How to Prevent Weeds from Growing Between Pavers: 8 Proven Methods That Work

Knowing how to prevent weeds from growing between pavers saves you time and effort. The best way is to create a strong barrier below and between the pavers. This keeps weed roots from reaching sunlight and moisture, which they need to grow.

Dig down at least 6 to 8 inches. Lay a base of gravel and sand. Compact this base well before placing your pavers.

Then use polymeric sand or a high-quality joint material to fill gaps tightly. This creates a lasting seal that blocks weed seeds from settling in.

Regular maintenance also helps. Clean your pavers regularly. Reseal them every 2 to 4 years.

This keeps joints tight and protected. This stops tiny cracks or gaps where weeds could sprout over time.

1. How to Prevent Weeds Growing Between Pavers Permanently

Stopping weeds between your pavers starts with choosing the right joint filler. Polymeric sand works best because it hardens and blocks weed seeds from settling. Sealing pavers adds a protective layer.

It keeps moisture and dirt away. This helps stop weeds from growing.

Regular maintenance is key to keeping weeds at bay. Dirt and debris accumulate in the joints and create a perfect spot for seeds to sprout. Clean your pavers every few months.

Reapply sealant every two years or so. This depends on wear and weather.

Follow these steps to prevent weeds growing between your pavers effectively. This routine combines proper materials and maintenance for long-term results.

1. Clean the paver surface and joints thoroughly. Use a broom and a pressure washer to remove loose dirt and plant debris.
2. Apply polymeric sand into the narrow joints. Spread a thin layer, then sweep it off the surface.
3. Activate the polymeric sand. Lightly mist water on the sand to make it harden and lock in place. Avoid over-wetting to prevent washout.
4. Seal the pavers with a high-quality sealant.Use a roller or sprayer to apply sealant. Cover joints and surfaces fully. This blocks moisture and dirt from settling.
5. Inspect and clean the pavers regularly. Every 3 to 6 months, remove leaves, dirt, and early weed sprouts.
6. Spot treat any new weeds immediately. Use boiling water or a propane weed torch cautiously to kill weeds without chemicals.
7. Reapply sealant every 2 to 3 years as needed. This keeps the surface protected and the joints stable.

Polymeric sand costs $20 to $30 per 5-pound bag. One bag covers 50 to 100 square feet. Coverage depends on joint width.

Sealers cost between $40 and $60 per gallon. One gallon usually covers 100 to 200 square feet. Prices depend on sealer quality.

Doing the job right can take a weekend for an average patio. Skipping sealing or cleaning lets dirt build up and weeds take root, undoing your work fast.

2. Why Weeds Thrive Between Pavers and What Causes It

Weeds grow between paver joints because the spaces trap dirt. They also hold moisture and bits of organic debris. This combination creates a good spot for weeds to start.

These gaps create a perfect seedbed where weed seeds settle and begin to sprout. Rain or irrigation can wash out joint sand.

This leaves room for soil and organic matter. Those conditions help weeds grow more easily.

Drainage plays a big role too. Poor drainage keeps the joints damp longer, giving weed seeds a better chance to germinate. Moist conditions combined with sunlight create an ideal environment for weeds.

Water that pools or soaks into joints without drying fast gives weeds moisture. This moisture helps weeds grow strong.

The base beneath the pavers also affects weed growth. But mostly if it wasn’t prepared right. Without a firm, compacted base, soil can move up through cracks.

A layer of landscaping fabric helps stop this movement too. Soil moving up gives weeds a place to grow.

Weeds don’t usually grow from under well-installed pavers. But poor base work can allow dirt to slip through and settle in the joints.

Keeping the joints free from loose soil and organic debris cuts off weed growth. Regular sweeping removes potential seedbeds, stopping weeds before they start. Fixing cracked or loose joints helps stop weed growth.

Tight, well-filled joints leave less space for seeds. This makes it harder for weeds to take root.

Regular sweeping to clear soil and debris between pavers can greatly reduce weed growth over time.

3. Choosing the Right Joint Material: Polymeric Sand vs Alternatives

Polymeric sand is a fine mix of sand and additives that hardens with water. It creates a semi-rigid bond that locks pavers in place and blocks weed growth. This sand resists washout and keeps seeds from settling in loose gaps.

Regular sand and gravel fill joints but don’t harden or hold tight. That leaves spaces for weed seeds to settle and grow. These materials cost less but require more upkeep to control weeds over time.

Low-growing ground cover plants, like creeping thyme or moss, can fill joints too. They provide a natural barrier that competes with weeds. Ground covers need care, sunlight, and space to grow well.

Without these, they can die back. That leaves room for weeds to grow.

Sweep polymeric sand into dry joints for best results. Compact the sand well. Spray water lightly to activate it.

