough job of cleaning the roof and making sure all debris was cleaned up.
Diamond Pro RoofingDiamond Pro Roofing
Mustaqim M.
Leo arrived on time and cleaned the roof and left it looking like new. He inspected the roof for any existing damages. He also cleaned the yard which already had some fall foliage. Highly recommended!
Diamond Pro RoofingDiamond Pro Roofing
Tony F.
Paul and his crew did a great job cleaning my roof.
Emerican ServicesEmerican Services
Elisabetha S.
I needed my roof and gutters cleaned and was very happy with the service from Proman.
Proman ServicesProman Services
Thumbtack Customer
We are very fortunate to have found this company to clean our roof. The communication is fast and easy. The work was done as scheduled. The pictures of the roof were shown to us before and after the work.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Xiaohai Y.
Jose did a brilliant job of the moss cleaning. He responded immediately and gave a very thorough evaluation punctually. He removed the moss from my roof, treated it the roof, cleaned the gutters AND everything up. I would definitely recommend him to my friend.
Goodbye mossGoodbye moss
Leslie S.
I was really pleased with the work performed by Marco. He did an excellent cleaning my roof!
MV construction and cleaning services LLCMV construction and cleaning services LLC
Thumbtack Customer
Roof cleaning/Moss treatment. Crew arrived on time. Very efficient very courteous. Will hire again!
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Thumbtack Customer
Affordable roof cleaning, showed up on time, did a great job in a couple hours. Fully satisfied.
Proman ServicesProman Services
Lingda S.
We had some trees covering one side of the house that caused moss growth on the roof. Pedro was responsive and punctual and did a great job cleaning up the roof and gutters. The gutters no longer overflow with leaves and debris.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Manjunatha S.
Leo did excellent work of roof cleaning and moss removal and he did cleaned properly around the house. Will definitely hire next time and happy to refer to friends.
Diamond Pro RoofingDiamond Pro Roofing
Scott K.
Leo was spectacular!! They did an amazing job and were extremely careful with my roof and surrounding landscaping. After they cleaned up you couldn’t even tell they were there except that my roof and gutters looked great! Highly recommend!! Thanks Leo!
Diamond Pro RoofingDiamond Pro Roofing
Ekta V.
Brandon did a wonderful job! Would hire him next time for sure and would highly rexommend him to anyone looking to clean their roof.
Quick homecareQuick homecare
Joanne O.
Leo was on time and did an excellent job cleaning our roof and gutters. He did a great job cleaning up after the job was done and would definitely refer to him to others. Thanks Leo!
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
ASAP cleaned my gutters and roof, they also removed all the moss! Very kind, fast and professional. Amazing clean up job too. Thank you! I am completely satisfied with the service provided.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Thumbtack Customer
Jorge did an excellent job cleaning my large roof! He was on time and completed the job on time. I recommened him to my neighbor today .
Proman ServicesProman Services
Udit M.
Really Nice work. He was on time, explained everything to me. Cleaned the roof, removed all moss, and most importantly cleaned the entire area around the house where dirt fell off. Even cleaned my entire patio. Highly recommended.
Diamond Pro RoofingDiamond Pro Roofing
Andrey K.
Leo did an excellent job cleaning our composite roof, skylights, and a light acrylic roof over the deck. He is very responsive and communicated everything very well. He does take pride in his work and rightfully so. I'll definitely contact him next time around.
Diamond Pro RoofingDiamond Pro Roofing
Deen Y.
Leo did an amazing job and he cleaned up roof, moss treated, fixed the gutter inclination, installed gutter guards. He highly recommend him and I plan to get his services in future.
Diamond Pro RoofingDiamond Pro Roofing
Jim K.
Brandon was very professional and knowledgeable. Did a great job cleaning and repairing my roof. Pointed out a number of spots that needed repair, and offered to fix most of the problems without adding to the price. These guys really worked hard!
Northwest Paint & RemodelNorthwest Paint & Remodel
Priyanka P.
I hired them for roof cleaning and pressure washing the driveway and deck as their pricing was very competitive. I quickly got a quote and on the work day they were right on time. These guys did an excellent job! Will definitely recommend them.
Best Seattle Roofers, LLCBest Seattle Roofers, LLC
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