What salon tool is commonly used to create volume at the roots?

The round brush is commonly used to create volume at the roots, primarily during blow-drying. When styling hair, the round brush lifts the hair away from the scalp, allowing for added height and volume at the roots. As the hair is dried with hot air from a blow dryer, the round shape of the brush helps to curl and shape the hair, enhancing body and fullness.

While other tools have their specific uses, they are not as effective for adding volume at the roots in the same way. For example, a flat iron is designed primarily for straightening hair and may actually flatten the roots rather than lift them. A curling wand is mostly used for creating curls and waves, not for root volume, and a comb is typically used for detangling or smoothing hair rather than for styling that involves lifting at the roots. Thus, the round brush is the optimal tool for achieving desired root volume.