Lack of Preparation
One of the most common errors when laying a flagstone walkway is not preparing properly. Many homeowners jump straight into the project without taking time out to think about how much material they will need or how they want it to look. Before you begin, lay the flagstone pavers in a pattern that you find pleasing and varied. This will not only help you visualise the final flagstone path but ensure you don’t wind up with too many or too few pavers.
Poorly Made Base for Flagstone Pavers
It is essential that you properly prepare the base in which you plan to set your flagstone pavers. Keep in mind that it will need to support weight and constant traffic. A poorly made base could see your flagstone walkway start to sink and slowly spread out in different directions.
An Unlevel Flagstone Walkway
When it comes to a flagstone walkway, safety is of utmost importance, so use large pieces and lay them close together to avoid gaps where guests could trip. Once you have set them down, walk up and down the path to find any stones that have shifted or tipped underfoot and adjust them accordingly.
Source: www.DoItYourself.com