How to prevent weeds in pathway joints

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Introduction

Pathways made of pavers, bricks, or stones add charm and structure to any yard—but the joints between them often become a breeding ground for weeds. Over time, these weeds not only ruin the appearance of your pathway but also weaken its structure by forcing pavers apart. The good news is that you don’t have to spend every weekend pulling weeds. In this guide, you’ll learn exactly how to prevent weeds in pathway joints using proven installation, cleaning, and maintenance techniques.

Why Weed Prevention Matters

Weeds in pathway joints are more than just unsightly:

  • Structural damage: Roots can shift pavers, causing uneven walking surfaces.
  • Safety hazards: Uneven or lifted pavers create tripping risks.
  • High maintenance: Constant pulling or spraying takes time and effort.
  • Reduced curb appeal: A clean, weed-free pathway enhances the look of your garden or driveway.
  • Longevity: Weed prevention helps pavers last longer by reducing joint erosion.

By taking the right steps early, you’ll protect your investment and keep your pathways looking fresh year-round.

Step-by-Step Guide to Preventing Weeds in Pathway Joints

Step 1: Proper Base Installation

Weed prevention begins before your pathway is even built.

  • Excavate the pathway area to a depth of 6–8 inches.
  • Lay landscape fabric over the subgrade to block weed roots while allowing water to drain.
  • Add 4–6 inches of compacted gravel or crushed stone as the base.
  • This creates a solid foundation and discourages weed growth from below.

Pro Tip: Never lay pavers directly on soil—this is the fastest way for weeds to invade.

Step 2: Use Polymeric Sand in Joints

  • After laying pavers or stones, sweep polymeric sand into the joints.
  • Mist lightly with water to activate the polymers, which harden the sand.
  • Once cured, this creates a semi-solid barrier that blocks weed seeds from germinating.
  • Unlike regular sand, polymeric sand doesn’t wash away easily and also deters ants.

Step 3: Seal the Pathway

  • Apply a paver sealer after installing polymeric sand.
  • Sealer locks in the joint material and reduces water penetration.
  • It also prevents dirt buildup, which is where weed seeds often take root.
  • Reapply sealer every 2–3 years for continued protection.

Step 4: Clean Regularly

  • Sweep pathways weekly to remove dirt, leaves, and debris where weeds may sprout.
  • Rinse with a garden hose or low-pressure washer occasionally to clear fine dust.
  • Remove any small weeds as soon as you spot them before they spread.

Pro Tip: Early intervention makes weed control much easier—don’t let seeds take root.

Step 5: Apply Natural Weed Deterrents

If weeds still manage to appear, natural solutions work well:

  • Boiling water: Pour directly onto weeds to kill roots.
  • Vinegar solution: Mix 1 part vinegar with 1 part water and spray on weeds.
  • Salt and soap: Add a small amount of salt and dish soap to vinegar for tougher weeds.

These methods are eco-friendly and avoid harsh chemicals that can damage nearby plants.

Step 6: Consider Alternative Joint Fillers

For decorative or eco-conscious pathways, try different joint fillers:

  • Gravel or crushed stone: Creates a rustic look while discouraging weeds.
  • Moss or ground cover plants: Plant low-maintenance greenery that outcompetes weeds.
  • Resin-bound jointing compounds: Flexible, long-lasting fillers that resist weed growth.

Step 7: Maintain Drainage Around Pathways

  • Poor drainage creates damp conditions where weeds thrive.
  • Ensure the pathway has a slight slope to shed water.
  • Add drainage channels or gravel borders to prevent pooling.

Common Mistakes to Avoid

  • Mistake 1: Skipping Landscape Fabric
    Without a barrier, weeds grow up from the soil beneath.
    Solution: Always install landscape fabric before adding the gravel base.
  • Mistake 2: Using Regular Sand in Joints
    Plain sand washes out and creates the perfect environment for weeds.
    Solution: Use polymeric sand or resin-based fillers.
  • Mistake 3: Letting Debris Build Up
    Organic matter in joints encourages weed seeds to germinate.
    Solution: Sweep pathways weekly and rinse as needed.
  • Mistake 4: Overusing Harsh Chemicals
    Excess herbicides damage pavers, soil health, and nearby plants.
    Solution: Stick to natural or targeted treatments for spot control.
  • Mistake 5: Ignoring Early Weed Growth
    Small weeds quickly spread and lift pavers.
    Solution: Remove weeds immediately before they establish deep roots.

Extra Pathway Tips & Hacks

  • Install Edging: Use stone, steel, or concrete edging to keep pavers tight and minimize shifting gaps.
  • Seasonal Maintenance: Inspect after winter for frost heave, which may loosen joints and invite weeds.
  • Re-Sand Annually: Top up polymeric sand as needed to keep joints firm.
  • Mulch Borders: Mulch around the pathway reduces weeds spreading inward.
  • Try a Pressure Washer with Caution: Use a fan nozzle to clean without blasting sand from joints.

For more ideas, check out our guide on how to install pathway lighting for safety, which adds both functionality and style alongside a well-maintained, weed-free pathway.

Conclusion

Weeds in pathway joints are a common frustration, but they don’t have to be a permanent problem. By building with proper foundations, using polymeric sand, sealing surfaces, and maintaining them regularly, you can keep your pathway clean and weed-free. Natural treatments provide backup solutions when stubborn weeds appear, ensuring your walkway always looks polished and inviting.

Pro Tip: Think prevention, not reaction. A well-built, regularly maintained pathway will stop weeds before they start—saving you time, money, and effort in the long run.