Concrete Cracking 101: What Causes Cracks and How to Prevent Them (2025/2026)
If you’ve worked with concrete long enough, you already know one thing for sure — it’s going to crack . That’s just part of the trade. The goal isn’t to stop cracks completely — it’s to control where and how they happen . That’s what separates a clean, professional job from one that looks like a spider web. Let’s break down why concrete cracks , what you can do to keep it under control , and a few simple rules of thumb that’ll save you headaches (and callbacks) down the road. Why Concrete Cracks Concrete shrinks as it cures. Moisture leaves the mix, the slab tightens up, and if it doesn’t have anywhere to move — it cracks. Add in temperature swings, poor base prep, uneven thickness, or too much water in the mix, or a hot load and it’s a recipe for random cracking. The good news is, most cracks can be predicted and managed with the right prep and timing. How to Prevent Cracks — What You Actually Do on the Job Here are some pro tips. If you stick to these five steps, you’l...