Blacktop Overlay One-Sentence Description After the area is first prepared, blacktop is applied with a paver (1 layer of blacktop Overlay) and compacted with a roller. Applications A blacktop Overlay is generally used over existing blacktop that is still in fair condition, yet is no longer sealing out water. Water is the biggest detriment to any road surface, as it causes cracks to form when the water freezes. Description First, the old blacktop must be cleaned, usually using a power broom. Then, a thin layer of E-2 liquid asphalt (also called "Tack Oil") is applied. The tack liquid asphalt will help the Overlay adhere to the old blacktop. Once the tack liquid asphalt is applied, a layer of bituminous concrete wearing coat (also referred to as ID-2 Wearing or "G-Top") is put down using a paver. The thickness of the Overlay will vary, but the minimum we usually recommend is 1-1/2 to 2 inches of ID-2 Wearing. After the ID-2 Wearing is applied, it will be compacted using a roller. Relative Cost Comparison A blacktop Overlay is generally a great deal less expensive because less material is needed, and the old blacktop does not need to be removed (an extensive labor and equipment cost). If your blacktop is still in good condition, an alternative to a blacktop Overlay may be Sealcoating. Miscellaneous To prolong the life of your blacktop Overlay, don't turn your vehicle's steering wheel while sitting in place, as this will scuff the finish. Also, heavy objects that exert a lot of force on a small area (such as motorcycle kickstands and picnic table legs) should not be allowed to sit directly on any blacktop, as they will indent and/or sink down into it - try placing a small block of wood underneath a kickstand, picnic table legs, etc.
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