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How To Clean A Metal Roof (Easy Steps With Products)

Posted on June 24, 2024

Estimated Reading Time : 5 Min.

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Clean a Metal Roof

Metal roofs are popular among homeowners due to their energy efficiency, long lifespan, and ability to withstand harsh climatic conditions. However, like any other roof, metal roofs can accumulate stains, dirt, and debris over time, reducing their appearance and sometimes, their ability to function properly. Fortunately, cleaning metal roofs is a straightforward process that requires some experience and the right products. 

At Miller Roofing and Renovations, we aim to provide you with the best roofing services and related information. In this blog post, we have provided a simple step-by-step process for cleaning a metal roof and mentioned some of the best metal roof cleaning products to use.

Materials Needed

  • Soft bristle brush
  • Garden hose 
  • Ladder
  • Mild detergent or roof cleaner
  • Bucket
  • Rubber-soled shoes or roof boots

A Step-By-Step Process On How To Clean A Metal Roof

Clean a Metal Roof
Clean a Metal Roof

Here is a simple step-by-step process for cleaning a metal roof:

Step 1: Prepare The Roof’s Surface

Before you start cleaning, it’s essential to remove any loose debris or objects from the roof’s surface. Take a brush or broom with soft bristles to sweep away leaves, twigs, or other loose materials. Harsh brushes can cause scratches on the metal surface during the cleaning process. Then, rinse the surface with plain water.

Step 2: Mix The Cleaning Solution

If you’re using a mild detergent, mix a few drops of the detergent with water in a bucket, following the manufacturer’s instructions. If you’re using a specialized roof cleaner, follow the product’s directions for dilution.

Step 3: Apply The Cleaning Solution

Use a soft-bristle brush or broom to apply the cleaning solution to the metal surface, starting from the top of the roof and working your way down. Scrub gently to avoid damaging the metal or removing any protective coatings.

Step 4: Rinse Thoroughly

Once you’ve applied the cleaning solution to the entire roof surface, use your garden hose with a high-pressure nozzle to wash away the solution and any remaining dirt or grime. Start from the top and work your way down, ensuring that you rinse thoroughly to prevent any residue from drying on the metal.

Step 5: Spot Clean Stubborn Stains

If you encounter any stubborn stains or discoloration, you may need to apply a more concentrated cleaning solution or use a specialized stain remover product. Always follow the manufacturer’s instructions for safe and effective use.

Step 6: Dry The Roof’s Surface

Once you’ve completed the cleaning process, allow the roof surface to dry completely before walking on it or replacing any rooftop accessories or equipment.

Five Most Popular Metal Roof Cleaners

  1. Triple OX Brushless Oxidation
  2. Wet & Forget Roof Cleaner
  3. Mold Armor E-Z House Wash
  4. Spray and Forget Revolutionary Roof Cleaner
  5. JOMAX Roof Cleaner and Mildew Stain Remover

Avoid These Missteps When Cleaning Metal Roofs

Here are some missteps that you must avoid while cleaning your metal roof:

#1 Harsh Scrubbing

Do not scrub the roof with a harsh brush, as doing this may cause scratches on the surface. Your metal roof may have a protective coating and paint, which harsh scrubbing can damage, affecting its overall appearance and functionality. 

#2 Don’t Walk Directly On The Roof Panels

Avoid walking directly on the metal roofing panels, as the weight and the friction can lead to dents and crimps. Use ladders or walking boards to distribute the weight properly. 

#3 Don’t Clean In Direct Sunlight

The hot metal surface will only get warmer under direct sunlight, causing cleaners to dry too quickly and potentially damage the roof. Work on cooler, overcast days or in the morning/evening hours when the roof has a higher chance of being shaded.

#4 Don’t Leave Standing Water Or Debris After Cleaning

Make sure to perform a post-cleaning inspection once you are done. Look for ponded water or any debris once you are done with the cleaning process. 

#5 Don’t Use High-Pressure Washers

Experts follow the right techniques to clean your roofs with pressure washers.  If you try to wash your roof yourself using a high-pressure washer, you could damage the protective coating, paint, or even dent the metal surface. The powerful jetstream of water might be too strong and harm the roof if not used properly. Experts know how to adjust the pressure and what techniques are needed for a safe metal roof cleaning. 

How Much Does It Cost To Clean a Metal Roof?

The average cost to clean a metal roof can vary depending on the surface area of your roof, the amount of cleaning required, and whether you opt for a professional roof cleaning or plan to tackle the project yourself.

If you clean the roof yourself, the money you spend will primarily be on the cleaning materials and any necessary equipment, such as a ladder or safety harness. Depending on the quality of the products you choose, expect to pay between $100 and $300 for cleaning supplies and tools.

Hiring a professional roof cleaning service can be more expensive, but it may be worth the investment, especially if you have a large or steep roof, or if you’re uncomfortable working at heights. Professional roof cleaning services typically charge by the square foot, or by the job.

On average, the cost to have a professional clean a metal roof can range from $0.20 to $0.60 per square foot, with most homeowners paying between $300 and $600 for a standard-sized roof. However, larger or more complex roofs can cost significantly more, with some companies charging more than $1,000.

It’s important to note that while cleaning your metal roof can improve its appearance and potentially extend its lifespan, it’s not a substitute for regular maintenance or necessary repairs. If you notice any signs of damage, such as rust, leaks, or loose panels, it’s best to address them immediately to avoid any further deterioration.

Also Read – What Color Metal Roof Fades The Least?

Why Is It Important To Hire An Expert?

It is recommended that you hire a professional to clean your metal roofs instead of attempting it yourself, and the main reason is safety! Cleaning your metal roofs, especially the slippery ones, is extremely dangerous if you don’t have the right skills, experience, and tools. 

Professionals have the right set of skills and experience, and they use the right safety equipment while working at heights. Hiring an expert also saves you time and energy! Experts have the right methods that allow them to finish the task efficiently and effectively. 

Using the wrong cleaners or methods can potentially damage or dull the metal finish. Experts have the right tools and pressure washers to thoroughly clean every area, removing built-up grime that homeowners may miss. During the cleaning, they can also identify any loose panels, leaks, or other issues that may need repair. Doing it right avoids accidentally voiding manufacturer warranties. While more expensive upfront, hiring pros ensures the cleaning is done correctly and safely, preventing much higher repair costs due to improper methods causing damage.

Call Miller Roofing and Renovations For Metal Roofing Services In Memphis, TN 

For reliable commercial roofing services in Tennessee, trust Miller Roofing and Renovations. Our experienced roofers are here to handle everything from repairs to complete roof replacements with expertise and care. We understand the role of a well-functioning roofing system for your building. Whether you need a consultation, repairs, or a new roof installation, our team delivers reliable services to meet your needs. Feel free to call us today at (901) 457-9405 to schedule a consultation. We’re ready to provide the best roofing solutions as per your custom needs.

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