How often should a conductivity test be performed on the first 1000 square feet of a surface?

The correct approach to conducting a conductivity test on the first 1000 square feet of a surface is to perform it once every 200 square feet. This frequency allows for a thorough assessment of the surface’s condition and ensures that any variations in conductivity can be identified and addressed. Conductivity testing is critical in determining the presence of contaminants, such as salts or other conductive materials, that can adversely affect the adhesion and performance of coatings applied to metal surfaces.

By testing every 200 square feet, inspectors can systematically evaluate the surface and gather sufficient data to form a comprehensive picture of its overall readiness for painting. This systematic approach minimizes the risk of overlooking areas that may require cleaning or preparation before coating, ultimately leading to a better quality finish and enhanced durability for the applied paint.