Aside from being aesthetically unpleasant, weeds poking through sidewalks pose several threats to your asphalt, and family. If left unattended, the weeds will thrive, grow and can eventually create severe concrete deformations and heaving, which is only mended by tearing out the slab. Larger weeds are also tripping hazards, and will continue to reemerge after countless applications of herbicides. Manually eradicate the weeds before prepping the cracks and applying a quick-drying joint sealant.
Pack the crack tightly with sand before filling it with a quick-drying joint sealant. Cut the sealant’s tip and insert it directly into the crack. Squeeze the product into the crack and overfill to allow for the shrinkage that occurs after drying.
Dig out as much of the weed as possible before cleaning out any remaining dirt or debris from the crack with water and a stiff wire brush. Allow the concrete to dry before continuing.
Once you’ve gotten rid of the weeds in the first place, you want to prevent them form coming back. There are a couple easy things you can put between slabs to keep your driveway or patio permanently plant-free.
Note: if you live in a cold climate, you may note be able to seal every crack. Seams and edges between slabs are there on purpose to let the concrete expand and contract during temperature changes. Sealing these cracks can lead to more, worse cracks appearing over the spring thaw.
After all, weeds are only a problem because they’re so good at growing where they shouldn’t. They pop up in the most inconvenient places – the middle or your garden, throughout your yard, and worst of all, between slabs in your driveway or sidewalk.
Does Boiling Water Remove Weeds?
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If you have a serious weed problem in your driveway or patio, glyphosate can be an effective solution. Soil enzymes neutralize it, so it’s unlikely to hurt plants that you don’t spray it on. However, it’s still best to apply it carefully so you don’t drip or accidentally spray plants you want to keep.
Weeds leave your driveway and sidewalks looking a little ragged. Luckily, removing them can be simpler than you’d think.
The most immediately effective weed solution is glyphosate, which is the main ingredient in RoundUp. Of the commercial weed solutions, glyphosate is the safest. It’s also one of the most indiscriminate – it will remove any plant it touches. This includes your lawn and garden plants.
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This article was co-authored by Scott Johnson. Scott Johnson is the Owner and Lead Design Consultant for Concrete Creations, Inc., an award-winning landscape and design company based in the San Diego, California metro area. He has over 30 years of experience in the pool and landscape construction industry and specializes in large estate outdoor environment construction projects. His work has been featured in San Diego Home & Garden Magazine and on Pool Kings TV Show. He earned a BS degree in Construction Management with an emphasis in Architecture and CAD design from Northern Arizona University.
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Weeds are invasive plants that can overrun your desirable plants and cause damage to housing and yard materials. While some weeds are fairly easy to kill, they can be a bit tricky to remove when they sprout up through the cracks in your driveway, walkways, porch, or pavers. To kill the weeds growing in these cracks, you can use a variety of different home remedies or purchase a commercially-available weed killing liquid or device. You can also remove weeds from cracks by digging up the plants and their roots before sealing the cracks with concrete or gravel.