Watch out for that old lime mortar on heritage jobs
Got a call last week to repoint a 1920s brick wall in the historic district. The homeowner said it was a simple job, maybe two days. I showed up, mixed my usual modern mortar, and started chipping out the old stuff. That's when the trouble started. The original mortar was a soft lime mix, and my harder cement-based mortar started cracking within hours as the old bricks moved. I had to stop everything, research proper lime mortar mixes, source the right hydrated lime, and redo the entire section. What was quoted as a 16-hour job turned into a full 80-hour week of work and learning. Has anyone else been caught out by not checking the mortar type on older buildings first?