A drywaller in Denver gave me a warning about lime mortar that I ignored
I was working a small garden wall job in Denver a few years back, and a drywaller unloading his truck next to me saw my bags of Portland cement. He said 'You use that for repointing old brick, you'll crack the face off in a year.' I brushed him off because I was in a hurry and figured he just worked with drywall, not masonry. Three months after I finished a job in Capitol Hill, the homeowner called me showing me hairline cracks in the bricks. He was right. The Portland was too hard for the soft old brick. I had to chip it all out and redo it with NHL lime. Has anyone else ran into trouble mixing modern cement with historic brick?