Slightly uneven concrete might not bother you at all, but it’s something you should still look into fixing. Settling only gets worse as the years go by, and not only will your driveway and patio look aesthetically unpleasing, you won’t be able to use those areas properly if you let it get too bad.    When Not to Worry    Concrete is not invincible and will deteriorate over time. Cracks and breakage are to be expected, and not all of them are caused by settling. You shouldn’t worry about breakage if all you see are hairline cracks. Even if they are plentiful, as long as the concrete is even, settling won’t occur for a long time.    If your garage, patio, driveway, or concrete pathway is still smooth and can be used without hassle, there is nothing to worry about. Hairline cracks are those that are small enough not to disrupt the functionality of the pavement.    When to Worry    You should worry about settling when parts of your concrete begin to crack unevenly. A sunken chunk of concrete, no matter how small, is the first sign of settlement. As the settlement gets worse, the gaps will get wider and the unevenness will become more apparent.    If things go too far, you might have trouble using your pavement adequately. The concrete will sink farther into the ground to the point where it will be difficult to walk on. As soon as you see unevenness in your concrete, especially in the edges and corners, you should start to take action before it gets worse and becomes a serious safety hazard.