Why control joints exist
Managing cracking
Cracks tend to form at the thinnest, weakest points. Control joints intentionally create those weak points where they will not be as visible or as harmful.
How they are placed
Spacing
Joint spacing is planned based on slab thickness and layout.
Cut or tooled
Joints are either saw-cut shortly after the pour or tooled into the surface during finishing.
What they are not
Not expansion joints
Expansion joints handle a different kind of movement and are placed where the slab meets other structures.
Frequently Asked Questions
Do control joints prevent all cracking?
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No. They help direct where cracking is more likely to occur, but they do not eliminate cracking.
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