This is a job best left to a professional who will be able to assess the condition of your existing concrete and determine the scope of work required to ensure good overlay bonding and performance.If only a small portion of your asphalt driveway or parking lot is starting showing signs of age - but not enough for replacement to be needed - then an asphalt overlay could solve your problem and save you the larger expense of completely re-surfacing it. The procedures will vary depending on the condition and age of the concrete and the surface preparation guidelines recommended by the overlay manufacturer. (Read more about proper surface preparation procedures and equipment.)Ĭlearly, this is a simple overview. This equipment not only removes most contaminants and unsound concrete, it will also leave behind a roughened surface profile. Using a machine that mechanically abrades the concrete, such as a grinder or shotblaster, is one of the most effective ways to prepare concrete substrates for resurfacing. Profiling, or roughening, the concrete surface to improve the "grip" of the overlay. (See steps in repairing cracks for a concrete resurfacing job.) Typically any cracks equal to or wider than the width of a credit card will require repair.
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