How do you know if small cracks in a new concrete pool deck are serious?

However, here are some indicators to help you assess the severity of the cracks:

Width of the cracks: Cracks wider than 1/4 inch (6 mm) are more likely to be structural and require attention. Fine cracks or hairline cracks (less than 1/8 inch or 3 mm) are usually superficial and not a cause for concern.

Depth of the cracks: Deep cracks that extend the entire depth of the concrete slab are more serious than shallow surface cracks. To check the depth, insert a small screwdriver or other thin object into the crack. If it goes in more than 1/4 inch (6 mm), the crack is considered deep.

Pattern of the cracks: Cracks that form a random pattern are less likely to be structural than those that follow a straight line or appear in a grid-like pattern. Cracks that radiate from a single point or form a straight line may indicate an underlying structural issue.

Location of the cracks: Cracks around the pool coping or in high-traffic areas are more likely to be problematic as they can compromise the safety and aesthetics of the pool deck. Cracks in areas that experience heavy loads, such as around diving boards or cantilever umbrellas, should also be inspected carefully.

Movement in the cracks: If you notice that the cracks are widening or changing over time, this could indicate a more serious underlying issue. Monitor the cracks regularly and be alert to any changes in their appearance.

Overall, if you are concerned about the cracks in your new concrete pool deck, it's best to consult with a concrete contractor or structural engineer for a professional assessment to determine if they require repair or not. Regular inspection and maintenance of the pool deck can help prevent small cracks from turning into bigger problems.