Causes and Repair Options for Crumbling Asphalt Driveway Edges

Causes and Repair Options for Crumbling Asphalt Driveway Edges

Causes and Repair Options for Crumbling Asphalt Driveway Edges

Do you notice crumbling on your asphalt driveway edges? The good news is that a crumbling asphalt edge on your driveway is mainly an appearance problem and doesn't usually affect the structural integrity of your driveway. However, you probably don't want to leave it alone since it can be pretty unattractive. Fortunately, the edges are repairable. Additionally, our experts on crushed asphalt in Fort Worth, TX, confirm that you can avoid the issue from occurring a second time by understanding why the edges crumbled.

Asphalt edges can crumble for a combination of causes, but the result is always the same — a weakened edge that is both unattractive and unstable.

Thin pour

A thinly poured edge, especially if exposed and extends beyond the compacted gravel base, is more likely to crumble from usage and weathering. Therefore, when properly run, the edge of your asphalt drive should taper down slowly to the ground, meeting the surface just shy of the edge of the gravel base. Then, a bit of soil and possibly the local turf is allowed to cover the thinnest edge, which supplies protection from crumbling.

Mechanical damage

Mechanical damage can result from driving on the very edge of the driveway. Over time, the vehicle's weight causes the asphalt to crumble. Constant pressure from heavy vehicles can also flatten the boundary over time so that it extends beyond the gravel base, thus leading to a thinner edge and pronounced crumbling.


The very edge of the asphalt and gravel base shouldn't have exposure to the elements, which is why the soil is usually pulled over it. Exposure typically occurs due to over-edging the lawn along the verge of the drive. Once exposed, water runoff along the driveway's edge can wash out the gravel base so that the asphalt overhangs the soil, thus leading to crumbling if any pressure is positioned on the paving.

Fortunately, you do not need to replace the entire driveway simply because the edge is weak. In most cases, you can repair crumbling edges successfully. You have two main repair options. The one you choose depends upon personal aesthetics.


One of the most straightforward fixes is edging along the sides of the driveway, either from poured concrete or decorative bricks and pavers. First, your repair technician removes the crumbling asphalt strip along the driveway edge. They then prepare the edging trench and install a firm base inside it.

The last step is either pouring the concrete edging or laying the bricks to create a border on either side of the driveway. A flexible grout seal, often from a polymer compound, may go between the edging and the asphalt to allow for thermal expansion. Otherwise, a small space is left between the edge and the asphalt, so neither material will crack as it expands or contracts due to temperature changes.

Base extension

If you prefer to maintain a clean asphalt edge, you may need to extend the base. This process also requires that the damaged edges are first cut away. Then, add fresh gravel compacted to expand the driveway base as much as necessary to prevent future crumbling. Next, the repair technician will mechanically heat the edge of your driveway so it can bond with the patch. Finally, they will pour new hot asphalt to create a contemporary edge.

The main problem with base extension is that the new edge may be darker in color compared to the older asphalt. Seal coating or resurfacing the rest of the driveway can help camouflage the edge patches, making your driveway look nice.

Contact our experts on crushed asphalt in Fort Worth, TX, for more information on improving your damaged driveway. We want to be your paving contractor.

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