How to cut concrete control joints | #Sakrete Pro Tips A control joint is where we plan for concrete to shift and crack. ✅ For a smaller slab, use a hand groover. For a larger slab, consider a concrete saw. ✅ Control joints are usually placed 2-3x the width of the slab. For example, a 4' wide slab should have control joints 8'-12' apart. Prepping for a concrete project? Get more Pro Tips on Youtube or visit Sakrete.com. #concrete #slab #concretefinisher #construction #repair #renovation #remodel