Unlike solid concrete or continuous asphalt slabs that can crack under the immense pressures of Chicago's severe winter freeze-thaw cycles, an interlocking paver system is composed of thousands of individual joints. This design gives the entire layout a high degree of structural flexibility, allowing the surface to flex and adapt naturally to micro-ground movements without breaking or cracking. Furthermore, should an underground utility pipe ever require repair beneath your driveway or patio, the individual pavers can be cleanly removed and reinstalled seamlessly, preserving your high-end investment.