Concrete is durable and can stand up to a range of weather conditions found across the country .Whereas traditional pavers and cobblestone settle unevenly during the freeze/thaw cycle of winter, exposed concrete is reinforced with 3/8-inch steel reinforcing rods placed 24 inches on-center-each-way, right in the middle of the concrete. This steel reinforcement gives the concrete the necessary tensile strength to resist the constant heaving produced by the freezing and thawing of the ground. Concrete is also better than pavers and cobblestone in spring and summer. Pavers and cobblestones are susceptible to joint deterioration if sand is not constantly brushed into all the joints. This joint deterioration results in ant hills, growth of unsightly grass and weeds and produces dangerous tripping hazards when the individual pavers settle unevenly.