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How to Clean a Metal Roof

Protecting your metal roof is necessary for extending its lifespan and ensuring it remains free from rust or damage. Unfortunately, many homeowners neglect metal roof maintenance, leading to a weaker structure. In this blog post, we’ll discuss the five steps on how to clean a metal roof to keep it in tip-top shape – so let’s get started!


5 Steps to Cleaning and Maintaining Your Metal Roof


1. Gather all the necessary roof cleaning tools

Before you begin the cleaning process, make sure to have all the necessary materials that you will need around you. This will make cleaning convenient and more manageable. Typical roof cleaning tools and materials you can use include:

  • A soft-bristled brush or broom.
  • A hose with a high-pressure nozzle.
  • A non-abrasive cleaner specifically designed for metal roofs.

You must also have a ladder or other safe way to access the roof, as well as protective clothing and eyewear to avoid injury.


2. Cleaning a Metal Roof by Removing the Dirt

Once you have gathered the materials, you can begin cleaning. Cleaning a metal roof starts by removing large debris or dirt from the roof’s surface using the broom or brush. A great tip is to brush in the direction of the metal panels to avoid damaging the surface.

Depending on where you live and how often the roof is exposed to environmental conditions, this can be a regular task. Also, if there are strong stains or areas of moss or lichen build-up, then manual clearing of these areas is recommended as well as using specific products designed for this purpose. Combining both methods can ensure that your roof is kept clean and maintained year-round.


3. Hose Down the Roof

For this step, you will need a hose with sufficient water pressure to reach the roof and a strong ladder to access it safely. Here are the steps you can follow:

  1. Set up the ladder on level ground and ensure it is securely positioned before climbing up.
  2. Climb the ladder onto the roof, careful not to slip or trip.
  3. Hold the hose and direct the water to the roof, starting at the top and working your way down.
  4. Use the water to loosen any dirt stuck to the roof.
  5. Once you have hosed down the entire roof, use a broom or other tool to sweep away any remaining debris.
  6. Turn off the water when you finish, and carefully climb the ladder.

Be cautious when hosing down a roof, as the water can create slippery conditions, and the ladder can be unstable if not correctly positioned. It is also a good idea to wear rubber-soled shoes to help prevent slips and falls.


4. Apply the Metal Roof Cleaner

Use a non-abrasive cleaner to avoid harming the roof’s surface.

  1. Wear protective gear and a breathing mask to protect yourself from the chemicals in the cleaner.
  2. Mix the cleaner according to the manufacturer’s instructions using a bucket and a stir stick.
  3. Apply the cleaner to the roof using a soft-bristled brush, sponge, or roller. Start at the top of the roof and work your way down.
  4. Allow the cleaner to sit on the roof for the recommended time, as specified by the manufacturer.
  5. Rinse the roof thoroughly with clean water, using a hose with sufficient water pressure.
  6. Once the roof is thoroughly rinsed, allow it to dry completely before applying additional treatments or coatings.

Remember to follow the manufacturer’s instructions carefully when applying a metal roof cleaner, as the wrong cleaner or application method can cause damage to the roof.


5. Rinse the Roof Again

Once you’ve finished cleaning your roof, it’s important not to forget the final rinse. A thorough rinse at the end of the process ensures that dirt, residues, and all other gunk left on your roof after the cleaning process are completely gone. A soft water hose is a great tool for the job since it provides a continuous stream of clean and gentle water that can help remove all lingering debris from your roof. After rinsing it carefully, you’ll know that your roof is safe from dirt and grime.



Metal roof maintenance requires regular care and cleaning at least once a year using the steps outlined above. It is also important to repair any damage as soon as it is detected to prevent further deterioration. If you stay consistent with this steps, you’ll have a clean and well-structured roof for a long time!