How to Clean Moss off Concrete

Published on:
This post may contain affiliate links, and we will be compensated if you buy after clicking on our links
Read our review guidelines.

When it comes to tackling moss on concrete surfaces, you might find yourself struggling with the stubborn green intruder. Fear not, as there are practical methods to help solve how to clean moss off concrete effectively. From specialized chemical solutions to pressure washing techniques, each approach offers a unique way to restore your concrete’s pristine appearance. However, choosing the right method tailored to your situation is key to achieving optimal results. So, let’s explore the best strategy to bid farewell to moss and welcome back a clean concrete canvas.

How to get rid of moss from concrete

If you want to effectively remove moss from your concrete surfaces, consider using chemical solutions, a pressure washer, washing powder, soda crystals, or even boiling water.

These methods are practical and efficient in getting rid of the unwanted greenery, restoring your concrete to a clean state. Choose the technique that best fits your needs and start tackling that moss today.

#1. Chemical solutions

To effectively remove moss from concrete, consider using chemical solutions available in hardware stores with various formulas and application methods. Some key points to keep in mind when selecting a chemical solution for moss removal include:

  • Moss killers come in different formulas suitable for various surface types.
  • Ready-to-use formulas simplify the application process.
  • Certain solutions create protective layers to prevent future outbreaks.
  • Be cautious with iron sulfate cleaners as they can leave stains on your concrete. Ensure your chosen solution is stain-free to maintain the appearance of your surfaces.

#2. Pressure washer

Consider using a pressure washer as a powerful method to effectively remove moss from concrete surfaces.

Before starting, put on protective gear and cover surrounding areas. Check your pressure washer’s instructions for the optimal settings, typically using a low-pressure nozzle. Keep a safe distance of at least 50 cm from the surface and adjust gradually if needed.

Begin by working over the moss with sweeping motions, holding the wand with both hands. Be cautious not to get too close, maintaining a minimum distance of 15 cm.

This method, along with water and possibly bleach, can help scrub away moss efficiently from the concrete surface.

#3. Washing powder

Using powdered laundry detergent can effectively eliminate moss on concrete surfaces, similar to how it cuts through grease and dirt on clothes. To make the most of this method, follow these steps:

  • Sprinkle the washing powder all over the affected area. Choose a powdered version with a ‘Bio’ label to protect the environment.
  • Wait for rain to help activate the detergent. Timing is key, so plan to apply the powder just before the rain.
  • Remove the dead moss with a hard brush once it turns brown.
  • Wash the area thoroughly and ensure it dries completely to prevent moss regrowth. Remember, excess moisture can encourage the moss to come back.

#4. Soda Crystals

For effective moss removal from concrete surfaces, incorporating Soda Crystals into your cleaning routine can provide impressive results.

To start, cover the area with the washing soda, ensuring not to confuse it with baking soda. Dampen the surface using a watering pot or a soft bristle brush to spread water without washing off the soda. Let it sit for 2-3 days to combat the moss effectively.

Once the soda has worked its magic, use a stiff brush to remove the brown layer left behind. For denser moss patches, a shovel can help lift it up.

Finish by washing the area thoroughly with water, leaving you with a clean driveway free of moss.

#5. Boiling water

To continue combating moss on concrete surfaces, another effective method is to pour boiling water over the affected area. This method might be a bit time consuming, especially if the moss has spread extensively. Here are some tips to make the process more efficient:

  • Boil water in multiple pots to cover a larger area.
  • Ask friends and family to assist in pouring the hot water over the moss.
  • Give the moss a thorough hot shower to weaken it.
  • Use a stiff brush to brush off the loosened moss effectively.

#6. Vinegar mixture

Consider mixing water and vinegar in a 1:1 ratio to create a potent solution for tackling moss on concrete surfaces. Pour the mixture into a spray bottle and generously apply it to the moss-covered areas. Let the vinegar solution sit for 2 days, ensuring the moss turns brown and dry.

If needed, reapply the mixture until the moss is completely faded. Once dry, use a stiff brush to scrape off the moss layer from the concrete surface. Finally, rinse the area thoroughly to remove any remaining debris.

Vinegar’s cleaning properties make it an effective and eco-friendly solution for moss removal from concrete surfaces.

#7. Bleach

You can effectively eliminate moss from concrete surfaces using household bleach. Here are some steps to remove moss from concrete using bleach:

  • Mix a solution of half bleach and half water in a large bucket.
  • Use a sprayer to cover the moss-affected area.
  • Scrub the concrete surface thoroughly.
  • Rinse off the bleach solution using a hose.

Remember to follow all directions on the bleach container and wear protective gear while handling the solution.

Garden supply stores often sell bleach specifically formulated for killing moss. This method can prevent moss from regrowing for up to a year, making it a popular choice for many individuals looking to clean moss off concrete effectively.

#8. Baking Soda

Eliminating moss from concrete with baking soda is a natural and effective method that can help keep your surfaces clean and moss-free.

To use baking soda as a moss cleaner, simply sprinkle it over the mossy areas and allow it to sit for at least 24 hours. Afterward, sweep up the baking soda and dispose of it properly.

This method is environmentally friendly and safe for both you and your concrete surfaces. It’s a great alternative to harsh chemicals like bleach, which can be harmful and damaging.

