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bent sandstone walls made of stone blocks serve as design elements, retaining walls, or seating areas, seats for park visitors. benches made of horizontal wood plank boards

Why is My Retaining Wall Turning Green?

Retaining walls play a pivotal role in enhancing the aesthetic appeal of a property. They are not only designed to enhance the terracing design but are also practical in supporting the soil and managing rainwater runoff.

They’re an excellent choice for landscaping, but the problem is that they can quickly become home to unwanted guests. I’m talking about moss, and if left unaddressed, it can become a major issue.

In this article, we will discuss why moss begins to grow on untreated or improperly maintained retaining walls.

What Causes Moss to Grow on My Retaining Wall?

Moss is a common problem for homeowners who have retaining walls. A retaining wall is a perfect habitat for moss: it’s cool, damp, and shaded. Moss typically grows on surfaces that are moist, and it feeds on airborne nutrients that can quickly settle on the wall.

The primary contributing factors to moss growth are lack of sunlight, moisture buildup, and high humidity levels. The outcome is a permanent green stain that can make the retaining wall resemble an abandoned building.

Poor Construction

Poor construction practices also contribute to the formation of moss on retaining walls. Construction practices like incorrect drainage or inadequate soil compaction can lead to a lack of oxygen in the soil. This can easily cause moisture to build up, making it easier for moss to spread. If the retaining wall is built next to a natural waterway, the problem is exacerbated since the water promotes moss growth due to increased humidity levels.

Improper Maintenance

Improper maintenance is another significant factor in the growth of moss on retaining walls. If a homeowner neglects to clean their wall, dirt and dust can accumulate, and moss will begin to thrive in this near-perfect environment. A homeowner who wants to prevent the growth of moss should proactively take care of the wall by regularly washing it or hiring a professional power washing service.

How Can I Prevent Moss Growth on My Retaining Walls?

Preventing moss growth on retaining walls can be challenging as once it has developed, it’s not easy to eliminate.

Homeowners often make the mistake of using bleach to remove or eliminate moss growth. However, bleach can be corrosive and can significantly damage certain wall materials.

The best course of action is to use a specialized cleaner that’s designed specifically for moss. This cleaner will be gentle on the wall’s material and will be effective in removing the moss growth itself. You can also use a mixture of equal parts water and vinegar. Spray this solution on and wait for about 15- 20 minutes, then wash it off. This should kill the moss within a few hours, allowing you to scrub it off the wall.

Power washing is another great and quick way to remove moss.

Professional Retaining Wall Services

Moss is a problem typically seen on improperly constructed, installed, or maintained retaining walls. The prevention of moss growth begins with the construction of the wall by using proper drainage techniques, perfect soil compaction, and avoiding placing the wall in natural waterways. Once the wall has been installed, keeping it clean and dry maximize its lifespan and reduces the risk of moss growth.

As a homeowner, it’s critical to address the problem of moss growth from the onset rather than neglecting it and having to deal with it later. Regular maintenance and cleaning can help you prevent moss from growing on your retaining wall, ensuring that your home always looks its best.

At A&N Lawn Service, we serve as your top choice for retaining wall contractors in Pittsburgh and are dedicated to keeping your retaining walls sturdy and looking their best. Contact us today to learn more!

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