It isn’t hard to determine whether there is a structural problem as the signs are usually obvious. If you find evidence of structural damage, there is an underlying problem which necessitates the replacement of some or even all the concrete. Further clear signs of damage are deep and large cracks running through the slab or if you can see the surface turning into pieces of powder or sand. It is a mistake to try resurfacing concrete in this condition because all you can do is mask the problems for a short period of time.
Resurfacing is very effective on concrete with minor pits or cracks as long as these issues are repaired before the project begins. Bear in mind that most concrete resurfacers are not reliable beyond a depth of 0.5 inches.
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