Avoid overwatering to prevent washout of the sand. Sealing the pavers after installation helps keep polymeric sand locked in place longer.

Regular sand or gravel are cheaper but need frequent refilling and weed control. They are best for lower-traffic areas or short-term fixes.

Ground cover plants add beauty but require ongoing watering and pruning. Choose materials based on your budget, time, and desired weed control level.

4. Preparing the Base: Essential Steps to Stop Weeds at the Root

Laying a strong base under your pavers stops weeds from growing up. Dig deep enough to remove topsoil and lay gravel that’s solid and well compacted. Adding a weed barrier fabric can also block weed roots and make maintenance easier.

Excavating the Base Soil Properly

Dig at least 6 to 8 inches deep to remove all loose soil and organic debris. Dig down about 6 inches to make space for gravel.

This lets you pack the ground well. Packed ground keeps weeds from growing.

A well-excavated base also helps pavers stay level and stop sinking over time. Hard soil or clay may need extra digging to reach the right depth.

Installing Weed Barrier Fabric Correctly

After excavation, lay a quality geotextile weed barrier fabric across the entire base. The fabric blocks weed roots from passing through.

It also keeps soil and gravel separate. This helps keep your gravel clean.

Make sure to overlap edges by several inches to block weeds from sneaking through gaps. Pin the fabric down securely to keep it in place during gravel spreading.

Gravel and Stone Dust Compaction Techniques

Put down 4 to 6 inches of coarse gravel first. Then add 1 to 2 inches of stone dust or sand on top. Compacting each layer tightly keeps the base stable and weed-resistant.

Use a plate compactor to press down the gravel and stone dust. Compact each layer until it feels solid underfoot and doesn’t shift when you walk on it.

Final Leveling Before Laying Pavers

Once compacted, rake the top layer to an even, smooth surface. Check that the base slopes away from buildings for drainage to avoid water pooling under pavers.

Final leveling ensures your pavers sit flat and close together. This limits open spaces where weeds could take hold later. Here’s what to do step-by-step to prepare your base properly:

1. Mark the area and remove all existing plants and debris.
2. Excavate soil to a depth of 6 to 8 inches using a shovel or excavation tool.
3. Compact the soil bottom lightly with a tamper to create a firm surface.
4. Lay down weed barrier fabric, overlapping edges and pinning it securely.
5. Spread 4 to 6 inches of coarse gravel evenly over the fabric.
6. Compact the gravel firmly with a plate compactor or hand tamper.
7. Add 1 to 2 inches of stone dust or sand, then compact again.
8. Level the surface with a rake so it’s flat and slopes away from structures.

5. Using Natural and Chemical Methods to Kill Existing Weeds

You can safely kill existing weeds between pavers using natural or chemical methods. Natural options like vinegar or boiling water work well for spot treatments. Chemical herbicides suit tougher weeds but need careful use to avoid damage.

Natural Solutions: Vinegar, Salt, Boiling Water

Horticultural vinegar with 20% acetic acid kills weeds quickly but can damage light-colored pavers. A safer option mixes regular white vinegar and water. Use 5%-10% white vinegar.

Spray this on weed leaves. You should remove top leaves first for better absorption.

Boiling water is an inexpensive and effective way to kill weeds without chemicals. Pour it slowly into cracks to scald roots while avoiding nearby plants. Salt is less recommended since it can harm soil and nearby vegetation.

• Use vinegar spray on young weeds during warm, dry weather
• Apply boiling water carefully to target patches of weeds only
• Avoid salt in areas with plants you want to keep
• Repeat treatments every few days for stubborn weeds
• Protect light-colored or natural stone pavers from vinegar etching

Boiling water won’t stain or etch your pavers. Be careful not to burn yourself. Keep boiling water away from nearby plants.

Chemical Herbicides Suitable for Pavers

When natural methods don’t cut it, use chemical herbicides designed for cracks in pavers. Look for selective weed killers labeled safe for patios and driveways. Pre-sprouting weedicides prevent new seeds from germinating while post-germination options kill existing plants.

Apply herbicides with a narrow nozzle or brush for precision. Avoid over-spraying to protect nearby plants and avoid chemical runoff. Check manufacturer instructions for dosage and drying times to ensure safety and effectiveness.

Using Flame Weeders Safely

Flame weeders kill weeds by using heat between pavers. They work well on young perennials. Annual weeds also respond to flame weeders.

Pass the flame quickly over weeds without lingering too long to prevent damaging pavers or joints. It’s best done on dry days before seeding seasons.

This method avoids chemicals but requires caution to prevent fire hazards. Keep a water source handy and clear flammable debris from your work area. Avoid flame weeding near flammable surfaces, like wood decks or dry mulch.

