A note to our community regarding COVID-19. Learn more
Find a roof cleaning professional near Issaquah, WA

Find a roof cleaning professional near Issaquah, WA

5 near you

Find a roof cleaning professional near Issaquah, WA

5 near you

Give us a few details and we’ll match you with the right pro.

Zip code

Top 5 Roof Cleaning Professionals near Issaquah, WA

Roof Cleaning Services Cost Guide

  • $
  • $$
  • $$$
  • $$$$

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.

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.

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.

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 Issaquah roof cleaning professionals
Tim F.
Bolivar did an excellent job of roof cleaning, gutter cleaning, and exterior window cleaning. Very pleased with the cost and the results.
Wash Me Window CleaningWash Me Window Cleaning
Perry C.
It had been over three years since we had someone clean our roof. The roof had become a repository for moss, needles, and tree branches. Leo did an excellent job of removing every bit of moss and other items from our composite roof. I was surprised at just how good the roof looked afterward! Now that the roof was cleaned, and moss-kill was applied at the gables, the ground and deck were covered with dead moss. Leo cleaned up all around the house. He gave special attention to the deck and the items on the deck. Every bit of moss was removed (very detailed). We will certainly use his services again!
Diamond Pro RoofingDiamond Pro Roofing
Bill Z.
Very high quality work. My roof got a lot of moss after the last two winters and looked very bad. Now my roof looks like brand new after the cleaning.
Diamond Pro RoofingDiamond Pro Roofing
Thumbtack Customer
Pedro and his team did an excellent job! My roof is clean now and with the moss treatment! Highly recommend!
ASAP Graffiti Removal and Pressure Washing LLCASAP Graffiti Removal and Pressure Washing LLC
Bruce L.
Great job! Very good and positive communication throughout the roof cleaning and after the job was complete. They focused on ensuring that they exceeded my expectations with their work. Our roof is a very challenging surface. They stuck with it and did a thorough job. It looks great and it will be easy to maintain going forward. I will ask them back next year!
3 Guys On A Roof3 Guys On A Roof
Thumbtack Customer
Wanted moss removed with air, gutters cleaned, skylights cleaned, moss control sprayed. Received debris blown from roof with air, gutters cleaned, skylights cleaned. moss control applied. Still have moss and will need to hire another to get rid of moss! Contractor said it would have cost much more to remove moss. Claimed he delivered exact wording. Could be problem of semantics but I believe he knew I was not receiving intended result! Beware!!!
Proman ServicesProman Services
Ready to find a pro?

See more reviews, compare prices, and hire your favorite pros all with Thumbtack.

Why hire professionals on Thumbtack?
Free to use

You never pay to use Thumbtack: Get cost estimates, contact pros, and even book the job—all for no cost.

Compare prices side-by-side

You’ll know how much your project costs even before booking a pro.

Hire with confidence

With access to 1M+ customer reviews and the pros’ work history, you’ll have all the info you need to make a hire.