Interlock Paving – The Advantages and Disadvantages Despite its popularity, there are plenty of situations where poured concrete simply isn’t the best choice. Not all of us live in areas where the ground is both flat and firm, which is where a poured concrete surface performs best. The function of concrete is basically to bridge soft spots and form an even surface, but compared to interlock paving, it can leave a lot to be desired. Its life expectancy is relatively short (10 – 20 years, depending on climate and topography) and of course, it is notably lacking in aesthetic appeal. By contrast,...