The normal thickness of a PVDF (Polyvinylidene Fluoride) coating layer can vary depending on the specific application and the manufacturer's specifications. However, in architectural applications, including the coating of aluminum panels or sheets for building facades, a common range for PVDF coating thickness is typically between 25 to 35 microns (micrometers).

It's important to note that different manufacturers may offer variations in coating thickness based on their product specifications and the performance characteristics they aim to achieve. Thicker coatings may provide enhanced durability, weather resistance, and color retention.

When selecting PVDF-coated materials, it's advisable to consult with the manufacturer and review their technical data sheets to understand the recommended coating thickness for the intended application. Factors such as environmental conditions, desired aesthetic properties, and performance requirements can influence the choice of PVDF coating thickness for a particular project.