Choosing the perfect stone and hiring a skilled mason can still lead to failure if one critical detail is overlooked: an air gap and drainage path behind the stone.
Most homeowners never see this part of the wall, leading to the assumption that the stone and mortar are sufficient. However, stone and mortar are not waterproof. Water will inevitably find its way behind the veneer during heavy rain, wind-driven storms, or snowmelt. Without a proper drainage path, this water can create a slow, hidden problem within the wall.