Precautions and Environmental Considerations

Always protect yourself with gloves and eye protection during herbicide application. Keep pets and children away from treated areas until the product dries or the area cools. Avoid applying weed killers before rain to reduce runoff into soil or drains.

Consider the impact on surrounding plants; natural methods usually cause less harm. Chemical herbicides can affect nearby grass or flowers if not carefully applied. Follow local guidelines and regulations on herbicide use in residential areas.

6. Maintaining Your Pavers to Keep Weeds Away Long Term

Maintaining your pavers means regular cleaning, re-sanding, sealing, and careful washing. You want to keep debris out of the joints and the polymeric sand intact. This stops weeds from getting a foothold over time.

Regular Sweeping and Debris Removal

Sweeping your pavers every 1 to 2 weeks keeps loose dirt and seeds from building up. Use a stiff broom to reach into the cracks and remove trapped debris. This limits the thin layer where weed seeds can settle and sprout.

Check your joints every few months for signs of sand loss or debris buildup. Pull any weeds you see as soon as they appear to avoid root growth beneath. A quick sweep after windy days or storms also helps reduce buildup.

Re-Sanding Paver Joints Correctly

Refill your joints with premium polymeric sand once a year or whenever you spot gaps. Old sand tends to wash out or break down, letting weeds grow. Sweep out loose, old sand and debris first before refilling.

After cleaning, fill the gaps with polymeric sand in thin layers. Compact the sand with a plate compactor or rubber mallet. Push the sand deep into the joints.

Make sure the area is even and firm. Mist the surface lightly with water to activate the sand and harden it in place.

• Sweep out old sand and debris before refilling
• Apply polymeric sand in thin layers, compact well
• Dampen sand lightly after application to harden
• Allow joints to dry fully before walking on pavers
• Inspect again in 3 to 6 months for needed touch-ups

Doing this keeps all gaps sealed tightly against weed roots. Avoid overwatering the sand or your activation won’t work properly.

Resealing Pavers: When and How

Sealing your pavers every 2 to 4 years helps stop weeds by blocking seed settlement. The sealer forms a thin, protective barrier over the surface and joints. This reduces moisture absorption where weeds thrive.

Make sure your joints are clean and dry before sealing. Apply a good paver sealer with a pump sprayer or roller.

Do this in mild weather between 50°F and 85°F. Avoid very hot or cold days. Two thin coats work better than one heavy coat.

• Seal every 2 to 4 years in dry, warm weather
• Clean and dry pavers fully before application
• Use a pump sprayer or roller for even coverage
• Apply two thin coats rather than one thick coat
• Let each coat dry for at least 2 hours

Skipping sealing speeds joint sand breakdown and invites weeds back. Poor sealing lets dirt pack into cracks, giving weeds a place to grow.

Pressure Washing Dos and Don’ts

Pressure wash your pavers once a year to blast out dirt and weed seeds. Use a wide spray nozzle for cleaning at 1500 to 2500 PSI. This cleans well without harming the sand joints.

Keep the pressure steady for best results. Keep the nozzle 12 to 18 inches from the surface.

Don’t focus the stream directly into the joints or hold it too close. That can blow sand out and create gaps for weeds. Let the joints dry completely after washing before you apply any sealers or sand.

• Use 1500, 2500 PSI with a wide-angle nozzle
• Hold nozzle 12 to 18 inches away from pavers
• Avoid spraying directly into joints to prevent sand loss
• Pressure wash annually or as needed for dirt buildup
• Allow joints to dry fully before resealing or re-sanding

Caring for your pavers like this extends their life and keeps weeds gone. You avoid rebuilding joints more often and enjoy a cleaner, safer outdoor space.

7. Planting Ground Covers: An Alternative Approach for Gaps

Low-growing plants like creeping thyme can fill gaps between pavers and stop weeds naturally. Creeping thyme grows best in full sun and well-drained soil. It suits patios and driveways with bright sun.

These plants make tight mats that block weed seeds. They stop sunlight, which weeds need to grow.

Choosing the right ground cover depends on your conditions. Your space is mostly sunny and drains well. Creeping thyme will do well there.

For shady areas, pick Irish moss or mondo grass. They grow low and spread thick. These plants are low maintenance since they need little watering and tolerate foot traffic.

Planting ground covers between pavers requires some prep work. Clear out loose debris and weeds first. Then, loosen the soil in the joints and water lightly.

Space plants to fill gaps, about 6 to 12 inches apart. The distance depends on the type. After planting, mulch the area with gravel or sand to keep weeds down and retain moisture.

