What are the best methods to clean biological growth from concrete benches?

Biological growth such as algae, mold, and moss can make concrete benches unsightly and slippery. Here are the best methods to restore their appearance and safety:

1. Pressure Washing – Use a pressure washer on a low setting to blast away algae and dirt without damaging the concrete surface.

2. Vinegar Solution – Mix equal parts white vinegar and water, spray on affected areas, and scrub with a stiff brush for eco-friendly cleaning.

3. Bleach Treatment – Apply a diluted bleach solution (1 part bleach to 4 parts water) to kill stubborn mold, then rinse thoroughly.

4. Commercial Cleaners – Use specialized concrete cleaners for tough stains, following manufacturer instructions.

5. Preventive Measures – Seal concrete benches annually to reduce moisture absorption and inhibit future biological growth.

Regular maintenance ensures your outdoor benches stay clean, safe, and visually appealing.