The two main causes of cracking or chipping concrete are exposure to the weather and vegetation. The best way to prevent this depends on the location and size of your concrete slab. Concrete can last as long as 30 years, but this requires proper care and maintenance. You should plan on resealing your concrete every year or two to guard from inclement weather. If you have a concrete walkway, you should keep vegetation trimmed and controlled around it so roots don’t take hold underneath.