Starting with baking soda before considering pressure washing or chemical solutions is a smart and gentle approach to removing moss from concrete. Remember to always prioritize environmentally friendly options for a cleaner and safer environment.

Can Moss Damage Concrete?

Moss on concrete can lead to damage due to its ability to hold moisture, which accelerates surface deterioration. Here are some key points to consider regarding how moss can affect concrete and other surfaces:

  • Moss damage: Moss can deteriorate surfaces over time, causing them to weaken and degrade.
  • Spread quickly: Moss has the capability to spread rapidly, covering larger areas if not dealt with promptly.
  • Moisture retention: Moss retains moisture, creating a damp environment that’s harmful to surfaces like concrete.
  • Shorten lifespan: The presence of moss can shorten the lifespan of surfaces such as roofs and concrete, leading to the need for premature repairs or replacements.

Understanding the potential consequences of moss growth on concrete underscores the importance of proactive maintenance to prevent damage and prolong the life of the surfaces in question.

RELATED: How to Clean Moss Off Brick

How to prevent moss from reappearing on concrete

To prevent moss from returning, ensure the area gets more sunlight and inspect for any leaks that might be causing excess moisture.

Improving sunlight exposure can hinder moss growth, while fixing leaks will reduce dampness, making it less favorable for moss to thrive.

Improve the exposure of the area to sunlight

Improving sunlight exposure in the shaded areas of your yard is crucial in preventing moss from reappearing. To achieve this, consider the following:

  • Trim the shrubs and trees blocking sunlight to allow more light into the area.
  • Regularly prune your hedges to prevent heavy shade that encourages moss growth.
  • Relocate patio furniture that creates heavy shade, trapping water and promoting moss growth.
  • Evaluate the positioning of large tree branches and shrubs that obstruct sunlight, potentially fostering moss development.

Check for leaks

Check for leaks around your property to prevent moss from reappearing on concrete surfaces. Excess water from leaking faucets or damaged roof drains can keep concrete wet, creating a perfect environment for moss growth. Inspect your sprinkler setup to ensure it doesn’t saturate the concrete, allowing it to dry between waterings. Leaking roof drains can lead to constant moisture on shady areas, facilitating moss development.

Address any leaks promptly to prevent water accumulation on concrete surfaces. By fixing leaking sources and controlling water exposure, you can decrease the likelihood of moss regrowth on your property. Regular maintenance of water sources and drainage systems is crucial in preventing moss from thriving on wet concrete surfaces.

Bottom Line

Consider trying environmentally friendly and cost-effective methods to remove moss from concrete before resorting to more aggressive solutions. When dealing with moss on your concrete surfaces, keep the following points in mind:

  • Prevent Moss: Regularly sweep and clean your concrete to prevent moss from taking hold.
  • Use Bleach with Caution: While bleach can kill moss effectively, it can also harm surrounding plants and grass.
  • Pressure Washer Option: A pressure washer can be a good tool to remove moss, but be cautious with the pressure to avoid damage.
  • Professional Removal Costs: Opting for professional removal may be more expensive, so try DIY methods first to save on costs.

Frequently Asked Questions on How to Clean Moss off Concrete

What is the best way to remove moss from concrete?

To effectively remove moss from concrete, you can use a solution of moss and algae killer following the manufacturer’s instructions. Alternatively, a mixture of bleach and water is also effective in getting rid of moss on concrete surfaces.

How can I ensure that the moss does not come back after cleaning?

To prevent moss from growing back on concrete areas, it’s essential to ensure proper drainage to avoid creating an ideal environment for moss growth. Regularly sweeping or using a stiff broom to remove debris that can enable moss growth is also recommended.

What are some tips to ensure my concrete stays moss-free?

Some maintenance tips to ensure your concrete remains moss-free include keeping the surface clean, removing any weeds and moss promptly, and using a hose to wash away any debris that may contribute to moss growth regularly.

Is it safe to use bleach to remove moss from concrete?

When using a solution of bleach and water to clean moss off concrete, it is important to wear goggles and follow safety precautions to ensure proper ventilation and protection from the cleaning solution.

Can moss be effectively removed using just a broom?

While using a broom can help remove superficial moss from concrete surfaces, for a more thorough cleaning, it is recommended to use a suitable cleaning solution and water to remove any remaining residues.

What is the process for removing moss from a concrete walkway?

To clean moss off a walkway, you can first remove any loose debris using a broom, then apply a moss-killing solution or a mixture of bleach and water to effectively eliminate the moss.

Are there any environmentally-friendly ways to remove the moss from concrete?

For a more eco-friendly approach, you can try using a solution of diluted vinegar to remove moss from concrete. You can spray the moss with the solution to kill the moss without harming the environment.

Photo of author


Ira Njoroge

Hey, I’m Ira Njoroge, the founder of MySpaceAffair. Early on in my life, I had a passion to embark on a mission to create a cleaner, and more organized household. With a bachelor's degree in engineering after graduating from the University of Maryland in 2015 and seven years as a General Contractor and professional cleaner, on top of my DIY Enthusiasm. I saw the need for a reliable information source for homeowners. My passion, diligence, experience, and hired professionals confirms the reliability of all the advice given in My Space Affair and I hope to provide you all with reliable and thorough content!