What Causes Cracks in Tarmac Driveways? How to Prevent Them

Tarmac driveways are a popular and cost-effective choice for many homeowners in Chertsey and across the UK. Known for their durability and smooth finish, they’re often expected to last years with minimal fuss. However, over time, even the best-laid tarmac can begin to show signs of wear—most notably, cracks. Understanding what causes these cracks and how to prevent them can save you from expensive repairs down the line.

Common Causes of Cracks in Tarmac Driveways

• Weather Extremes: Repeated freezing and thawing cycles cause the tarmac to expand and contract, leading to surface cracks.
  
• Poor Drainage: Standing water seeps into the surface and weakens the base layer, eventually causing the tarmac to crack or sink.
  
• Heavy Loads: Excessively heavy vehicles or frequent traffic can stress the surface, especially if the base was not constructed for that kind of use.
  
• Improper Installation: If the base is uneven or the mix ratio of the tarmac is wrong, the surface is more prone to failure.
  
• Tree Roots: Roots growing underneath the driveway can lift the tarmac, causing visible cracking or buckling over time.
  

How to Prevent Cracks from Forming

• Install a Proper Base: A solid, well-compacted sub-base is critical to the long-term success of your tarmac surface.
  
• Ensure Good Drainage: Properly graded surfaces and effective drainage channels will help direct water away.
  
• Avoid Excessive Loads: If your driveway isn’t built for heavy vehicles, try to avoid repeated stress in the same areas.
  
• Regular Maintenance: Sealcoating every few years can help preserve flexibility and prevent small cracks from turning into large ones.
  
• Trim Nearby Vegetation: Keep tree roots at bay with regular trimming or root barriers if necessary.
  

Conclusion

Cracks in a tarmac driveway aren’t just an eyesore—they’re an early warning sign of bigger issues to come. At NS Driveways Chertsey, we understand the local conditions in Surrey that can contribute to these problems and provide long-lasting tarmac solutions that stand up to the elements. If your driveway is showing signs of fatigue, don’t wait for things to worsen. Reach out to us today and let’s put a strong, smooth surface beneath your wheels once again.

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