How To Clean A Metal Roof

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Metal Roof Pressure Washing – Without High Pressure

How To Clean A Metal Roof

A clean, gleaming metal roof can enhance the curb appeal of any property. However, multiple environmental factors such as dirt, debris, fungi, and harsh weather can seriously affect the look and longevity of the metal roof. Therefore, regular and systematic cleaning of your metal roof is extremely important.

Many property owners may ask, is metal roof pressure washing safe for my roof? In this article, we’ll discuss the safest and most efficient way to clean a metal roof— the “soft wash” method. We will delve into what the soft wash method is, how it works, and why it’s beneficial for metal roofs.

What is the Soft Wash Method?

Typically, the primary methods applied for cleaning roofs are pressure washing and the soft wash method. Pressure washing can be great for hard surfaces like patios and driveways as it uses high-force water to remove contaminants forcefully. However, when it comes to delicate surfaces such as metal roofs, using high pressure may cause irreversible damage. That’s where the soft wash method comes into play.

The soft wash method involves the use of specialized cleaning solutions applied at a lower pressure, usually less than 500 PSI, equivalent to a garden hose’s strength. This method doesn’t rely on high pressure to do the cleaning but instead allows the cleaning solution to do the work.

How the Soft Wash Method Works

At Shine City, we’ve honed a specific process for using the soft wash method effectively to clean metal roofs. Here’s the step-by-step breakdown:

  1. Assess the Roof: The first step involves inspecting your roof to identify the type and amount of contaminants present and evaluate the consideration the roof’s pitch and accessibility.
  2. Prepare the Cleaning Solution: Next, we prepare the cleaning solution. Our solution is primarily based on sodium hypochlorite (commercial grade chlorine), with added surfactants helping the chemical adhere to the surfaces for a longer duration, ensuring a thorough clean.
  3. Apply the Solution: The prepared solution is then applied on the roof using soft wash equipment. The solution can reach peaks and odd angles of your metal roof, gently attacking and breaking down the organic material.
  4. Rinse the Roof: After the solution has done its work, we rinse the roof, ensuring lower pressure than traditional pressure washing. This helps avoid any potential damage to the roof.

Why Soft Wash Method is Essential for Metal Roofs

The soft wash method offers numerous benefits compared to traditional metal roof pressure washing:

  • Avoids Damage: The soft washing method uses less pressure than standard pressure washing, reducing the potential for damage to your metal roof.
  • Kills Organic Growth: The use of a cleaning solution in the soft wash method kills moss, algae, lichens, and bacteria present on your roof rather than just blasting them away, leading to a longer-lasting clean.
  • Maintains Roof integrity: The soft wash method helps maintain the color, texture, and original look of your metal roofing, keeping your home’s aesthetic.
  • Eco-friendly: Soft washing uses less water than pressure washing, making it a more environmentally friendly option.


In conclusion, while it may seem tempting to go for an intense high-pressure wash to clean your metal roof of grime and organic growth, it could be a costly mistake. Opting for a professional ‘Soft Wash’ such as provided by Shine City, Surrey, British Columbia, and surrounding regions is practical, safe, and ensures the long-term health of your roof.

At Shine City, we understand that every roof is different and requires a customized approach. With our soft wash method, we provide efficient and safe metal roof cleaning that not only clears the present contaminants but also provides a shield for the future. Our service delivers maximum satisfaction and peace of mind, knowing that your metal roof is safe and sparkling.


1. Can I soft wash my metal roof myself? While it’s physically possible, DIY soft washing can be risky. Without proper knowledge, you might end up damaging your roof or injuring yourself. It’s advisable to hire professionals for this task.

2. How often should a metal roof be cleaned? Typically, annual cleaning is recommended, but this could vary based on your location, weather conditions, and surrounding vegetation.

3. Will the chemicals used in soft washing harm my plantings? Not if done correctly. At Shine City, we take care to protect your plants and vegetation by rinsing them thoroughly during the soft washing process.

So, let the professionals handle your roof with care and expertise. Contact us at Shine City today for a comprehensive and efficient metal roof cleaning service. With us, your satisfaction is guaranteed.