When it comes to landscaping, lava rocks can be used as an attractive and durable ground cover. They provide a natural look that is both aesthetically pleasing and resilient. Lava rocks are also very effective in preventing erosion, making them ideal for use in areas of your garden prone to water runoff or drainage issues. However, when using lava rocks there are certain things you need to consider before you get started on the project. Firstly, it's important to understand what should go beneath the lava rock layer so that your landscape looks its best and lasts longer. Generally speaking, it's recommended that soil or sand be laid down prior to installing the lava rock layer – this will help ensure better drainage and prevent sinking of the stones over time due to heavy rainfall or melting snow accumulation during winter months. Additionally, putting down a weed barrier cloth before laying out the lava rock will also help protect against any unwanted weeds sprouting up between the stones later on down the road!