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Comprehensive Guide to Roof Washing Costs & Best Methods

July 28, 2023

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How much does roof washing cost? Homeowners often find themselves asking that question regularly! One reason is that consistent roof cleaning removes harmful debris from the roof, protecting against damage. Two, roof washing is not a DIY job but is best left in the hands of the pros!

In general, roof washing might cost 10 to 40 cents per square foot. Also, some roof washing contractors might charge an added fee for especially steep roofs, tough dirt and stains, or specialty care. On the other hand, they might give you a discount if you pair roof washing with other cleaning services!

Only a roof washing contractor near you can offer an actual estimate for washing services on your property. In the meantime, you might check out some added information about average roof washing costs. This will give you an idea of what you might be facing for your home! Above all, you can decide if this service is right for your property and how often it should be scheduled.

How much does roof washing cost

How Much Does Roof Washing Cost on Average?

Roof washing costs vary significantly depending on the size of the roof, its material, dirt and grime buildup, and your location. Additionally, the method of roof washing used (pressure washing, soft washing, etc.) can also affect the cost. Here are some rough estimates of roof washing costs:

Pressure Washing

Pressure washing is suitable for certain types of roofs such as metal or clay. However, it can be more expensive than soft washing due to the higher equipment costs. The average costs for roof pressure washing range from $0.20 to $0.40 per square foot. So, for a 2,000 square foot roof, the cost can be around $400 to $800.

Soft Washing

Soft washing uses low-pressure water and specialized cleaning solutions to remove dirt, algae, and stains. Roof soft washing costs are generally lower than pressure washing. They often range from $0.10 to $0.30 per square foot. For a 2,000 square foot roof, the cost may be around $200 to $600.

Additional Services

If your roof requires additional treatments, such as moss or algae removal, gutter cleaning, or repairs, expect extra costs. Many roofers charge a flat fee for such services or might increase your square foot price slightly.

Does a Roof Need to Be Washed?

The short answer is yes, a roof needs professional washing! Check out a short list of reasons why you might consider regular roof washing for your property:

  • In humid and damp climates, algae, moss, and mold can grow on roofs, especially on shingles. These growths can retain moisture, potentially leading to roof damage over time. Roof washing can help remove these organisms and prevent further damage.
  • Roofs can accumulate stains from leaves, bird droppings, and other debris. Regular roof washing can be effective in removing these stains and improving the roof's appearance.
  • If your roof has a lot of debris or leaves, cleaning the roof can help prevent clogged gutters, which can cause water to overflow and damage the roof and the surrounding areas.
  • Regular maintenance, including roof washing, can help extend the life of your roof by preventing the buildup of harmful elements and reducing wear and tear.
  • Roof washing can be a preventive measure to keep your roof in good condition and avoid potential issues that might arise from neglect.

Before deciding to wash your roof, it's best to consult with a professional roofing contractor or roof washing service. They can inspect your roof, determine if cleaning is necessary, and recommend the most suitable and safe cleaning method for your specific roof material and condition.

before and after tile roof cleaning services

How Long Does Soft Wash Roof Washing Last?

The longevity of a soft wash roof washing varies depending on several factors. These include the climate, roof material, level of dirt and algae buildup, and quality of the cleaning performed. Generally, a well-executed soft wash can keep a roof clean and free of algae, moss, and stains for several years.

Soft wash roof cleaning typically involves using low-pressure water and specialized cleaning solutions. This process removes algae, mold, and other contaminants from the roof surface. The cleaning solutions used in soft washing often contain biocides that help to inhibit the growth of algae and other organic matter. In turn, they can extend the cleaning's effectiveness.

  • Roofs in humid and damp climates are more prone to algae and mold growth. In such regions, soft wash cleaning may need to be performed more frequently to maintain the roof's cleanliness.
  • Some roof materials are more resistant to algae and stains than others. For example, metal and concrete are less susceptible to algae growth compared to asphalt shingles. A roof made of materials more prone to algae may require more frequent cleaning.
  • The thoroughness and effectiveness of the soft wash cleaning impacts its longevity. A well-done cleaning that removes all traces of algae and mold is likely to last longer than a less stellar job.
  • Regular roof maintenance, including keeping gutters clean and trimming overhanging branches, reduces debris accumulation in gutters. This also minimizes the growth of algae and moss on the roof.

