The basic steps in surface preparation include:

Source:www.stonediamondtool.com Date:2017/10/31 Read:592

· Cleaning the concrete to remove all substances that could inhibit the ability of the overlay to bond, such as dirt, oil and grease. It's also necessary to strip away any coatings, sealers or paints that may have been applied to the concrete.

· Removing any unsound concrete, such as minor spalling, scaling or delamination, down to solid concrete.

· Filling active cracks so they don't mirror through to the overlay. Typically any cracks equal to or wider than the width of a credit card will require repair.

· Profiling, or roughening, the concrete surface to improve the "grip" of the overlay.

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. This equipment not only removes most contaminants and unsound concrete, it will also leave behind a roughened surface profile.