• Use creeping thyme in sunny, well-drained gaps
• Choose shade-tolerant moss or mondo grass for shadier areas
• Clear weeds and debris before planting ground covers
• Loosen soil in gaps and space plants 6 to 12 inches apart
• Water lightly after planting and keep soil moist until established
• Apply mulch like gravel or sand to reduce new weeds
• Trim the ground cover occasionally to maintain neatness

Creeping thyme can flower, adding fragrance and color to your paving. Its dense growth leaves few spots for weeds to take hold. After a few months, these plants need little care.

Just trim sometimes to keep edges tidy. Avoid heavy foot traffic until the plants are established, usually about two months.

Very wide gaps might need extra soil or sand before planting. This helps plants grow better. Check for shifted pavers often.

Uneven surfaces can show soil and let weeds grow. Regularly check and adjust pavers. This helps ground cover block weeds better.

8. Common Mistakes and How to Fix Persistent Weed Problems

Weeds keep coming back between pavers because you pull the top plant but leave open joints. Loose joints fill with dirt and seeds, which grow again fast. Ordinary sand also washes out easily, letting gaps form and new weeds sprout.

Poor base preparation causes settling that cracks joints, inviting weeds even after treatment. Your joint material looks washed away or uneven.

The pavers need fixing. Trying to patch without proper base or sealing will not hold weeds back long.

You can repair damaged joints by fully cleaning out old sand or polymeric sand. Then refill with polymeric sand, which hardens to block weeds and stops washing out. Wet the polymeric sand thoroughly after spreading.

Apply a sealant on top of pavers every 2 to 3 years. This keeps joints tight. It also protects them from wear and weeds.

Always wet polymeric sand after application to ensure it hardens and seals the joints fully.

Here’s a checklist for fixing and preventing persistent weed problems:

• Clear all debris and loose material from joints before refilling
• Use only polymeric sand, not ordinary sand, to fill joints
• Wet polymeric sand immediately after spreading, following package directions
• Reseal pavers every 2 to 3 years to maintain a protective layer
• Inspect and refill joints annually to keep them tight and weed-free
• Check base stability for cracks or settling before fixing joints
• Remove any root growth before sealing to prevent lifting or warping

Severe or recurring weed problems mean you should hire a professional. They check the base and joint work carefully. This can save you time and effort.

They can identify hidden damage or poor drainage causing the problem. Professionals also have tools to remove old joint material fully and reseal pavers correctly.

Step-by-Step Action Plan to Keep Weeds Out of Your Pavers

Follow these steps to stop weeds between your pavers for good. Check each step carefully to see it worked before moving on.

1. Before you start: Remove all existing weeds by pulling or using a safe weed killer. Healthy pavers don’t hide roots or seeds.
2. Day 1: Dig out the joints between pavers, then fill them with polymeric sand. Wait 24 hours to let it harden fully.
3. Week 1: Check for any loose sand or cracks and reapply polymeric sand if needed. Smooth, solid joints block weed growth.
4. Week 2: Spray vinegar or a natural weed killer around the borders. Keep weeds from creeping in from the edges.
5. Month 1: Sweep your pavers regularly to remove dirt and seeds. Clean joints don’t give weeds a home.
6. Every 3 months: Inspect joints and touch up polymeric sand where it erodes. Keep joints tight to shut out weeds.
7. Every 6 months: Trim back any plants or grass near your pavers. Remove shade and debris that help weeds grow.

Frequently Asked Questions

Is October Too Late to Spray for Weeds?

October is not too late to spray for weeds. Fall treatments can weaken weeds before winter, reducing their spring growth. Just use an herbicide suited for the season and follow label directions carefully.

Can I Skip the Gravel and Just Use Sand Under Pavers?

Skipping gravel isn’t recommended under pavers. Gravel creates drainage and a stable base, preventing shifting and weed growth. Sand alone won’t provide enough support or keep weeds from coming up.

Can I Sprinkle Table Salt to Kill Weeds?

Using table salt can kill weeds but it’s risky. Salt harms nearby plants and soil health, making it a poor long-term solution. Use vinegar or commercial weed killers designed for pavers instead.

What Is Best to Fill the Gaps Between Pavers?

Polymeric sand is best to fill gaps between pavers. It hardens to block weed growth and stops ants from making tunnels. Avoid loose sand that washes away or lets weeds grow.

How Do I Stop Weeds from Growing Between Pavers?

Stop weeds by properly preparing the base and using polymeric sand. Seal joints after installation and clean the area regularly. These steps prevent weed seeds from settling and growing.

Can I Use Landscape Fabric Under Pavers to Prevent Weeds?

Yes, landscape fabric under pavers blocks weed roots from growing up. It acts as a barrier while letting water drain. Do not skip this step when installing new pavers for best results.

Key Points to Remember

Stopping weeds between your pavers takes steady effort and the right materials. Start by treating existing weeds and sealing joints carefully. Keep an eye on the gaps and fill them promptly to keep weeds away long term.