Overlays are less expensive than reconstruction–they require less preparation time AND less asphalt to achieve the same result.

Keep in mind water flow concerns. 100% water flow with an overlay isn't always possible. Most asphalt contractors will not guarantee 100% water flow unless a 1 ½ % pitch can be established and maintained. Discuss water flow concerns with the contractor PRIOR to construction. They should offer to shoot elevations at no charge.

Make sure the proper amount of milling, which is grinding out the existing asphalt, is considered by concrete gutter lines and other adjoining structures. It's also important that the proper amount of patching and leveling has been detailed prior to contracting and overlay. In many instances the lowest bid will not include a sufficient amount of patching or prep work prior to the overlay. This will result in a shortened functional life of the asphalt overlay.

Most overlays are 1 ½ to 2 inches thick after compaction. Some contractors will quote a 2 inch overlay, but only pave a 1 ½ inch overlay. A minimum of 1 ½ inch mat after compaction is required to provide total load capacity of the new surface.

Here are examples of "alligatoring" and corrupted asphalt. In each case, the asphalt has deteriorated and cracked to a point that the asphalt pieces are loose. It's amazing how quickly asphalt can deteriorate from the elements, water infiltration, contact with clay and oxidation due to sunlight.

The key to long-lasting performance for any asphalt repair and maintenance process is site preparation. Removal of deteriorated and corrupted asphalt is the first step in the process. Milling is performed on surfaces that are uneven or minimally damaged while providing a stable surface for the new overlay.

Next, Allied crews clean the milled areas to best adhere to the new patch and overlay. Depending on the size and configuration of the project, the equipment used can vary between manual blowing, skid steer with a sweeper attachment, or use of a large Elgin Pelican pickup style street sweeper.

After cleaning, we apply CSS1H tack spray, a thin layer of oil that helps the new asphalt surface adhere to the underlying asphalt material.

The new layer, or asphalt lift is then installed. Depending on the project, it may be applied in layers 1 ½ to 2 ½ inches thick.

The entire surface is then rolled for compaction and smoothness. On commercial or municipal applications, new striping is applied.

The final product is attractive, durable and ready for several years of service.