While it is technically possible to pave asphalt over an existing driveway, it is generally not recommended. Overlaying asphalt over existing asphalt will result in an uneven surface with dips and uneven joints between existing asphalt and the new asphalt. This can cause water to pool and lead to premature cracking and failure of the new asphalt. Additionally, the added weight of the new asphalt can put additional strain on the underlying base and cause it to sink or settle unevenly. The existing asphalt will also need to be prepared to ensure proper drainage, which may require significant reshaping of the driveway, raising manhole covers, and grading the area.
For these reasons, it is usually better to remove the existing asphalt driveway completely before installing new asphalt, although it may be more expensive and time-consuming. This ensures a smooth, even surface and reduces the risk of problems in the future.
However, if you decide to pave asphalt over the existing driveway, consult a professional paving contractor to ensure it is done correctly and safely.
