Cover Survey is used to spot areas of low cover & enhance durability of concrete by taking corrective action! 

The purpose of cover in any concrete element is to provide protection to steel reinforcement from corrosion due to Carbonation and Chloride diffusion from the surface of the concrete. To achieve this purpose we need not add concrete cover and instead we could provide Carbonation & Chloride resistant products that would restrict diffusion of CO₂ and Chlorides in the concrete.

The primary reason for evaluating hardened concrete during construction is to ensure DURABILITY of the structures thereby ensuring satisfactory performance during the designed service life. Most buildings in the coastal regions show signs of distress much before the designed service life. This can be avoided by checking some important parameters of hardened concrete and taking corrective action based on their purpose and in a way that avoids any possible distress in the structure.