What are the lines in concrete called? A simple breakdown
If you're staring at your driveway or walking down the sidewalk wondering what are the lines in concrete called, you're actually looking at what pros call control joints or expansion joints. Most people just see them as patterns or trip hazards for kids playing "step on a crack, break your mother's back," but they are actually the only thing keeping that massive slab of stone from looking like a shattered mirror after a few seasons. ...