Finally figured out why my corners kept cracking on those big commercial jobs
For years I'd see hairline cracks in the mortar at the corners of big block walls, especially on warehouse builds. I always blamed the mix or the weather. Then last month, I watched a guy from a different crew lay a corner, and he was buttering the end of every block before he set it. I never did that on long runs, just the beds. Tried it on a job in Knoxville building a 40 foot retaining wall, and after 6 months, not a single crack. It's such a simple fix, but it makes the whole corner unit solid. Anyone else have a little trick like that they picked up from watching someone else work?