This affordable natural remedy clears green and black marks from your home’s walls
Keeping the outside of your home looking fresh can be a slog, especially when black or green marks start appearing on the walls. Those stains usually come from mould, algae or pollution. Thankfully, there’s a cheap and green fix that doesn’t call for harsh chemicals: a simple homemade mix of baking soda (99 g) and white vinegar (480 ml) diluted in lukewarm water (946 ml).
What’s causing those black and green stains?
Knowing what’s behind the marks helps you clean them properly and stop them coming back. Humidity, bad weather and pollution encourage mould and algae to grow. Walls that face north (they get less sun) or sit in shade are especially at risk because moisture sticks around longer there. If your property is in a generally damp area, those factors together raise the chance of mould and algae reappearing.
To tackle the problem head-on, use the precise amounts of baking soda (99 g), white vinegar (480 ml) and lukewarm water (946 ml) given above. This mix works as both a disinfectant and a degreaser and is especially good at removing stubborn stains. It lets you clean without damaging the wall surface and without harming the environment.
What to use and how to make the cleaning mix
You don’t need fancy kit—just everyday household tools. Have on hand a stiff brush or scrubbing broom, a sponge or sprayer for applying the solution, a push broom for heavier scrubbing and plenty of clean water for rinsing.
Make the solution by dissolving the baking soda (99 g) fully in the lukewarm water (946 ml), then add the white vinegar (480 ml) slowly and carefully (the mixture may foam slightly when the vinegar hits the baking soda, which is a normal reaction). Apply the solution liberally with a sponge or sprayer to the affected areas and leave it to sit for 30–60 minutes so the cleaning, antibacterial and antifungal properties can work on the mould and algae. After that, give the stains a good scrub with a stiff brush or push broom and rinse thoroughly with clean water to remove any residue.
How to stop stains coming back and why this eco option helps
To cut down on repeat staining, apply an anti-moss treatment after cleaning or consider a waterproofing solution for walls exposed to moisture. These steps noticeably reduce the chance of mould and algae coming back and help the results last longer.
This natural, pocket-friendly method has benefits beyond just cleaning. Unlike many commercial chemical products, this mix won’t harm nearby plants or animals, so it’s a sensible choice for both your home and the environment. Using this approach means you’re looking after your walls while also doing your bit for the wider ecosystem.
Why try a natural cleaner first
If you’d rather avoid the cost and possible drawbacks of chemical cleaners, this natural solution is a solid alternative. Experts recommend trying this method before repainting or buying costly commercial products — you might be pleasantly surprised by how well it works.
The process here is more than a quick spruce-up; it’s a sensible way to care for your home with the planet in mind. By adopting such eco-friendly practices, you can keep your property in good nick while protecting the world around you.