Mortar matching is often seen as difficult to do, but once you understand that historic mortars primarily came from local sources, one need only look to the local geology including at roadside cuts to recognize the aggregates of a sand in their former condition. This is the wonder of the fractal nature of stone reduced to sand. And often the sand you seek is right beneath your feet!
Sand is not sand is not sand. Often when people are having stucco or plaster application problems (although the same can happen with bricklaying mortar), it turns out the aggregate is to blame. In short, it is not as simple as accepting whatever is at the local masonry supply house. Nor for that matter if… Continue reading What you need to learn from a mortar analysis about aggregates and ratios