Random dry laid flagstone is one of the most popular ways to install flagstone. It has a much more natural look than the other methods, and can be a little more cost effective than the other methods also. Its great for using around mature trees where you might not be able to excavate to the 11" required for interlock. You don't want to remove too many of the roots from mature trees, so with random flagstone being a little more rugged you can work around them.
Flagstone can be laid one of two ways; either dry laid or mortared. The dry laid method is much similar to how we install interlock, and consist of: