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Cleaning Red Streaks on Rendered Walls

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  • Post published:April 14, 2021
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Render is a standard exterior for buildings. It’s a practical method of sealing a structure’s surface against the elements while also changing its aesthetic appearance. Instead of paint, render involves applying a mixture of wet cement and sand “type material” to the outer walls.

While this is a great way to fortify your home’s exterior against severe weather and water damage, some common problems can arise. In this article, we discuss Cleaning red streaks on rendered walls.

One of these is the appearance of red stains, marks, or streaks on rendered walls. These streaks can be unsightly and drive down your property’s value.

If you’ve noticed red stains on your home or business’s rendered walls, you’ll want to know what causes these marks and how to get rid of them without damaging the structure. Don’t worry— we’ve got you covered! Read on to learn all about cleaning red streaks on rendered walls.

What Causes Cleaning Red Streaks on Rendered Walls?

Mistaking red stains on rendered walls for something else, such as rust or silicone runoff, is easy. However, these streaks are manifestations of algae growing on the outside of the walls. Humid environments or rainwater trickling down the sides of your home provide sources for algae with the moisture it needs to flourish.

Certain types of algae can be hazardous. However, the algae typically found on render are not harmful to humans. They won’t cause excessive damage to your home, either. That said, the stains are not pleasant to look at. And they can become an obstacle if you want to sell your home.

Top TIPS on  Cleaning Red Streaks on Rendered Walls

Algae infestation on outdoor render walls is a problem that can be difficult and time-consuming to deal with. Algae growth is caused by moisture and humidity. Meaning it’s not something that can’t be ignored. If left untreated, the algae can cause permanent staining to the render surface, making it necessary to take action as soon as possible. Luckily, there is a straightforward solution to the problem of algae on rendered walls.

You’ll need a specialist biocide to kill and remove the algae. This is applied at relatively low pressure not to damage the render.

The active ingredient we are looking for in any Biocide brand is DDAC. This is the “go to” product for cleaning red streaks on rendered walls. Read the label for the list of active ingredients.

DDAC, also known as Didecyl dimethyl ammonium chloride, is an active ingredient in BIOCIDE, a disinfectant. It is widely used in the cleaning and hygiene industries due to its efficiency and effectiveness against bacteria, moulds and fungi. In fact, DDAC has been proven to be a powerful antimicrobial agent with the ability to kill microorganisms within minutes. Furthermore, DDAC is environmentally safe and non-toxic when used properly.

We recommend consulting a professional if you have concerns about damaging the exterior. You want to apply only a little pressure, and selecting the right biocides for the specific algae strain can be a tricky task best left to the pros.

What About Painting Over the Stains?

Painting over the red streaks might be a temporary solution, but it won’t keep the algae from returning. It will continue to grow under the paint, and the red marks will eventually return to the outside of the rendered walls. At this point, it will be more challenging to clean off because a layer of paint will be in the way.

Algae can plague any surface it finds, even walls. It is a severe issue because its presence is both unsightly and potentially dangerous. While painting over the algae may seem like an easy solution, it is far from permanent. Painting over algae on walls can worsen the problem in the long run. For these reasons, we strongly advise against painting over the algae. Instead, we suggest cleaning the walls and killing the algae to ensure it doesn’t return.

Conclusion about Cleaning Red Streaks on Rendered Walls

Cleaning red streaks on rendered walls will restore your home and maintain its curb appeal. If you’ve noticed red stains on your rendered walls, get in touch to find out how we can help.