How much does roof cleaning cost?

The cost of cleaning will vary greatly, depending on the roofing type, total square footage and where you live. For the most accurate estimate, contact professional roof cleaners in your area.

From how much you can expect to pay to answers to frequently asked questions, this cost guide is a starting point for any homeowner who needs to learn more about roof cleaning prices and services. 

Some roofers will charge per hour for cleaning services. The average hourly rate is $65 per hour, but rates range drastically from $30 to $350. 

The cost per hour can be affected by other factors, such as your home’s roof type and the type of cleaning services you wish to book. Additionally, pros will often charge you based on the project — not based on their hourly rate. Some companies will also offer packages.

The following estimates can help you calculate your project cost based on square feet. Cleaning a roof that’s less than 1,000 square feet costs approximately $400 (about $0.40 per square foot), on average. Meanwhile, a roof that’s 3,000 to 4,000 square feet costs approximately $500 to $630 to clean.

When you reach out to companies for free quotes on your project, one of the first questions you’ll likely need to answer is, "What is the size, pitch and slope of your roof?" If you don't know the answer, the company will likely need to come out and view your roof so they provide an accurate quote.

Pressure washing (more specifically, soft washing) is one common cleaning method. On average, pressure washing a roof costs $475, but prices vary from $85 to $1,100. This method of removing dirt and debris can be effective. However, too much pressure can damage a roof, which is why this process is best left to a pro.

Pressure washing prices vary depending on where you live, as well as a few other factors. And, in most cases, a roof cleaning service will want to visit your home to provide the most accurate cost estimate.

Moss removal

When algae and moss start to grow on your roof, you’ll want to hire someone to take care of it ASAP. Algae and moss removal is often done by performing a soft wash. This method utilizes a lower pressure, detergents and specialty cleaners to complete the cleaning process.

You can tell if you have algae or moss if you notice black streaks or green layers on your home. Algae and moss growth is not only unsightly, but it can also lead to severe structural damage. Most commonly seen in humid and coastal climates, such as Northwest and the South, moss removal is a critical part of roof maintenance.

The cost to clean wood, metal, tile and asphalt shingle roofs typically ranges between $350 and $580. Here are some things to keep in mind when estimating prices and planning your project:

Tile roof cleaning

A tile roof should be well-maintained. Algae, moss and mildew can grow on tile roofs, including clay and concrete tiles, due to debris and other organic matter, according to the Tile Roofing Industry Alliance.

Cedar shake roof cleaning

A professional should clean your cedar roof with care. If the pro decides that power washing is the best method, the Cedar Shake & Shingle Bureau (CSSB) recommends they add a topical treatment to help restore the wood. Additionally, the bureau recommends ensuring that the pros take the roof’s age, condition and environment into account before soft washing. 

Metal roof cleaning

Metal roofs are designed to be durable. Capable of withstanding a heavy amount of weathering, they're often installed on homes in areas where extreme weather is a concern. However, as is true with any roof material, metal roofs still need to be cleaned to maintain their structural integrity. 

The costs involved with roof cleaning can be driven up or down by a few common factors:

• Condition. If there's a lot of dirt, grime, buildup, debris, moss, mildew or algae, you might have to pay a higher price. 
• Extra services. You might also want to opt for additional services. For example, you might decide to add on gutter cleaning. Keeping your gutters free of debris is another important part of home maintenance.
• Roof replacement or repairs needed. When you hire a pro, they might find that you need some repairs — or you need to replace it. For example, you may have missing tiles or shingles, cracks, damaged flashing or broken gutters that need to be fixed.
• Location. Perhaps one of the biggest differentiators in costs is your location. The cost of living in your area plays a role in how much any service will cost. 
• Square footage. Before any accurate quote can be provided, a contractor might need to know your roof’s size. Some projects are quoted on a square footage basis. If you aren’t sure how large yours is, ask the pro to provide an in-person quote. 
• Material. Certain roofing materials might be easier for the contractor to clean than others. 

Not only will cleaning your roof boost its curb appeal, but it can actually help preserve its structural integrity. Also, a clean roof makes it easy to identify where, if any, areas need repairs.

If you don’t soft wash your roof, you may start to see shingle deterioration or wood rot — both of which are major headaches to repair. And if you allow moss to grow, you risk damaging your tiles or asphalt shingles. Your shingles might curl and eventually blow off if there are high winds, according to the Asphalt Roofing Manufacturers Association, and the moss can eventually lead to moisture damage and leaks. 

Maintaining a clean roof is important. But, how do you know it’s time to schedule an inspection and cleaning? The following are all telltale signs you should call a pro: 

• It looks visibly dirty with grime and buildup
• You see black streaks, moss, algae or mildew
• There are overhanging tree branches
• The shingles are lifting or curling
• You can’t remember the last time you cleaned your roof

These are just a few of the signs. Consult a professional for an in-person inspection to ensure you're not missing any other signs.

You may be tempted to opt for the do-it-yourself route rather than hiring a pro for the job. While roof cleaning can be handled on your own in some cases, there are some benefits to hiring a pro. Roof cleaners and contractors offer expertise and specialized cleaning methods. Additionally, they utilize quality products that might be difficult to find. 

The following outlines the pros and cons of DIY and professional services:

While roof cleaning is a fairly affordable service, any homeowner naturally wants to cut down costs as much as possible. To save money, consider the following three tips:

1. Shop around. Always ask for as many free quotes in your area as possible. This ensures that you’re getting the best price you can.
2. Ask about package deals. Companies might offer you discounts when you bundle other services, such as gutter cleaning and other related tasks.
3. Ask about price matching. If you find one company you really want to hire but another company quoted you a lower price, ask about price matching options or other available discounts and deals. 

Now that you have a good idea of how much roof cleaning will cost you, it’s time to start looking for the best professional for the job. Before you choose a company, check out the following hiring tips:

1. Compare professionals online. The beauty of shopping around today is that the internet makes it simple to compare the services available in your area. 
2. Ask for estimates and free quotes. Costs can vary greatly. For this reason, it’s important to ask for as many estimates and quotes as possible from a variety of professionals near you. This will help you compare and contrast your options for services. 
3. Check credentials and licenses. Not only do you want to compare different professionals’ pricing structures, but you also want to make sure they have the proper credentials and licenses. It’s often recommended that you opt for a roofing contractor with specialized skills instead of a general cleaning company.
4. Read online reviews. Spend some time reading online reviews before hiring any company. Do they have a track record of proven work? Ask for project photos as well. 
5. Ask a lot of questions. Don’t be afraid to ask a professional as many questions as you want before hiring them. From what to expect from their services to the method and cleaning products they utilize, take the time to have your questions answered upfront.
6. Visit Thumbtack’s Safety Page. This smart hiring guide offers more tips on how to hire a professional safely.

Routine maintenance helps prevent the need for major repair and replacement services down the road. Use Thumbtack to compare costs and find top-rated roof cleaners near you.