Roof Cleaning

Find a roof cleaning professional near Shoreline, WA

Find a roof cleaning professional near Shoreline, WA

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Top 10 Roof Cleaning Professionals near Shoreline, 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.

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.

What happens during a roofing inspection?

Roof inspectors are trained to look for signs of a failing roofing system that could lead to damage — especially water and structural damage. Your home's roofing materials may look great from the ground, but it's difficult to see potential damage unless you take a closer look. A roof inspector can do just that.

During an inspection, the professional will typically look for issues that may have occurred during installation and manufacturing. They’ll also keep an eye out for damage caused by normal wear and tear, as well as extreme weather events. They might also access your attic to see if there are signs of a leak in your roof.

Here’s a short list of common things a contractor will look out for during a roof inspection: 

  • Damage caused by hail, wind, snow and rain
  • Missing, broken, buckling, curling or cracked shingles 
  • Roof decay, rot, moss, mildew and mold
  • Rust around the flashing
  • Damaged chimneys and vents
  • Holes, gaps and punctures that could cause a roof leak
  • Water stains and ventilation issues

Hiring a roofing inspector prevents you from having to do the dangerous work of climbing onto your roof. Plus, inspectors know how to assess potential damage and determine the best way to repair your roof and prevent the need for more expensive repairs in the future. Start searching for a roof inspector on Thumbtack today.

When should I get my roof inspected?

Experts typically recommend that you have your roof professionally inspected at least once a year. But you also may want a licensed professional to inspect your roof during these circumstances: 

  • You're buying or selling a home
  • You're filing an insurance claim
  • Before or after a contractor does major work on your roof

Search the Thumbtack site for experienced roof inspectors near you. You can contact them directly to set up a time to conduct the inspection, and learn more about their pricing structure and services.

Reviews for Shoreline roof cleaning professionals
Emily H.
Did a great job cleaning my roof and the surrounding areas after the roof was cleaned. Would hire again!
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
he did not want to get on my roof to clean it. I think he was scared. Roof cleaner- don't think so.
Forest Home MaintenanceForest Home Maintenance
Tam C.
Great work on roof cleaning and gutters!
New World RoofingNew World Roofing
Bradley J.
They did a great job cleaning my roof!
Jim L.
Bruno, responded promptly with an online quote to do my roof cleaning that was competitive. On request he used vinegar I provided for post-cleaning treatment of roof for moss growh inhibition. Bruno showed up exactly on time and did an amazingly thorough job on our dirty roof. I was so glad he was great at the clean-up effort as well since a lot of debris came off the roof. I would highly recommend Bruno for roof /gutter cleaning. He appears to be a small business and I also appreciate supporting him for that.
Bazere King cleaningBazere King cleaning
Hamza H.
Got great service and a thorough roof cleaning and clean up afterwards. Thank you!
Brave BuildersBrave Builders
YiHao Z.
Bruno is professional and he has a clean working method. He did roof cleaning well. He also made sure not to leave any debris around the house. I would recommend hiring Bruno for roof cleaning!
Bazere King cleaningBazere King cleaning
Renee B.
Roof looks great! Cleaned up and was very professional and friendly. Will recommend.
Diamond Pro RoofingDiamond Pro Roofing
Jonathan W.
Great service, communication and work in cleaning roof. Recommend for anyone interested.
Bazere King cleaningBazere King cleaning
Ashley F.
Pete’s pressure wash was great! Cleaned the moss off my roof and was very knowledgeable and explained the process. Really friendly, will hire them again for my roof cleaning needs & already referred them to my neighbors.
Pete's Pressure Wash LLCPete's Pressure Wash LLC
Thumbtack Customer
Petro cleaned our roof and did a fine job. Will hire him again.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Mark M.
A lot of dirt from my roof everywhere, but Bruno cleaned it all up!
Bazere King cleaningBazere King cleaning
Larry A.
Happy to recommend Leonardo Roof Cleaning for moss removal. *Roof wash(moss removal) *Gutters and downspouts cleaning *Mosskill for treatment *Clean up around the house after job done *Power wash patio Punctual, hard working, professional, exceeded expectations and reasonably priced. See before and after pix.
Diamond Pro RoofingDiamond Pro Roofing
MeInda B.
Leo did an amazing job cleaning our roof and installing Bird B Gone spikes. He arrived on time, did a perfect job cleaning our roof and cleaning up all the debris all at a reasonable price. I will definitely use him again next year. Thank you Leo!
Diamond Pro RoofingDiamond Pro Roofing
Tim M.
Bruno did a great job cleaning my roof. He was on time, thorough and cleaned everything really well. Would highly recommend
Bazere King cleaningBazere King cleaning
Hari T.
Bruno did such an excellent job not only in cleaning the roof but also, cleaning the dirt from walls, windows and the yard. We thoroughly enjoyed his service and would recommend him to anyone who is looking for a clean roof. He is so professional! It is hard to find such professional workers these days at a reasonable price. muito obrigado Bruna!
Bazere King cleaningBazere King cleaning
Thumbtack Customer
Mr. Pedro Bonilla and his brother were just GREAT! They even got there early and did an amazing job. They cleaned the moss off the roof and cleaned the gutters of debris .Cleaned up, removed any sign of the moss they removed from the roof. They were very professional and easy to work with. They spent 2hrs+ and did a very good job!
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Ken’s cleaning did an exceptional job cleaning the roofs and gutters. It was the day after the wind storm with many extra debris but they tackled the job with no complaints
Ken cleaning services LLCKen cleaning services LLC
Devin S.
They did an amazing job cleaning out roof, gutters, and even the outside of the house afterward. Great to work with.
Diamond Pro RoofingDiamond Pro Roofing
Veselin M.
Amazing job. Cleaned my windows, roof, gutters, collected all the dirt! Amazing. Strongly recommend!
Brave BuildersBrave Builders
Thumbtack Customer
Our roof is 23 years old and I did not want to risk the damage involved with pressure washing. The ASAP team made the roof brand new with just a blower and brushing. They also cleaned the outside of the gutters and clear all the debris from the roof. Great experience and would will highly recommend them in the future.
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Vanessa F.
The team at Pro clean were fantastic. Cleaned the roof and cleaned up after themselves. They were also very communicative when they were running a bit behind, which was much appreciated.
The ProClean TeamThe ProClean Team
Marina S.
Great communication, competitive pricing, it was very easy to get on the schedule and they did a great job cleaning our roof.
Bazere King cleaningBazere King cleaning
Quinn W.
Bruno was excellent. Roof looks great and he did a thorough job cleaning the perimeter when he was finished.
Bazere King cleaningBazere King cleaning
Thumbtack Customer
Showed up on time, did the roofs, cleaned up--NO mess, and even blew off the driveway. Definitely recommend!
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
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