Crazing Crazing is a network of very fine, shallow surface cracks that creates a pattern resembling a spider web. It usually affects only the top layer of hardened concrete.
Crazing commonly develops when the concrete surface dries more quickly than the material beneath it during curing. The condition is generally cosmetic and does not usually reduce structural strength. However, severe crazing may make the surface more susceptible to weathering and moisture over time.
Frequently Asked Questions About Crazing
What is crazing in concrete?
A network of very fine, shallow surface cracks forming a pattern like a spider web, affecting only the top layer.
What causes crazing?
The surface drying faster than the concrete beneath it during curing, often from wind, sun, or finishing with excess water on the surface.
Is crazing structurally serious?
Generally no. It is cosmetic and does not usually reduce strength.
Does it need to be fixed?
Not usually, though severe crazing leaves the surface more open to moisture and weathering over time.