Moss and algae might seem harmless at first, but they can quickly take over your interlocking walkway. The result is a slippery, stained, and uneven surface that creates a potential hazard for anyone walking over it. These growths thrive in shaded, damp environments, especially between pavers where moisture lingers. If left untreated, they can make your walkway unsafe and speed up wear and tear. Fortunately, there are simple ways to clean the surface and keep your interlock looking its best.
Understand Why Moss and Algae Grow
Moss and algae grow in areas with moisture, shade, and limited airflow. Interlocking walkways that sit under trees or near garden beds often stay damp longer. This creates the ideal environment for unwanted growth. Recognizing these conditions is the first step toward prevention.
Sweep and Dry the Area
Begin by clearing the surface of leaves, dirt, and other debris using a stiff broom. This not only makes cleaning easier but also allows you to see where moss and algae are most concentrated. If possible, let the area dry out for a day or two before treatment. Moss is easier to remove when dry and flaky.
Use a Gentle Cleaning Solution
Mix equal parts white vinegar and water, or choose a store-bought moss and algae remover made for outdoor surfaces. Avoid using bleach or harsh chemicals, which can discolor or damage the pavers. Apply the solution with a spray bottle or watering can, and allow it to soak for 15 to 30 minutes.
Scrub and Rinse Thoroughly
After soaking, scrub the walkway with a stiff-bristle brush, focusing on the joints and textured areas. Once the moss and algae are loosened, rinse the area with a garden hose. Be cautious with pressure washers. Direct, high-pressure streams can dislodge joint sand or shift the pavers out of place.
Repair or Replace Missing Joint Sand
Cleaning often displaces the sand that holds your pavers in place. Reapply polymeric sand to any joints that look empty or unstable. Sweep the sand into the joints and lightly mist it with water to help it harden and lock in place.
Improve Drainage and Sunlight Exposure
Moss and algae will keep returning if the conditions do not change. Trim nearby branches to increase sunlight and improve airflow. If water tends to pool on or near the walkway, correct the slope or drainage to help the area stay dry. These simple changes make it harder for moss to grow again.
Keep Your Walkway Clean and Safe
Moss and algae are more than just cosmetic issues. They can create slippery surfaces and accelerate damage to your interlock. With regular cleaning and a few preventive adjustments, you can keep your walkway safer and more attractive. If your walkway is already uneven or showing signs of wear, cleaning alone might not be enough.
When Is It Time to Replace Your Interlock Walkway?
While cleaning moss and algae can refresh the look of your walkway, it may not solve deeper issues. If the surface is uneven, pavers are shifting, or the structure feels unstable underfoot, cleaning is only a temporary fix. Here are signs it may be time to consider full replacement:
- Large sections of the walkway have sunk or lifted
- Multiple pavers are cracked, chipped, or missing
- Joint sand is missing throughout, causing loose or wobbly stones
- Drainage problems are leading to recurring moss, pooling, or erosion
- Previous patch jobs have failed or made the surface uneven
Need to Replace a Damaged or Outdated Interlock Walkway?
If moss, algae, or years of wear have left your interlocking walkway looking uneven, worn out, or beyond repair, it may be time for a full replacement. Nortown Paving & Construction provides professional interlock removal and replacement for homeowners across the Greater Toronto Area.
Call (905) 761-7315 today to schedule your free on-site assessment and upgrade your walkway!
