Getting rid of lichen from concrete can feel like scrubbing away years of stubborn grime. It clings to surfaces like a stage-five clinger, but don’t worry. With the right methods and a bit of elbow grease, your concrete can look fresh and clean again. Here are five easy ways to tackle that pesky lichen.
1. Apply a Vinegar and Water Solution
Vinegar isn’t just for salads. Mix equal parts vinegar and water in a spray bottle and spritz it generously onto the lichen-covered concrete. Let it sit for about 20 minutes. The acidity will start breaking down the lichen. Scrub the area with a stiff brush, rinse it off, and you’ll see the difference. It’s a cheap, natural solution that works wonders.
2. Pressure Wash the Concrete Surface
If lichen were a villain, a pressure washer would be its nemesis. Fire up that pressure washer and blast away the lichen with ease. Move the nozzle in a sweeping motion to cover all areas. Be careful not to damage the concrete with too much pressure. It’s quick, effective, and even a bit satisfying to watch.
3. Apply Diluted Bleach and Scrub
Bleach is a heavy hitter in the cleaning game. Mix one part bleach with four parts water and apply it to the lichen. Let it sit for 15 minutes. Grab a stiff brush and start scrubbing. The bleach breaks down the lichen while disinfecting the surface. Just make sure to rinse thoroughly and wear gloves unless you enjoy dry, irritated hands.
4. Use a Wire Brush for Stubborn Lichen
Sometimes, brute force is the answer. Take a wire brush and go to town on the lichen-covered concrete. It’s a bit of a workout, but it gets the job done. This method is perfect for smaller areas or when lichen laughs in the face of other treatments. Plus, you might get some bonus arm muscles out of it.
5. Pour Boiling Water Directly on Lichen Spots
Boiling water isn’t just for pasta. Carefully pour it directly onto the lichen-covered concrete. The heat kills the lichen almost instantly. After a few minutes, scrub the area with a brush to remove any remaining residue. It’s simple, eco-friendly, and a little bit dramatic, but it works like a charm every time.
Jamie is the founder of The Backyard Pros. When he was 15 years old he started working at a garden centre helping people buy plants, gardening products, and lawn care products. He has real estate experience and he is a home owner. Jamie loves backyard projects, refinishing furniture, and enjoys sharing his knowledge online.