Yes, it is possible to apply a new layer of blacktop (also known as asphalt) over an existing driveway. This process is commonly known as resurfacing or overlaying. It involves placing a new layer of asphalt on top of the existing surface to restore its appearance and functionality.
Here are the general steps involved in resurfacing a driveway with blacktop:
Evaluate the existing driveway: Before proceeding with the overlay, it's essential to assess the condition of the current driveway. Ensure that the base is stable, free from major cracks or damage, and capable of supporting the additional layer of asphalt.
Clean the existing surface: Thoroughly clean the existing driveway to remove any debris, dirt, or vegetation. Use a broom, pressure washer, or other suitable cleaning methods to ensure a clean and solid surface for the new asphalt layer.
Repair any damage: If there are any potholes, cracks, or significant damage on the existing driveway, it's crucial to repair them before proceeding with the overlay. Fill any cracks or potholes using suitable asphalt patching materials.
Apply a tack coat: Before placing the new asphalt layer, it's common to apply a tack coat, which is a thin layer of asphalt adhesive. The tack coat helps create a bond between the old and new layers of asphalt.
Lay the new asphalt layer: Once the tack coat is applied and dried, the new layer of blacktop can be installed. The thickness of the new layer can vary depending on the condition of the existing driveway and the specific requirements. Typically, a thickness of 1.5 to 2 inches is recommended for residential driveways.
Compact and smooth the new surface: After the new asphalt layer is laid, it needs to be compacted to achieve a smooth and level surface. A vibratory roller is often used for this purpose, ensuring proper compaction and adhesion between the layers.
Allow for curing time: The newly resurfaced driveway requires time to cure and harden before it can be used. The curing time can vary depending on factors such as weather conditions, temperature, and the type of asphalt used. It's best to follow the recommendations of the contractor or asphalt manufacturer regarding the curing period.
It's important to note that the success and longevity of the overlay will depend on the condition of the existing driveway, the quality of materials used, and the expertise of the contractor performing the work. It is advisable to consult with a professional asphalt contractor who can assess your specific situation and provide appropriate recommendations.