


Algae growth on patio slabs is not just an eyesore—it can also make surfaces slippery and potentially hazardous. If you’re tired of dealing with green, slimy patios, this guide will walk you through simple, effective steps to remove algae from patio slabs. For a hassle-free solution, we’ll also highlight the benefits of using Joint-It Algae Remover, a trusted product designed to restore your outdoor space to its pristine condition.
Algae thrive in damp, shaded areas where moisture collects. Your patio may be the perfect breeding ground due to:
Understanding the cause can help you prevent future algae outbreaks.
Manual cleaning is an effective way to start, especially if the algae buildup is light. Here’s how:
Sweep and Scrub:
Begin by sweeping your patio to remove debris. Use a stiff-bristled brush and warm soapy water to scrub the algae-covered areas.
Pressure Washing:
A pressure washer can blast away algae effectively. Use medium pressure to avoid damaging the slabs.
Natural Remedies:
Mix equal parts water and white vinegar, then pour it over the affected areas. Let it sit for 30 minutes before scrubbing with a brush.
If manual methods aren’t enough, consider using specialised products. One standout option is Joint-It Algae Remover, designed to target stubborn algae without damaging your patio.
Joint-It Algae Remover is a powerful, easy-to-use solution for removing algae from patio slabs. Here’s why it’s a popular choice among homeowners and professionals:
Fast and Effective:
Its professional-grade formula works quickly to break down algae, moss, and lichen, restoring the natural beauty of your slabs.
Long-Lasting Results:
Regular use not only removes existing algae but also helps prevent regrowth, keeping your patio clean for longer.
Easy Application:
Simply dilute the product as directed, apply it to the affected area, and leave it to work. There’s no need for scrubbing or rinsing in most cases.
Prepare the Area:
Remove any debris and sweep the patio surface thoroughly.
Dilute the Product (if you have purchased a 5L concentrate):
Follow our guidelines to mix the appropriate amount of Joint-It Algae Remover with water. Instructions are on the packaging.
Apply the Solution:
Use a sprayer, watering can, or brush to evenly apply the product over the algae-infested areas.
Wait:
Allow the solution to work its magic. Most algae will dissolve within days.
Optional Rinse:
For heavily soiled areas, rinse with water or lightly scrub for best results.
Once your patio is algae-free, keep it that way with these tips:
Ensure Proper Drainage:
Eliminate standing water by ensuring your patio has adequate drainage.
Regular Cleaning:
Sweep and wash your patio regularly to prevent algae from taking hold.
Sunlight Exposure:
Trim overhanging branches to increase sunlight exposure, which helps keep surfaces dry.
Apply Preventative Treatments:
Use Joint-It Algae Remover as a preventive measure to discourage algae regrowth.
Removing algae from patio slabs doesn’t have to be a time-consuming chore. With tools like Joint-It Algae Remover, you can tackle even the most stubborn growth easily and effectively. By following the steps above and adopting preventive measures, you’ll enjoy a clean, safe, and visually appealing patio all year round. If you’re struggling with issues like your concrete going green, read our guide on how to stop concrete going green here.
Ready to rejuvenate your patio? Try Joint-It Algae Remover today and see the difference!
Gary Duffy is Co-Founder of Joint-It and plays a key role in the company’s technical, product and commercial development. With a background in the paving and landscaping industry, Gary co-founded Joint-It in 2011 alongside Martin Fox, driven by a clear understanding of the practical challenges contractors face on site and the need for better-performing jointing solutions. That first-hand industry experience helped shape the development of Joint-It Simple and laid the foundations for the wider Joint-It range.
Since founding the business, Gary has been closely involved in product development, technical support and sales strategy, helping grow Joint-It from its early beginnings into an established manufacturer of jointing compounds and hardscape products serving the UK, Ireland and international markets. As Technical Director, he has also played an important role in the company’s international growth, including the development of distribution agreements in markets such as France, Italy, Sweden and Dubai.
Gary’s contribution remains closely tied to the practical side of the brand. Across Joint-It’s website and customer-facing content, he is a trusted technical voice on product selection, application advice, maintenance guidance and common paving challenges, reflecting the company’s focus on combining product innovation with real-world trade knowledge. Customer feedback also regularly highlights Gary’s technical expertise, responsiveness and hands-on support, reinforcing his longstanding involvement in the business.