Weed growth in surface cracks

We all know what an eyesore weeds can be in your garden, but they’re even more evident when disrupting surfaces like driveways and patios. When they appear through surface cracks, it can be a sign of deeper issues happening. Whether it’s the paths around your home or a large commercial driveway, unchecked weed growth can result in long-term damage and costly repairs.

As part of our series of resurfacing guides, here’s what you need to know about weeds in surface cracks.

What causes weed growth in surface cracks?

Weed seeds are highly resilient and can find their way into the smallest of cracks in materials like concrete and asphalt, especially if paving slabs are laid. Warm and wet conditions in the Springtime can encourage weeds to grow fast, coming through cracks across surfaces like driveways, paths and car parks. Cracks trap moisture and debris, accelerating weed germination. As the roots grow and expand, they can force cracks wider and deeper, making surfaces more vulnerable to damage.

Will weeds grow through concrete?

Weeds don’t grow through solid concrete, but via existing cracks or joints. However, once they take root in a small gap, their growth can appear as though they’ve pushed up from underneath the surface. If your patio or driveway is old, poorly laid, not maintained or lacking the proper sealing, it is more susceptible to weed infiltration.

Can weeds damage foundations?

Surface weeds won’t usually damage solid building foundations, as they aren’t strong enough. However, they can contribute to surface deterioration that leads to water ingress. This moisture can seep beneath a driveway or patio area, affecting underlying base layers that could even reach foundations if drainage is poor or your property is susceptible to ground movement. In freeze-thaw conditions, moisture continues to expand and contract, making cracks worse, resulting in further shifting and subsidence over time.

Why do weeds make surface damage worse?

Weeds are persistent, exerting pressure on the edges of existing cracks as the roots grow further. Some weeds have stubborn and deep roots that are difficult to remove cleanly, which is why you may see regrowth. Ongoing root expansion can damage the appearance of a surface and reduce its structural integrity. What started as a cosmetic issue can soon become a costly nightmare.

When does your patio or driveway need resurfacing?

If weeds are growing in multiple spots, or you see repeated cracks that are worsening each season, it may be time for resurfacing. This offers a cost-effective solution to repair surface damage, seal cracks and apply a fresh, weed-resistant layer. You’ll also get all the other benefits that come with new driveways, paths and patios, like uplifting the appearance of your outdoor spaces while ensuring surface durability. For long-term results, your patio surfacing expert will also check if base layers have been compromised and help you select high-quality surfacing materials.

Get a free resurfacing quote after weed damage

UK Surfacings Ltd is a resurfacing contractor in Surrey and South London, coming out to Redhill, Reigate and beyond. For a free quote, call 0800 859 5354.