What can happen?
What can happen if you don’t install stone that complies with the Marshalls Stone Standard?
All the softer sandstones will start to go green very quickly unless given expensive and often temperamental sealing treatments which have to be reapplied every year. These stones also have poor compaction between the sedimentary layers which could lead to the bedding planes separating and your stone starting to split and crack. Worse still, if moisture exploits the gaps in your stone, ice crystals can form and the surface of your stone could pop and come away in sheets. All these issues could happen to your new patio installation in a matter of months if you choose an inappropriate stone.