As a general guideline, soft wash roof cleaning can last anywhere from 2 to 5 years or more. Some roofs may require more frequent cleaning, while others may remain relatively clean for a longer period. If you notice signs of algae or mold growth returning on your roof, it's time to consider another soft wash cleaning to prevent further damage and maintain the roof's appearance.

What Do Professionals Use to Clean Roofs?

Professionals use a variety of tools and cleaning solutions to clean roofs effectively. Their choices depend on the roof material and dirt levels. The most common methods used by professionals to clean roofs include:

  • Soft washing is used to clean roofs without using high-pressure water. This process involves applying a specialized cleaning solution that includes surfactants, detergents, and biocides. The biocides help to kill and inhibit the growth of algae, moss, and other organic matter. The cleaning solution is applied using low-pressure sprayers or pump systems.
  • In cases where pressure washing is suitable for the roof material, professionals may use low-pressure power washers. These washers help remove dirt, grime, and debris. They carefully adjust the pressure to prevent damage to the roof surface.
  • Soft bristle brushes are sometimes used for gentle scrubbing, particularly on delicate roof materials like slate or tile. This method helps to remove dirt and algae without causing damage.
  • For roofs with a significant slope, professionals may use water-fed poles with soft brushes to clean the roof from the ground level.
  • Many professional roof cleaning solutions are biodegradable and environmentally friendly. They are formulated to break down over time, minimizing harm to the environment.

Note that using the wrong cleaning method or harsh chemicals can damage the roof and void its warranty. Therefore, it is essential to hire a reputable and experienced roof cleaning professional. Pros understand the unique needs of your roof and can use the appropriate cleaning approach to achieve the best results.

power washing a roof south Venice

Is It Worth Having Your Roof Cleaning Professionally?

Homeowners often assume that they can rent pressure washing equipment and manage roof washing themselves. However, this can be a costly mistake in the long run! Consider some reasons why it’s good to invest in professional roof washing for your property:

  • Roof cleaning can be a hazardous task, especially if you're not experienced or equipped to work at heights. Climbing on a roof without proper safety gear and training can lead to accidents and injuries.
  • Using the wrong cleaning methods or tools can cause significant damage to your roof. High-pressure washing, for example, can strip away protective coatings, dislodge shingles, and lead to leaks and structural issues.
  • Professional roof cleaning companies have specialized equipment and tools designed for safe and effective roof cleaning. DIY attempts may lack the appropriate tools, making the cleaning less efficient and potentially damaging.
  • DIY roof cleaning might involve using cleaning solutions that could harm the environment, surrounding vegetation, and even your home's exterior. Professionals use biodegradable and eco-friendly cleaning agents.
  • DIY roof washing methods may not be as effective as professional techniques. Professionals have the expertise and experience to tackle stubborn stains, algae, and mold effectively.
  • Some roofing warranties may become void if improper cleaning methods, such as high-pressure washing, are used. Professional roof cleaners are trained to maintain warranty compliance.
  • Roof cleaning is a time-consuming and physically demanding task. Professionals can complete the job efficiently, saving you time and effort.
  • If you cause damage or accidents while attempting DIY roof washing, it might not be covered by your homeowner's insurance. On the other hand, professionals typically have insurance policies that reimburse you the cost of such repairs.
  • Roof cleaning requires knowledge of different roof materials and how to clean them without causing harm. Professionals are trained to identify the appropriate cleaning methods for specific roof types.

A Word From Our Soft Wash Pressure Washing Team

ProClean Pressure Washing Venice is happy to answer the question, how much does roof washing cost? If you’re in the area and want a specific quote for your property, call our Venice power washing contractors. We offer FREE quotes and guaranteed satisfaction, so call today!

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