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Three inches is a great thickness for a residential asphalt driveway that sees minimal to moderate traffic from cars, SUVs, and pickup trucks. However, a thicker driveway can better withstand the weight of a heavier vehicle, such as a trailer or a recreational vehicle. If you drive a heavy vehicle on a thin driveway, you risk cracking and damaging it.

An asphalt driveway should be at least 3 inches thick over a compacted gravel base. Areas with poor drainage should have a thicker stone base. To install a new asphalt driveway over an existing driveway, the new asphalt should be at least 2 inches thick and the existing driveway should be in relatively good condition.

If you notice minor cosmetic problems with your driveway, you should seal it. Look out for cracks and holes on the surface, faded asphalt or concrete, and stains from oil and other chemicals. Replacing your driveway may be necessary if you’re dealing with significant problems—¼-inch cracks, large potholes, and puddles from drainage issues. The cost to install an asphalt driveway typically ranges between $4,200 and $9,000, significantly more than resealing. Consider talking to a professional to discuss whether resurfacing your driveway—a midway project between resealing and replacing—is a better option for you.

If you’re looking for a similar, eco-friendly driveway material, you might consider one of these options:

• Permeable pavement: This material is sometimes called “pervious” or “porous” pavement; it allows stormwater to drain into the subbase, eliminating storm drain costs. 

• Gravel: Consider paving your driveway with locally sourced gravel. By sourcing from a nearby source, your money won’t fund international shipping and will be invested back into your local community.

• Natural stone pavers: Because natural stone pavers are made from organically-produced stone, there’s no new manufacturing required, limiting the environmental impact. In addition, water easily flows and drains through the gaps in the pavers.